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SCOPE NOTE: a. b. c. Incorporated PSDs: PSD 6-4 Cancelled PSDs: NONE

This specification establishes the requirements for electrical bonding connectors with electrically conductive finishes to structure. In case of conflict between this specification and the engineering drawing, the provisions of the engineering drawing shall prevail. This specification requires certified personnel and certified test equipment.

WARNING

WARNINGs may be included throughout this specification. Do not take these WARNINGs to be all inclusive, nor to completely describe hazards or precautionary measures applicable to specific procedures or operating environments. Non-Boeing personnel shall refer to their employer's safety instructions for information concerning hazards which may occur during operations described in this specification.

d. 2

Refer to BAC001PREF for guidance on use of Boeing process specifications and Boeing process specification departures.

CLASSIFICATION This specification consists of the following Types of receptacle connector electrical bonding processes: Type I: Bonding of Circular Receptacle Connectors in Unpressurized Areas Type II: Bonding of Circular Receptacle Connectors in Pressurized Areas Type III: Bonding of BACC65AB, BACC65AP and BACC65AV Receptacle Connectors in Unpressurized Areas Type IV: Bonding of BACC65AB, BACC65AP, BACC65AV and MTCPQKT Receptacle Connectors in Pressurized Areas Type V: Bonding of ARINC 404 and 600 series Plug Connectors in Pressurized Areas

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REFERENCES The current issue of the following documents shall be considered a part of this specification to the extent herein indicated. BAC5000 BAC5009 BAC5019 BAC5022 - Sealing General - Bolt and Nut Installation - Chromic Acid Anodizing - Sulfuric Acid Anodic Films - Colored Chemical Conversion Coatings for Aluminum REV: (D) 23-FEB-2006 (E) 23-MAR-2009 ELECTRICAL BONDING OF RECEPTACLES

BAC5626 ORIGINAL ISSUE: 24-APR-2003 Authorizing Signatures on File

BAC5117-1

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BOEING PROCESS SPECIFICATION

CAGE CODE 81205

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REFERENCES (Continued) BAC5632 BAC5719 BAC5730 BAC5744 BAC5748 BAC5750 BSS7604 BSS7617 - Boric Acid - Sulfuric Acid Anodizing - Chemical Conversion Coatings For Aluminum and Aluminum Alloys - Shot Peening - Manual Cleaning (Cold Alkaline, Solvent, Emulsion and Foam Cleaners) - Abrasive Cleaning, Deburring, and Finishing - Solvent Cleaning - Sealing Operations, Personnel Certification for - Electrical Bonding and Grounding, Personnel Certification for

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CONTENTS Section 1 2 3 4 5 5.1 6 7 8 8.1 8.2 8.2.1 8.2.2 8.2.3 8.2.4 8.2.5 8.3 8.3.1 8.3.2 8.3.3 8.3.4 8.4 Title SCOPE........................................................................................ CLASSIFICATION....................................................................... REFERENCES............................................................................ CONTENTS................................................................................. MATERIALS CONTROL.............................................................. MATERIAL STORAGE CONTROL.............................................. FACILITIES CONTROL............................................................... DEFINITIONS.............................................................................. MANUFACTURING CONTROL................................................... PERSONNEL REQUIREMENTS................................................. TYPE I: BONDING OF CIRCULAR RECEPTACLE CONNECTORS IN UNPRESSURIZED AREAS.......................... SURFACE PREPARATION......................................................... RECEPTACLE INSTALLATION.................................................. RESISTANCE TEST.................................................................... SEALING OF RECEPTACLE ASSEMBLY.................................. REFINISHING.............................................................................. TYPE II: BONDING OF CIRCULAR RECEPTACLE CONNECTORS IN PRESSURIZED AREAS............................... SURFACE PREPARATION......................................................... RECEPTACLE INSTALLATION.................................................. RESISTANCE TEST.................................................................... REFINISHING.............................................................................. TYPE III: BONDING OF BACC65AB, BACC65AP AND BACC65AV RECEPTACLE CONNECTORS IN UNPRESSURIZED AREAS......................................................... SURFACE PREPARATION......................................................... RECEPTACLE INSTALLATION.................................................. RESISTANCE TEST.................................................................... SEALING OF RECEPTACLE ASSEMBLY.................................. REFINISHING.............................................................................. Page 1 1 1 3 8 8 8 8 10 10 10 10 12 13 13 14 15 15 16 17 17

17 17 19 19 19 20

8.4.1 8.4.2 8.4.3 8.4.4 8.4.5

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CONTENTS (Continued) Section 8.5 Title TYPE IV: BONDING OF BACC65AB, BACC65AP, BACC65AV AND MTCPQKT RECEPTACLE CONNECTORS IN PRESSURIZED AREAS.............................................................. SURFACE PREPARATION......................................................... RECEPTACLE INSTALLATION.................................................. Installation of BACC65AB, BACC65AP and BACC65AV Receptacle Connectors................................................................ Installation of MTCPQKT Receptacle Connectors....................... RESISTANCE TEST.................................................................... REFINISHING.............................................................................. TYPE V: BONDING OF ARINC 404 AND 600 SERIES PLUG CONNECTORS IN PRESSURIZED AREAS............................... SURFACE PREPARATION......................................................... GROUND BLOCK INSTALLATION TO CONNECTOR............... RECEPTACLE INSTALLATION.................................................. RESISTANCE TEST.................................................................... REFINISHING.............................................................................. GENERAL SURFACE PREPARATION....................................... ABRASIVE CLEANING METHOD CM1...................................... Abrasive Material......................................................................... Stainless Steel Rotary Brush....................................................... Abrasive Disc............................................................................... SOLVENT CLEANING METHOD CM3........................................ MAINTENANCE CONTROL........................................................ CLEANING EQUIPMENT............................................................ PILOTED ROTARY BONDING BRUSH TOOLS......................... NON-PILOTED ROTARY BONDING BRUSH TOOL.................. PILOTED ROTARY ABRASIVE DISC MANDREL TOOLS......... NON-PILOTED ROTARY ABRASIVE DISC TOOL..................... TEST EQUIPMENT..................................................................... GENERAL.................................................................................... TEST EQUIPMENT USED IN AREAS SUBJECT TO COMBUSTION, FIRE AND EXPLOSIONS.................................. TEST EQUIPMENT USED ON ELECTRO-EXPLOSIVE DEVICES..................................................................................... Page

20 20 21 21 22 22 22 22 22 25 25 25 25 26 28 28 28 29 30 30 30 30 36 37 40 41 41 41 42

8.5.1 8.5.2 8.5.2.1 8.5.2.2 8.5.3 8.5.4 8.6 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.7 8.7.1 8.7.1.1 8.7.1.2 8.7.1.3 8.7.2 9 9.1 9.1.1 9.1.2 9.1.3 9.1.4 9.2 9.2.1 9.2.2 9.2.3

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CONTENTS (Continued) Section 9.2.4 10 11 11.1 12 12.1 12.2 12.3 12.4 13 Title TEST EQUIPMENT USED IN AREAS CONSIDERED AS NONHAZARDOUS.............................................................................. QUALITY CONTROL................................................................... REQUIREMENTS........................................................................ RESISTANCE OF RECEPTACLE BONDS................................. TEST METHODS......................................................................... RESISTANCE MEASUREMENT OF RECEPTACLE BONDS TO STRUCTURE............................................................................... RESISTANCE MEASUREMENT OF SHIELD TERMINATION TO STRUCTURE......................................................................... RESISTANCE MEASUREMENT OF A GROUND BLOCK TO STRUCTURE............................................................................... RESISTANCE MEASUREMENT OF SHIELD SOCK TERMINATION TO STRUCTURE............................................... QUALIFICATION......................................................................... LIST OF FIGURES Figure FIGURE 1 FIGURE 2 FIGURE 3 FIGURE 4 FIGURE 5 FIGURE 6 FIGURE 7 FIGURE 8 FIGURE 9 FIGURE 10 FIGURE 11 FIGURE 12 Title SURFACE PREPARATION FOR RECEPTACLE BOND INSTALLATION........................................................................... SEALING OF RECEPTACLE BONDS IN UNPRESSURIZED AREAS......................................................................................... CLEANED AREAS....................................................................... INSTALLATION OF THE RECTANGULAR RECEPTACLE CONNECTOR SHELL................................................................. SURFACE PREPARATION FOR ARINC CONNECTOR............ ST913K BONDING BRUSH......................................................... ST913K BONDING BRUSH PART NUMBER STRUCTURE...... ST913KA BONDING BRUSH...................................................... ST913KA BONDING BRUSH PART NUMBER STRUCTURE............................................................................... ST913KB BONDING BRUSH...................................................... ST913KB BONDING BRUSH PART NUMBER STRUCTURE............................................................................... ST913KD NON-PILOTED BONDING BRUSH............................ Page Page

42 42 42 43 45 46 48 50 50 51

11 14 18 19 24 30 31 32 32 34 35 37

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CONTENTS (Continued) Figure FIGURE 13 FIGURE 14 FIGURE 15 FIGURE 16 FIGURE 17 FIGURE 18 FIGURE 19 FIGURE 20 FIGURE 21 FIGURE 22 FIGURE 23 FIGURE 24 Title ST913KD BONDING BRUSH PART NUMBER STRUCTURE............................................................................... ST913M ABRASIVE DISC MANDREL........................................ ST913M ABRASIVE DISC MANDREL PART NUMBER STRUCTURE............................................................................... ST913M-D ABRASIVE DISC....................................................... ST913M-D ABRASIVE DISC PART NUMBER STRUCTURE..... 3M ROLOC SYSTEM.................................................................. IDENTIFICATION OF TEST REQUIREMENTS.......................... TEST POINTS FOR CIRCULAR RECEPTACLE TO STRUCTURE BOND................................................................... TEST POINTS FOR RECTANGULAR RECEPTACLE TO STRUCTURE BOND................................................................... TEST POINTS FOR RECEPTACLE WITH A STRAIN RELIEF BACKSHELL................................................................................ TEST POINTS FOR RECEPTACLE WITH A PERIPHERAL BACKSHELL................................................................................ TEST POINTS FOR RECEPTACLE WITH A SHIELD TERMINATOR BAND.................................................................. LIST OF TABLES Table TABLE I TABLE II TABLE III TABLE IV TABLE V TABLE VI TABLE VII TABLE VIII TABLE IX TABLE X TABLE XI TABLE XII Title LIST OF MATERIALS.................................................................. SELECTION OF SEALANT......................................................... SURFACE CLEANING METHODS............................................. OBSOLETE AND EQUIVALENT CLEANING METHODS........... ST913K BONDING BRUSH PART NUMBER SELECTION........ ST913KA BONDING BRUSH PART NUMBER SELECTION...... ST913KB BONDING BRUSH PART NUMBER SELECTION...... BONDING BRUSH COLOR CODE............................................. ST913M ABRASIVE DISC MANDREL PART NUMBER SELECTION................................................................................. ST913M-D ABRASIVE DISC PART NUMBER SELECTION...... 3M SCOTCH-BRITE ROLOC SYSTEM PART NUMBERS......... RESISTANCE OF RECEPTACLE TO STRUCTURE BONDS.... Page 8 13 26 27 31 32 35 36 38 39 40 44 Page

37 37 37 38 38 40 43 47 47 48 48 49

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CONTENTS (Continued) Table TABLE XIII Title RESISTANCE BETWEEN RECEPTACLE SHIELD TERMINATION AND STRUCTURE............................................ Page

44

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MATERIALS CONTROL Materials used in this specification are identified in Table I. TABLE I - LIST OF MATERIALS MATERIAL TYPE DESCRIPTION SPECIFICATION Fuel Tank Sealant (Low BMS5-45, Class B Density) Pressure and Environmental BMS5-95, Class B Sealant-Chromate Type Low Density Sealant BMS5-142, Class B SUPPLIER See Qualified Products List See Qualified Products List See Qualified Products List

Sealing

5.1

MATERIAL STORAGE CONTROL Material storage control requirements for sealing material are in accordance with BAC5000.

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FACILITIES CONTROL Not applicable to this specification.

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DEFINITIONS The following definitions shall apply to terms which are uncommon or have special meaning as used in this specification. Bonding Surface - The conductive surface of a structure, part, or component which is to be electrically bonded to by the processes of this specification. See Table III for a list of bonding surfaces. - Personnel who have been instructed in the applicable assembly, installation, sealing, testing and inspection procedures of electrical bonding and have demonstrated proficiency in these procedures. (See Section 8.1.) - A bonding surface from which all surface finishes and contaminants have been removed that could cause corrosion or electrical resistance greater than specified limits. See Table III for surface finishes and contaminants to be removed. - Organic compound applied to structure to provide supplementary corrosion protection. - Electrical bonds whose resistance requirements are specified either by direct call out on the engineering drawing or by reference to this process specification. Designated bonds are electrical bonds of such importance that each bond shall be tested to verify its resistance requirement is met. Sample testing of designated bonds is not allowed. Note: See Figure 19 for direction on how to determine if a bond is a designated bond.

Certified Personnel

Cleaned Surface

Corrosion Inhibiting Compound (CIC) Designated Bond

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DEFINITIONS (Continued) Designated Ground - Electrical grounds whose resistance requirements are specified either by direct call out on the engineering drawing or by reference to this process specification. Designated grounds are electrical grounds of such importance that each ground shall be tested to verify its resistance requirement is met. Sample testing of designated grounds is not allowed. - A fixed union between two objects that results in electrical conductivity between those objects. - Connecting two or more conductive surfaces to form an electrically conductive joint. - An electrically conductive return path from equipment to structure. - A surface prepared to fit against a second surface such that an electrical bond results from physical contact between the two surfaces. - The technique or process of enclosing a joint or component (such as an installed fastener or fitting) with sealant. - Work area that may contain or be contaminated with combustible material or vapor.

Electrical Bond Electrical Bonding Electrical Ground Electrical Faying Surface Encapsulate Fire/Explosion Hazard Area

Flammable Leakage - Work area where combustible liquid or vapor may be expected to Zone occur due to single failure or leakage during operation. Fuel Tank Area Non-designated Bond - Region located inside the fuel tank or inside the surge tank. - Electrical bonds whose resistance requirements are specified either by direct call out on the engineering drawing or by reference to this process specification. Each non-designated bond shall be tested to verify resistance unless an approved sampling plan allows sample testing. Note: See Figure 19 for direction on how to determine if a bond is a non-designated bond. - Electrical grounds whose resistance requirements are specified either by direct call out on the engineering drawing or by reference to this process specification. Each non-designated ground shall be tested to verify resistance unless an approved sampling plan allows sample testing. - For bonding and grounding purposes, this is the major metallic portion of an airplane or missile which carries primary structural loads.

Non-designated Ground

Primary Structure

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DEFINITIONS (Continued) NOTE: The following are examples of primary structure: Body Metal stringers, frames, skins, floor beams and keel beams; Wing - Metal front and rear spar webs and skins; Empennage - Metal vertical fins and horizontal stabilizers.

Steel Surface Finish 8

- In this specification refers to stainless steel, corrosion resistant steel (CRES) or low alloy steel. - Finishes which have been applied on top of a bonding surface and which are required to be removed prior to electrical bonding.

MANUFACTURING CONTROL

WARNING

This specification involves the use of chemical substances which are hazardous. Boeing personnel shall refer to the work area Hazard Communication Handbook for health effect and control measure information contained in the HazCom Info Sheets and Material Safety Data Sheets. For disposition of hazardous waste materials, consult site environmental engineers for proper disposal methods. Non-Boeing personnel should refer to manufacturer's Material Safety Data Sheet(s) and their employer's safety instructions.

8.1

PERSONNEL REQUIREMENTS a. Personnel who perform surface preparation, installation, refinishing and resistance testing of receptacle bonds shall be certified in accordance with BSS7617, Types I and IV-1. Personnel who perform inspection of the surface preparation, installation, refinishing and resistance testing of receptacle bonds shall be certified in accordance with BSS7617, Types I and VII. Personnel who perform mixing, application, in-process inspection and final inspection of sealant shall be certified in accordance with BSS7604.

b.

c. 8.2

TYPE I: BONDING OF CIRCULAR RECEPTACLE CONNECTORS IN UNPRESSURIZED AREAS SURFACE PREPARATION a. Structure's surface that mates with receptacle flange: (1) If the structure's electrical faying surface is masked, carefully remove the mask. (2) Prepare the faying surface in accordance with Section 8.7. Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the receptacle flange is clean. See Figure 1 for area to be cleaned.

8.2.1

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8.2.1

SURFACE PREPARATION (Continued) (3) For aluminum receptacle mating surfaces cleaned using abrasive cleaning method CM1 (Section 8.7.1), manually apply Alodine 600 to the cleaned area in accordance with BAC5719, Type II, Class D or BAC5626, Type II, Class B.

FIGURE 1 - SURFACE PREPARATION FOR RECEPTACLE BOND INSTALLATION b. Structure's surface that mates with fastener bolt head/washer: (1) If the structure's electrical faying surface is masked, carefully remove the mask.

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8.2.1

SURFACE PREPARATION (Continued) (2) For aluminum and steel structure, prepare the faying surface in accordance with abrasive cleaning method CM1 (Section 8.7.1). Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the fastener heads/ washers is clean. See Figure 1 for surface areas to be cleaned. (3) Do not apply Alodine to aluminum surface areas cleaned under the fastener heads/ washers. These areas are to remain bare aluminum. (4) For nickel-plated composite structure, prepare the faying surface in accordance with cleaning method CM3 (Section 8.7.2). Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the fastener heads/ washers is clean. See Figure 1 for surface areas to be cleaned. c. Receptacle Surface Preparation: Clean both sides of receptacle flange using solvent cleaning method CM3 (Section 8.7.2).

8.2.2

RECEPTACLE INSTALLATION a. b. c. d. Complete receptacle installation within 24 hours of surface preparation. Recleaning of the surfaces is required if the installation is not completed within 24 hours. Use fastener hardware specified on the engineering drawing. Put a washer on each of the four fasteners. To attach the receptacle with lock nuts: (1) Align the mounting holes of the receptacle flange and the installation surface. (2) Install each fastener from the side opposite to the receptacle flange. (See Figure 1). (3) Put a washer and lock nut on each fastener. (4) Tighten each nut until the nut and washer are against the surface of the receptacle flange. (5) Tighten each nut a small amount until the faying surface of the receptacle flange is fully flat against the installation surface. (6) Torque each nut on size 4 fasteners 8 to 15 inch-pounds. (7) Torque each nut on size 6 fasteners 12 to 15 inch-pounds.

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8.2.2

RECEPTACLE INSTALLATION (Continued) (8) For the torque values of different size nuts, refer to BAC5009. e. To attach the receptacle with a nut ring: (1) Place the nut ring against the receptacle flange. (2) Align the mounting holes of the nut ring, the receptacle flange, and the installation surface. (3) From the side opposite to the receptacle flange, engage the threads of the fasteners to the nuts on the nut ring. (4) Tighten each fastener a small amount until the faying surface of the receptacle flange is fully flat against the installation surface. (5) Torque each size 4 fastener 8 to 15 inch-pounds. (6) Torque each size 6 fastener 12 to 15 inch-pounds. (7) For the torque values of different size fasteners, refer to BAC5009.

8.2.3

RESISTANCE TEST a. b. Measure the electrical resistance in accordance with Section 12. Verify that the resistance meets the requirements of Section 11. Complete resistance measurement within 24 hours of surface preparation.

8.2.4

SEALING OF RECEPTACLE ASSEMBLY a. Select an applicable sealant from Table II depending on the area in which the receptacle is installed. TABLE II - SELECTION OF SEALANT BOND LOCATION Fuel Tank Areas Non-Fuel Tank Areas SEALANT BMS5-45, Class B BMS5-45, Class B BMS5-95, Class B BMS5-142, Class B

b.

Apply sealant in the following areas in accordance with BAC5000 and as shown in Figure 2: (1) Apply a fillet seal around the receptacle flange.

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8.2.4

SEALING OF RECEPTACLE ASSEMBLY (Continued) (2) Apply a fillet seal around the receptacle shell. (3) If a nut ring is used, an additional fillet seal is required around all edges of the nut ring flange. (4) Apply a fillet seal to fastener, washer and installation surface joints. NOTE: It is acceptable to encapsulate the fastener heads and washers with sealant.

(5) Apply fillet seal to the nut, washer and installation surface joints. NOTE: It is acceptable to encapsulate the nut ring flange, nuts, washers and connector receptacle barrel with sealant (See Figure 2). Incidental sealant contact with the backshell coupling nut is acceptable. Avoid applying sealant onto the knurled area of the backshell coupling nut.

FIGURE 2 - SEALING OF RECEPTACLE BONDS IN UNPRESSURIZED AREAS c. 8.2.5 Complete sealing of receptacle assembly within seven days after removal of the original finish.

REFINISHING a. Determine if refinishing is required. (1) If engineering drawing requires refinishing and specifies finish to apply then refinish in accordance with the drawing.

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8.2.5

REFINISHING (Continued) (2) If engineering drawing states refinishing is not required then do not apply finish. (3) If engineering drawing does not indicate if refinishing is required then apply all of the original finishes specified in the engineering drawing. b. Apply finishes to any surface areas that were previously cleaned and are not covered by sealant around the receptacle flange or fastener bolt heads/washers. OPTION: If an aluminum part included an anodized surface and the finish was removed during the surface preparation, manually apply chemical conversion coating on the remaining area of the faying surface without the finish. Refer to BAC5719, Type II or V manual application or BAC5626, Type II manual application. Then apply all other finishes called out on the engineering drawing. c. Apply all finishes within seven days after the original finish is removed.

8.3

TYPE II: BONDING OF CIRCULAR RECEPTACLE CONNECTORS IN PRESSURIZED AREAS SURFACE PREPARATION a. Structure's surface that mates with receptacle flange: (1) If the structure's electrical faying surface is masked, carefully remove the mask. (2) Prepare the faying surface in accordance with Section 8.7. Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the receptacle flange is clean. See Figure 1 for area to be cleaned. (3) For aluminum receptacle mating surfaces cleaned using abrasive cleaning method CM1 (Section 8.7.1), manually apply Alodine 600 to the cleaned area in accordance with BAC5719, Type II, Class D or BAC5626, Type II, Class B. b. Structure's surface that mates with fastener bolt head/washer: (1) If the structure's electrical faying surface is masked, carefully remove the mask. (2) Prepare the faying surface in accordance with Section 8.7. Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the fastener heads/washers is clean. See Figure 1 for surface areas to be cleaned. (3) For aluminum mating surfaces cleaned using abrasive cleaning method CM1 (Section 8.7.1), manually apply Alodine 600 to the cleaned area in accordance with BAC5719, Type II, Class D or BAC5626, Type II, Class B.

8.3.1

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8.3.1

SURFACE PREPARATION (Continued) c. Receptacle Surface Preparation: Clean both sides of receptacle flange using solvent cleaning method CM3 (Section 8.7.2).

8.3.2

RECEPTACLE INSTALLATION a. b. c. d. Complete receptacle installation within 24 hours of surface preparation. Recleaning of the surfaces is required if the installation is not complete within 24 hours. Use fastener hardware specified on the engineering drawing. Put a washer on each of the four fasteners. To attach the receptacle with lock nuts: (1) Align the mounting holes of the receptacle flange and the installation surface. (2) Install each fastener from the side opposite to the receptacle flange. (See Figure 1). (3) Put a washer and lock nut on each fastener. (4) Tighten each nut until the nut and washer are against the surface of the receptacle flange. (5) Tighten each nut a small amount until the faying surface of the receptacle flange is fully flat against the installation surface. (6) Torque each nut on size 4 fasteners 8 to 15 inch-pounds. (7) Torque each nut on size 6 fasteners 12 to 15 inch-pounds. (8) For the torque values of different size nuts, refer to BAC5009. e. To attach the receptacle with a nut ring: (1) Place the nut ring against the receptacle flange. (2) Align the mounting holes of the nut ring, the receptacle flange, and the installation surface. (3) From the side opposite to the receptacle flange, engage the threads of the fasteners to the nuts on the nut ring.

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8.3.2

RECEPTACLE INSTALLATION (Continued) (4) Tighten each fastener a small amount until the faying surface of the receptacle flange is fully flat against the installation surface. (5) Torque each size 4 fastener 8 to 15 inch-pounds. (6) Torque each size 6 fastener 12 to 15 inch-pounds. (7) For the torque values of different size fasteners, refer to BAC5009.

8.3.3

RESISTANCE TEST a. b. Measure the electrical resistance in accordance with Section 12. Verify that the resistance meets the requirements of Section 11. Complete resistance measurement within 24 hours of surface preparation.

8.3.4

REFINISHING a. Determine if refinishing is required. (1) If drawing requires refinishing and specifies finish to apply then refinish in accordance with the drawing. (2) If drawing states refinishing is not required then do not apply finish. (3) If drawing has no indication if refinishing is required then apply all of the original finishes specified in the engineering drawing. b. Apply finishes to any surface areas that were previously cleaned around the receptacle flange or fastener bolt heads/washers. OPTION: If an aluminum part included an anodized surface and the finish was removed during the surface preparation, manually apply chemical conversion coating on the remaining area of the faying surface without the finish. Refer to BAC5719, Type II or V manual application or BAC5626, Type II manual application. Then apply all other finishes called out on the engineering drawing. c. Apply all finishes within seven days after the original finish is removed.

8.4

TYPE III: BONDING OF BACC65AB, BACC65AP AND BACC65AV RECEPTACLE CONNECTORS IN UNPRESSURIZED AREAS SURFACE PREPARATION a. Structure's surface that mates with receptacle flange:

8.4.1

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8.4.1

SURFACE PREPARATION (Continued) (1) If the structure's electrical faying surface is masked, carefully remove the mask. (2) Prepare the faying surface in accordance with Section 8.7. Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the receptacle flange is clean. See Figure 3 for area to be cleaned. (3) For aluminum receptacle mating surfaces cleaned using abrasive cleaning method CM1 (Section 8.7.1), manually apply Alodine 600 to the cleaned area in accordance with BAC5719, Type II, Class D or BAC5626, Type II, Class B.

FIGURE 3 - CLEANED AREAS b. Structure's surface that mates with fastener bolt head: (1) If the structure's electrical faying surface is masked, carefully remove the mask. (2) For aluminum and steel structure, prepare the faying surface in accordance with abrasive cleaning method CM1 (Section 8.7.1). Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the fastener heads is clean. (3) Do not apply Alodine to aluminum surface areas cleaned under the fastener heads. These areas are to remain bare aluminum. (4) For nickel-plated composite structure, prepare the faying surface in accordance with cleaning method CM3 (Section 8.7.2). Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the fastener heads is clean.

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8.4.1

SURFACE PREPARATION (Continued) c. Receptacle Surface Preparation: Clean both sides of receptacle flange using solvent cleaning method CM3 (Section 8.7.2).

8.4.2

RECEPTACLE INSTALLATION a. b. c. d. e. f. g. h. Complete receptacle installation within 24 hours of surface preparation. Recleaning of the surfaces is required if the installation is not completed within 24 hours. Use fastener hardware specified on the engineering drawing. Align the mounting holes of the receptacle flange and the installation surface. Install each fastener from the side opposite to the receptacle flange. (See Figure 4). Tighten each fastener until the fastener head is against the surface of the mounting structure. Tighten each fastener a small amount until the faying surface of the receptacle flange is fully flat against the installation surface. Torque each size 6 fastener to 12 to 15 inch-pounds. For the torque values of different size fasteners, refer to BAC5009.

FIGURE 4 - INSTALLATION OF THE RECTANGULAR RECEPTACLE CONNECTOR SHELL 8.4.3 RESISTANCE TEST a. b. 8.4.4 Measure the electrical resistance in accordance with Section 12. Verify that the resistance meets the requirements of Section 11. Complete resistance measurement within 24 hours of surface preparation.

SEALING OF RECEPTACLE ASSEMBLY a. Select an applicable sealant from Table II depending on the area in which the bond is installed.

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8.4.4

SEALING OF RECEPTACLE ASSEMBLY (Continued) b. Apply sealant in the following areas in accordance with BAC5000. (1) Apply a fillet seal around the receptacle flange. (2) Apply a fillet seal around the receptacle shell. (3) Apply a fillet seal to the fastener bolt heads and installation surface joints. NOTE: c. It is acceptable to encapsulate the fastener heads with sealant.

Complete sealing of receptacle assembly within seven days after removal of the original finish.

8.4.5

REFINISHING a. Determine if refinishing is required. (1) If drawing requires refinishing and specifies finish to apply then refinish in accordance with the drawing. (2) If drawing states refinishing is not required then do not apply finish. (3) If drawing has no indication if refinishing is required then apply all of the original finishes specified in the engineering drawing. b. Apply finishes to any surface areas that were previously cleaned and are not covered by sealant around the receptacle flange or fastener bolt heads/washers. OPTION: If an aluminum part included an anodized surface and the finish was removed during the surface preparation, manually apply chemical conversion coating on the remaining area of the faying surface without the finish. Refer to BAC5719, Type II or V manual application or BAC5626, Type II manual application. Then apply all other finishes called out on the engineering drawing. c. Apply all finishes within seven days after the original finish is removed.

8.5

TYPE IV: BONDING OF BACC65AB, BACC65AP, BACC65AV AND MTCPQKT RECEPTACLE CONNECTORS IN PRESSURIZED AREAS SURFACE PREPARATION a. Structure's surface that mates with receptacle flange: (1) If the structure's electrical faying surface is masked, carefully remove the mask.

8.5.1

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8.5.1

SURFACE PREPARATION (Continued) (2) Prepare the faying surface in accordance with Section 8.7. Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the receptacle flange is clean. See Figure 3 for area to be cleaned. (3) For aluminum receptacle mating surfaces cleaned using abrasive cleaning method CM1 (Section 8.7.1), manually apply Alodine 600 to the cleaned area in accordance with BAC5719, Type II, Class D or BAC5626, Type II, Class B. b. Structure's surface that mates with fastener bolt head: (1) If the structure's electrical faying surface is masked, carefully remove the mask. (2) Prepare the faying surface in accordance with Section 8.7. Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the fastener heads is clean. (3) For aluminum mating surfaces cleaned using abrasive cleaning method CM1 (Section 8.7.1), manually apply Alodine 600 to the cleaned area in accordance with BAC5719, Type II, Class D or BAC5626, Type II, Class B. c. Receptacle Surface Preparation: Clean both sides of receptacle flange using solvent cleaning method CM3 (Section 8.7.2).

8.5.2 8.5.2.1

RECEPTACLE INSTALLATION Installation of BACC65AB, BACC65AP and BACC65AV Receptacle Connectors a. b. c. d. e. f. g. h. Complete receptacle installation within 24 hours of surface preparation. Recleaning of the surfaces is required if the installation is not complete within 24 hours. Use fastener hardware specified on the engineering drawing. Align the mounting holes of the receptacle flange and the installation surface. Install each fastener from the side opposite to the receptacle flange. (See Figure 4). Tighten each fastener until the fastener head is touching the surface of the mounting structure. Tighten each fastener a small amount until the faying surface of the receptacle flange is fully flat against the installation surface. Torque each size 6 fastener to 12 to 15 inch-pounds. For the torque values of different size fasteners, refer to BAC5009.

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8.5.2.2

Installation of MTCPQKT Receptacle Connectors a. b. c. d. e. Complete receptacle installation within 24 hours of surface preparation. Recleaning of the surface is required if the installation is not complete within 24 hours. Use fastener hardware specified on the engineering drawing. Align the mounting holes of the receptacle flange and the installation surface. Install supplier jacking hardware on the opposite side of the receptacle flange and secure with screws from the back of the panel through the receptacle flange. Torque each fastener in accordance with the engineering drawing.

8.5.3

RESISTANCE TEST a. b. Measure the electrical resistance in accordance with Section 12. Verify that the resistance meets the requirements of Section 11. Complete resistance measurement within 24 hours of surface preparation.

8.5.4

REFINISHING a. Determine if refinishing is required. (1) If drawing requires refinishing and specifies finish to apply then refinish in accordance with the drawing. (2) If drawing states refinishing is not required then do not apply finish. (3) If drawing has no indication if refinishing is required then apply all of the original finishes specified in the engineering drawing. b. Apply finishes to any surface areas that were previously cleaned and are not covered by sealant around the receptacle flange or fastener bolt heads/washers. OPTION: If an aluminum part included an anodized surface and the finish was removed during the surface preparation, manually apply chemical conversion coating on the remaining area of the faying surface without the finish. Refer to BAC5719, Type II or V manual application or BAC5626, Type II manual application. Then apply all other finishes called out on the engineering drawing. c. Apply all finishes within seven days after the original finish is removed.

8.6

TYPE V: BONDING OF ARINC 404 AND 600 SERIES PLUG CONNECTORS IN PRESSURIZED AREAS SURFACE PREPARATION a. Structure's surface that mates with plug flange: (1) If the structure's electrical faying surface is masked, carefully remove the mask.

8.6.1

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8.6.1

SURFACE PREPARATION (Continued) (2) Prepare the faying surface in accordance with Section 8.7. Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the plug flange is clean. See Figure 5 for area to be cleaned. (3) For aluminum plug mating surfaces cleaned using abrasive cleaning method CM1 (Section 8.7.1), manually apply Alodine 600 to the cleaned area in accordance with BAC5719, Type II, Class D or BAC5626, Type II, Class B.

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8.6.1

SURFACE PREPARATION (Continued)

FIGURE 5 - SURFACE PREPARATION FOR ARINC CONNECTOR b. Structure's surface that mates with fastener bolt head: (1) If the structure's electrical faying surface is masked, carefully remove the mask.

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8.6.1

SURFACE PREPARATION (Continued) (2) Prepare the faying surface in accordance with Section 8.7. Clean a sufficient amount of the structure's surface to ensure the entire area to be covered by the fastener heads is clean. (3) For aluminum mating surfaces cleaned using abrasive cleaning method CM1 (Section 8.7.1), manually apply Alodine 600 to the cleaned area in accordance with BAC5719, Type II, Class D or BAC5626, Type II, Class B. c. Plug Surface Preparation: Clean both sides of plug flange using solvent cleaning method CM3 (Section 8.7.2).

8.6.2

GROUND BLOCK INSTALLATION TO CONNECTOR Install ground blocks to connector in accordance with the installation drawing.

8.6.3

RECEPTACLE INSTALLATION a. b. c. d. e. Complete receptacle installation within 24 hours of surface preparation. Recleaning of the surfaces is required if the installation is not complete within 24 hours. Use fastener hardware specified on the engineering drawing. Align the mounting holes of the plug flange and the installation surface. Install each fastener in accordance with Figure 5. Torque each fastener in accordance with the engineering drawing.

8.6.4

RESISTANCE TEST a. b. Measure the electrical resistance in accordance with Section 12. Verify that the resistance meets the requirements of Section 11. Complete resistance measurement within 24 hours of surface preparation.

8.6.5

REFINISHING a. Determine if refinishing is required. (1) If drawing requires refinishing and specifies finish to apply then refinish in accordance with the drawing. (2) If drawing states refinishing is not required then do not apply finish. (3) If drawing has no indication if refinishing is required then apply all of the original finishes specified in the engineering drawing.

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8.6.5

REFINISHING (Continued) b. Apply finishes to any surface areas that were previously cleaned and are not covered by sealant around the plug flange or fastener bolt heads/washers. OPTION: If an aluminum part included an anodized surface and the finish was removed during the surface preparation, manually apply chemical conversion coating on the remaining area of the faying surface without the finish. Refer to BAC5719, Type II or V manual application or BAC5626, Type II manual application. Then apply all other finishes called out on the engineering drawing. c. Apply all finishes within seven days after the original finish is removed.

8.7

GENERAL SURFACE PREPARATION a. Unless otherwise specified on the engineering drawing clean the surface using the applicable cleaning method specified in Table III and in accordance with the requirements of the selected cleaning method. See Table IV for obsolete and equivalent cleaning methods. TABLE III - SURFACE CLEANING METHODS

BONDING SURFACE MATERIAL FINISH Anodized as specified in BAC5019 Anodized as specified in BAC5022 Anodized as specified in BAC5632 Bare with or without grease, oil, CIC, oxide film contamination or other contaminants BAC5626 Class A chemical conversion coating CLEANING METHOD DESIGNATOR CM1 CM1 CM1 CM1 DESCRIPTION Abrasive Cleaning Abrasive Cleaning Abrasive Cleaning Abrasive Cleaning

b.

CM1 CM1 CM1 CM3

Abrasive Cleaning Abrasive Cleaning Abrasive Cleaning Solvent Cleaning

Aluminum

BAC5719 Class A through Class C chemical conversion coating Paint, primer, or enamel BAC5626 Class B chemical conversion coating with or without grease, oil, CIC, or other contaminants BAC5719 Class D chemical conversion coating with or without grease, oil, CIC, or other contaminants

CM3

Solvent Cleaning

Nickel Alloy 625 Composite

Bare with or without grease, oil, CIC, or other contaminants Nickel plated with or without grease, oil, CIC, or other contaminants Bare with or without grease, oil, CIC, or other contaminants Paint, primer, or enamel

CM3 CM3 CM3 CM1

Solvent Cleaning Solvent Cleaning Solvent Cleaning Abrasive Cleaning

Steel

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8.7

GENERAL SURFACE PREPARATION (Continued) TABLE III - SURFACE CLEANING METHODS (Continued)

BONDING SURFACE MATERIAL FINISH Cadmium plating with or without grease, oil, CIC, or other contaminants Bare with or without grease, oil, CIC, or other contaminants Paint, primer, or enamel CLEANING METHOD DESIGNATOR CM3 CM3 CM1 DESCRIPTION Solvent Cleaning Solvent Cleaning Abrasive Cleaning

Steel

Titanium

TABLE IV - OBSOLETE AND EQUIVALENT CLEANING METHODS OBSOLETE EQUIVALENT CLEANING METHOD CLEANING METHOD DESIGNATOR DESIGNATOR CM2 CM1 Type I CM1 Type II CM1 Type III CM1 Type IV CM1 Type V CM3 Type VII CM3 c. If the surface finish includes CIC applied on top of paint or primer, remove the CIC a minimum of 0.10 inch beyond the area where the paint and primer is removed. Use solvent cleaning method CM3 (Section 8.7.2) to remove CIC. Notify Liaison Engineering if the bonding surface/surface finish to be prepared is not specified in Table III and the engineering drawing does not specify the cleaning method to be used. Cleaning methods are to be used only when called out on the engineering drawing or when called out in a particular installation or bonding process of this specification. Use only stainless steel bonding brushes to abrasive clean inside fuel tanks, except for bare clad aluminum surfaces. For abrasive cleaning bare clad aluminum surfaces inside fuel tanks see Section 8.7.1.1 and Section 8.7.1.3. Do not allow the cleaned bonding surface to be contaminated. Remove all temporary protective coatings or masking from a cleaned bonding surface just prior to assembly of a bond. Reclean the mating bonding surfaces in accordance with solvent cleaning method CM3 (Section 8.7.2).

d.

e. f.

g. h.

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8.7.1 8.7.1.1

ABRASIVE CLEANING METHOD CM1 Abrasive Material a. b. c. d. Reuse abrasive material only on the same type of material on which it was used originally. Prepare the specified surface by hand, in accordance with BAC5748 Type II, Class 5. Maintain a circular motion with the abrasive material. On aluminum bonding surfaces, continue the operation until all surface finishes are removed and a bright aluminum bonding surface is visible throughout the required area. Remove a minimum amount of aluminum. On shot peened surfaces, aluminum material removal shall not exceed 10 percent of the nominal Almen A intensity (as described in BAC5730) or 0.001 inch, whichever is greater. Should the amount of material removed exceed these limits, the affected area shall be repeened in accordance with BAC5730 to the required intensity and coverage specified on the drawing. After shot peening, manually clean in accordance with BAC5744 or solvent clean in accordance with BAC5750. On steel and titanium surfaces, continue the operation until all surface finishes are removed and a clean bonding surface is visible throughout the required area. Perform a final cleaning in accordance with BAC5750.

e.

f. g. 8.7.1.2

Stainless Steel Rotary Brush a. b. Do not use carbon steel brushes of any kind to prepare electrical faying surfaces for electrical bonding. Use stainless steel wire brushes only on the same type of material on which they were originally used. Bonding brushes shall be color coded in accordance with Section 9.1.1b. Do not use stainless steel brushes on bare clad aluminum surfaces. Prepare the specified surface using a rotary stainless steel wire brush mounted in a manual or power drill motor. Maximum allowable power drill motor speed should be 1000 RPM. See Section 9.1 for bonding brush part numbers and control.

c.

CAUTION

d. e.

Use of power drill motor speeds above 1000 RPM will distort original flat contour of the metal surface limiting the actual surface area for bonding.

Apply the wire brush with light, intermittent pressure, keeping the cutting face parallel with the surface being prepared. To achieve the best surface finish on aluminum bonding surfaces, examine the results after each intermittent application of the brush. Continue the operation until all surface finishes are removed and a bright aluminum bonding surface is visible throughout the required area. Remove a minimum amount of aluminum. Surface roughness on the cleaned area shall be smooth and flat, maintaining the original surface contour of the metal.

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8.7.1.2

Stainless Steel Rotary Brush (Continued) OPTION: If variation in the thickness of anodic films causes difficulty in removing surface finishes with a wire brush, it is acceptable to use an abrasive disc (see Section 8.7.1.3) f. On shot peened surfaces, aluminum material removal shall not exceed 10 percent of the nominal Almen A intensity or 0.001 inch, whichever is greater. Should the amount of material removed exceed these limits, the affected area shall be repeened in accordance with BAC5730 to the required intensity and coverage specified on the drawing. After shot peening, manually clean in accordance with BAC5744 or solvent clean in accordance with BAC5750. On steel and titanium surfaces, continue the operation until all surface finishes are removed and a clean bonding surface is visible throughout the required area. Perform a final cleaning in accordance with BAC5750.

g. h. 8.7.1.3

Abrasive Disc a. b. Reuse abrasive sheets and abrasive discs only on the same type of material on which they were originally used. Prepare the surface using an abrasive disc (Section 9.1.3b.) fixed to a rotary mandrel (Section 9.1.3a.) mounted to a drill or using a non-piloted rotary abrasive disc tool (Section 9.1.4) mounted to a rotary tool. OPTION: Prepare the surface using an abrasive sheet in accordance with BAC5748 Type II, Class 5, fixed to a rotary mandrel (Section 9.1.3a.) mounted to a drill. c. d. Apply the abrasive disc with a light intermittent pressure, keeping the cutting face parallel to the surface being prepared. To achieve the best surface finish on aluminum bonding surfaces, continue the operation until all surface finishes are removed and a bright aluminum bonding surface is visible throughout the required area. Remove a minimum amount of aluminum. Surface roughness on the cleaned area shall be smooth and flat, maintaining the original surface contour of the metal. On shot peened surfaces, aluminum material removal shall not exceed 10 percent of the nominal Almen A intensity (as described in BAC5730) or 0.001 inch, whichever is greater. Should the amount of material removed exceed these limits, the affected area shall be repeened in accordance with BAC5730 to the required intensity and coverage specified on the drawing. After shot peening, manually clean in accordance with BAC5744 or solvent clean in accordance with BAC5750. On steel and titanium surfaces, continue the operation until all surface finishes are removed and a clean bonding surface is visible throughout the required area. When using Scotch-Brite pads, the surface may be wetted using some drops of water as a medium, at the mechanic's discretion. Do not use water with Roloc discs. Perform a final cleaning in accordance with BAC5750.

e.

f. g. h.

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8.7.2

SOLVENT CLEANING METHOD CM3 Perform a final solvent cleaning of the bonding surface in accordance with BAC5750 to remove any grease, oil, CIC or other contaminants. Ensure that the solvent chosen for cleaning is compatible with the surface being cleaned.

CAUTION

9 9.1

Use of the incompatible solvents may damage the bonding surface.

MAINTENANCE CONTROL CLEANING EQUIPMENT a. Use only surface preparation wire brushes/abrasive discs made from AISI (American Iron and Steel Institute); Type 302 (UNS30200) or Type 304 (UNS30400) stainless steel. Use acceptable piloted rotary bonding brushes listed in Section 9.1.1 or equivalent. Use acceptable non-piloted rotary bonding brush listed in Section 9.1.2. Use acceptable piloted rotary abrasive disc tools listed in Section 9.1.3 or equivalent. Use acceptable non-piloted rotary abrasive disc tool assembly listed in Section 9.1.4.

b. c. d. e. 9.1.1

PILOTED ROTARY BONDING BRUSH TOOLS a. Bonding brush tools are shown in Figure 6 through Figure 11. Dimensions shown in Table V through Table VII are for reference only.

FIGURE 6 - ST913K BONDING BRUSH

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9.1.1

PILOTED ROTARY BONDING BRUSH TOOLS (Continued)

FIGURE 7 - ST913K BONDING BRUSH PART NUMBER STRUCTURE TABLE V - ST913K BONDING BRUSH PART NUMBER SELECTION PILOT BRUSH DIAMETER DIAMETER PART NUMBER (INCH) (INCH) 0.094 0.50 ST913K-50-09 0.125 0.50 ST913K-50-12 0.156 0.50 ST913K-50-16 0.50 ST913K-50-19 0.188 0.75 ST913K-75-19 1.00 ST913K-100-19 0.240 0.34 ST913K-34-24 0.75 ST913K-75-25 0.250 1.00 ST913K-100-25 0.75 ST913K-75-31 0.313 1.00 ST913K-100-31 1.25 ST913K-125-75 0.749 1.50 ST913K-150-75

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9.1.1

PILOTED ROTARY BONDING BRUSH TOOLS (Continued)

FIGURE 8 - ST913KA BONDING BRUSH

FIGURE 9 - ST913KA BONDING BRUSH PART NUMBER STRUCTURE TABLE VI - ST913KA BONDING BRUSH PART NUMBER SELECTION PILOT DIAMETER (INCH) BRUSH DIAMETER (INCH)

TYPE I

COLOR

PART NUMBER ST913KA-2-094-1-1 ST913KA-2-094-2-1 ST913KA-2-094-1-2 ST913KA-2-094-2-2 ST913KA-5-094-1-1 ST913KA-5-094-2-1 ST913KA-5-094-1-2 BAC5117-1 Page 32

0.094

0.25 II I II

Blue Blue Blue

0.094

0.62

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9.1.1

PILOTED ROTARY BONDING BRUSH TOOLS (Continued) TABLE VI - ST913KA BONDING BRUSH PART NUMBER SELECTION (Continued) BRUSH DIAMETER (INCH) 0.62

PILOT DIAMETER (INCH) 0.094

TYPE II I

COLOR Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue

PART NUMBER ST913KA-5-094-2-2 ST913KA-2-109-1-1 ST913KA-2-109-2-1 ST913KA-2-109-1-2 ST913KA-2-109-2-2 ST913KA-2-125-1-1 ST913KA-2-125-2-1 ST913KA-2-125-1-2 ST913KA-2-125-2-2 ST913KA-3-125-1-1 ST913KA-3-125-2-1 ST913KA-3-125-1-2 ST913KA-3-125-2-2 ST913KA-5-125-1-1 ST913KA-5-125-2-1 ST913KA-5-125-1-2 ST913KA-5-125-2-2 ST913KA-5-156-1-1 ST913KA-5-156-2-1 ST913KA-5-156-1-2 ST913KA-5-156-2-2 ST913KA-5-188-1-1 ST913KA-5-188-2-1 ST913KA-5-188-1-2 ST913KA-5-188-2-2 ST913KA-4-218-1-1 ST913KA-4-218-2-1 ST913KA-4-218-1-2 ST913KA-4-218-2-2 ST913KA-5-218-1-1 ST913KA-5-218-2-1 ST913KA-5-218-1-2 ST913KA-5-218-2-2 ST913KA-5-250-1-1 ST913KA-5-250-2-1 ST913KA-5-250-1-2 ST913KA-5-250-2-2

0.109

0.31 II I 0.25 II I

0.125

0.37 II I 0.62 II I

0.156

0.62 II I

0.188

0.62 II I 0.50 II

0.218 I 0.62 II I 0.250 0.62 II

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9.1.1

PILOTED ROTARY BONDING BRUSH TOOLS (Continued) TABLE VI - ST913KA BONDING BRUSH PART NUMBER SELECTION (Continued) BRUSH DIAMETER (INCH)

PILOT DIAMETER (INCH)

TYPE I

COLOR

PART NUMBER ST913KA-8-250-1-1 ST913KA-8-250-2-1 ST913KA-8-250-1-2 ST913KA-8-250-2-2 ST913KA-6-312-1-1 ST913KA-6-312-2-1 ST913KA-6-312-1-2 ST913KA-6-312-2-2 ST913KA-5-320-1-1 ST913KA-5-320-2-1 ST913KA-5-320-1-2 ST913KA-5-320-2-2 ST913KA-6-500-1-1 ST913KA-6-500-2-1 ST913KA-6-500-1-2 ST913KA-6-500-2-2 ST913KA-8-500-1-1 ST913KA-8-500-2-1 ST913KA-8-500-1-2 ST913KA-8-500-2-2 ST913KA-12-875-1-1 ST913KA-12-875-2-1 ST913KA-12-875-1-2 ST913KA-12-875-2-2

0.250

1.00 II I

Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue

0.312

0.75 II I

0.320

0.62 II I 0.75 II

0.500 I 1.00 II I 0.875 1.50 II

FIGURE 10 - ST913KB BONDING BRUSH

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9.1.1

PILOTED ROTARY BONDING BRUSH TOOLS (Continued)

FIGURE 11 - ST913KB BONDING BRUSH PART NUMBER STRUCTURE TABLE VII - ST913KB BONDING BRUSH PART NUMBER SELECTION PILOT DIAMETER (INCH) BRUSH DIAMETER (INCH) 0.25 0.094 0.50 0.62 0.109 0.312 0.25 0.125 0.375 0.50 0.125 0.62 0.156 0.156 0.50 0.62 0.50 0.62 0.188 0.75 1.00 0.218 0.50

COLOR

PART NUMBER ST913KB-2-094-1 ST913KB-2-094-2 ST913KB-4-094-1 ST913KB-4-094-2 ST913KB-5-094-1 ST913KB-5-094-2 ST913KB-2-109-1 ST913KB-2-109-2 ST913KB-2-125-1 ST913KB-2-125-2 ST913KB-3-125-1 ST913KB-3-125-2 ST913KB-4-125-1 ST913KB-4-125-2 ST913KB-5-125-1 ST913KB-5-125-2 ST913KB-4-156-1 ST913KB-4-156-2 ST913KB-5-156-1 ST913KB-5-156-2 ST913KB-4-188-1 ST913KB-4-188-2 ST913KB-5-188-1 ST913KB-5-188-2 ST913KB-6-188-1 ST913KB-6-188-2 ST913KB-8-188-1 ST913KB-8-188-2 ST913KB-4-218-1 ST913KB-4-218-2

Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue

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9.1.1

PILOTED ROTARY BONDING BRUSH TOOLS (Continued) TABLE VII - ST913KB BONDING BRUSH PART NUMBER SELECTION (Continued) PILOT DIAMETER (INCH) BRUSH DIAMETER (INCH) 0.62 0.250 0.75 1.00 0.75 0.313 1.00 0.320 0.368 0.500 b. 0.62 1.00 0.75

COLOR

PART NUMBER ST913KB-5-250-1 ST913KB-5-250-2 ST913KB-6-250-1 ST913KB-6-250-2 ST913KB-8-250-1 ST913KB-8-250-2 ST913KB-6-313-1 ST913KB-6-313-2 ST913KB-8-313-1 ST913KB-8-313-2 ST913KB-5-320-1 ST913KB-5-320-2 ST913KB-8-368-1 ST913KB-8-368-2 ST913KB-6-500-1 ST913KB-6-500-2

Blue Blue Blue Blue Blue Blue Blue Blue

Color codes used with the bonding brushes are defined in Table VIII. TABLE VIII - BONDING BRUSH COLOR CODE BOND SURFACE MATERIAL Aluminum Steel or Titanium BONDING BRUSH COLOR CODE IDENTIFICATION None None Blue J7-42-5200

c. 9.1.2

Do not apply color code to shank or brush wires.

NON-PILOTED ROTARY BONDING BRUSH TOOL a. b. c. Non-piloted rotary bonding brush tool is shown in Figure 12 and Figure 13. Dimensions shown in Figure 12 are for reference only. Color codes used with the bonding brush are defined in Table VIII. Do not apply color codes to shank or brush wires.

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9.1.2

NON-PILOTED ROTARY BONDING BRUSH TOOL (Continued)

FIGURE 12 - ST913KD NON-PILOTED BONDING BRUSH

FIGURE 13 - ST913KD BONDING BRUSH PART NUMBER STRUCTURE 9.1.3 PILOTED ROTARY ABRASIVE DISC MANDREL TOOLS a. Abrasive disc mandrel tools are shown in Figure 14 and Figure 15. Dimensions shown in Table IX are for reference only. OPTION: It is acceptable to use a bonding brush as an abrasive disc mandrel.

FIGURE 14 - ST913M ABRASIVE DISC MANDREL

FIGURE 15 - ST913M ABRASIVE DISC MANDREL PART NUMBER STRUCTURE

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9.1.3

PILOTED ROTARY ABRASIVE DISC MANDREL TOOLS (Continued) TABLE IX - ST913M ABRASIVE DISC MANDREL PART NUMBER SELECTION PILOT DIAMETER (INCH) 0.094 0.125 0.156 0.187 0.218 0.250 0.279 0.312 0.438 b. MANDREL DIAMETER (INCH) 0.50 0.50 0.50 0.50 0.75 1.00 0.56 0.75 1.00 0.75 0.75 1.00 1.00

PART NUMBER ST913M-50-09 ST913M-50-12 ST913M-50-16 ST913M-50-19 ST913M-75-19 ST913M-100-19 ST913M-55-21 ST913M-75-25 ST913M-100-25 ST913M-75-27 ST913M-75-31 ST913M-100-31 ST913M-100-43

Abrasive disc used with abrasive disc mandrel is shown in Figure 16 and Figure 17. Accepted abrasive disc part numbers are listed in Table X. Dimensions shown in Table X are for reference only.

FIGURE 16 - ST913M-D ABRASIVE DISC

FIGURE 17 - ST913M-D ABRASIVE DISC PART NUMBER STRUCTURE

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9.1.3

PILOTED ROTARY ABRASIVE DISC MANDREL TOOLS (Continued) TABLE X - ST913M-D ABRASIVE DISC PART NUMBER SELECTION DISC DIAMETER (INCH) 0.500 DISC MATERIAL CODE 1 3 5 1 3 5 1 3 5 1 3 5 1 3 5 1 3 5 1 3 5 1 3 5 1 3 5 1 3 5 1 3 5 1 3 5 1 3 PART NUMBER ST913M-D1-50-09 ST913M-D3-50-09 ST913M-D5-50-09 ST913M-D1-50-12 ST913M-D3-50-12 ST913M-D5-50-12 ST913M-D1-50-16 ST913M-D3-50-16 ST913M-D5-50-16 ST913M-D1-50-19 ST913M-D3-50-19 ST913M-D5-50-19 ST913M-D1-75-19 ST913M-D3-75-19 ST913M-D5-75-19 ST913M-D1-100-19 ST913M-D3-100-19 ST913M-D5-100-19 ST913M-D1-55-21 ST913M-D3-55-21 ST913M-D5-55-21 ST913M-D1-75-25 ST913M-D3-75-25 ST913M-D5-75-25 ST913M-D1-100-25 ST913M-D3-100-25 ST913M-D5-100-25 ST913M-D1-75-27 ST913M-D3-75-27 ST913M-D5-75-27 ST913M-D1-75-31 ST913M-D3-75-31 ST913M-D5-75-31 ST913M-D1-100-31 ST913M-D3-100-31 ST913M-D5-100-31 ST913M-D1-100-43 ST913M-D3-100-43

PILOT DIAMETER (INCH) 0.094

0.125

0.500

0.156

0.500

0.187

0.500

0.750 0.187 1.00

0.218

0.560

0.750 0.250 1.00

0.279

0.750

0.750 0.312 1.00

0.438

1.00

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9.1.3

PILOTED ROTARY ABRASIVE DISC MANDREL TOOLS (Continued) TABLE X - ST913M-D ABRASIVE DISC PART NUMBER SELECTION (Continued) DISC DIAMETER (INCH) 1.00 1.00 DISC MATERIAL CODE 5 1 3 5 PART NUMBER ST913M-D5-100-43 ST913M-D1-100-60 ST913M-D3-100-60 ST913M-D5-100-60

PILOT DIAMETER (INCH) 0.438 0.600

9.1.4

NON-PILOTED ROTARY ABRASIVE DISC TOOL Non-piloted abrasive disc tool is show in Figure 18. Accepted non-piloted abrasive disc tool part numbers are listed in Table XI. Dimensions shown in Table XI are for reference only. The abrasive disc tool consists of a disc, disc pad and threaded shaft.

FIGURE 18 - 3M ROLOC SYSTEM TABLE XI - 3M SCOTCH-BRITE ROLOC SYSTEM PART NUMBERS DISC SIZE (INCH) MAX OPERATING SPEED (RPM) 30,000 25,000 18,000 12,000 MATERIAL GRADE ABRASIVE DISC DISC PAD PART PART NUMBER NUMBER THREADED SHAFT PART NUMBER (1/4 INCH) 45102 45102 45102 45102

1 2 3 4

Very Fine Very Fine Very Fine Very Fine

15391 05523 05530 12952

45101 45095 45092 45179

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9.2 9.2.1

TEST EQUIPMENT GENERAL a. Calibrate and certify all test equipment used for measurement of electrical resistance at intervals as deemed necessary by Boeing Quality Assurance and Calibration/ Certification Laboratory (or equivalent for outside sources). (1) All equipment shall be certified to an accuracy of ±5 percent of reading over the range specified by the test equipment manufacturer's specification. (2) For digital equipment, the accuracy shall be certified to ±5 percent, ±1 display count. (3) For M1 meter with serial number Bxxxxxxx, the accuracy shall be certified to ±5 percent, ±1 display count, ±3 micro-Ohms. b. All test probes used for any measurement of electrical resistance shall be supplied by the manufacturer of the meter being used or documented by a facilities ST tool drawing. The ST tool drawing will include a part number, parts list, and a statement saying that the probes will meet the requirements of BAC5117 for a specific model of meter. Test probes designed for use with a particular model of meter may be used with any meter of that model but not with any other model. Other leads can be used only if the test equipment has an external adjustment which enables the instrument to be nulled.

9.2.2

TEST EQUIPMENT USED IN AREAS SUBJECT TO COMBUSTION, FIRE AND EXPLOSIONS a. The test equipment to be used in Fire Hazard areas or Flammable leakage zones, shall be approved by Factory Mutual Approval Standard 3610 or qualified to Underwriter's Laboratory (UL) Standard 913, for Class I, Group A, atmosphere. The following meters are approved for use in areas subject to combustion, fire, and explosions as defined in UL Standard 913 for a Class I, Group A, atmosphere: (1) Avtron Manufacturing Incorporated - Model T477W Bonding Meter (2) BCD Electronics Ltd (a) Model M1 Bonding Meter with Axxxxxxx and DCxxxxxxx serial numbers. (For display resolution of 0.01 to 19,999 milliohms) (b) Model M1 Bonding Meter with only Bxxxxxxx serial number. (For display resolution of 0.001 to 19,999 milliohms)

b.

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9.2.3

TEST EQUIPMENT USED ON ELECTRO-EXPLOSIVE DEVICES a. The following test equipment is considered safe for measuring bonding resistances of electro-explosive devices, for example squibs detonators and primers, which can accidentally explode by application of electrical energy: Hewlett-Packard Company - Model 4328A-Option 001 (battery operated) b. Use this meter only when specified in engineering drawing.

9.2.4

TEST EQUIPMENT USED IN AREAS CONSIDERED AS NON-HAZARDOUS a. b. Any certified and calibrated meter and probe may be used for measuring electrical resistance in area considered as non-hazardous. All meters used for bonding resistance measurement shall have a certified measuring range exceeding the maximum allowable resistance for the measurement to be made. The meter used shall be sufficiently accurate to be able to distinguish acceptable from unacceptable resistance values.

10

QUALITY CONTROL a. Assure that the requirements of this specification are met by monitoring the process and examining the end items in accordance with established quality assurance provisions. Unless otherwise specified on the engineering drawing, Quality Assurance and Manufacturing may use a Boeing approved sampling plan for non-designated bonds to verify that the requirements of this specification are met. Sampling of designated bond requirements is not allowed. Verify that tools used to perform this process are maintained and certified, as required.

b.

c. d. 11

REQUIREMENTS a. b. c. Determine if receptacle installation is a designated bond or a non-designated bond. Refer to Figure 19. All designated bonds shall be tested to verify the specified resistance value. Refer to Figure 19. Sampling is not allowed. Non-designated bonds shall be tested to verify resistance as specified by the approved sampling plan. Refer to Figure 19 to find the resistance requirement. If an approved sampling plan does not exist then 100 percent testing is necessary.

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11

REQUIREMENTS (Continued)

FIGURE 19 - IDENTIFICATION OF TEST REQUIREMENTS 11.1 RESISTANCE OF RECEPTACLE BONDS a. The resistance between the receptacle flange and structure on which the receptacle is mounted shall not exceed the values specified in Table XII when tested in accordance with Section 12 and Section 12.1.

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11.1

RESISTANCE OF RECEPTACLE BONDS (Continued) TABLE XII - RESISTANCE OF RECEPTACLE TO STRUCTURE BONDS

RECEPTACLE MATERIAL Aluminum Steel Steel Nickel-Plated Composite Nickel-Plated Composite b.

STRUCTURE MATERIAL Aluminum Steel Aluminum Nickel-Plated Composite Aluminum

MAXIMUM RESISTANCE MILLIOHMS OHMS 1.0 2.0 1.0 3.0 2.5 0.001 0.002 0.001 0.003 0.0025

TEST METHOD Section 12.1 Section 12.1 Section 12.1 Section 12.1 Section 12.1

The resistance between backshell shield termination and structure on which the receptacle is mounted shall not exceed the values specified in Table XIII when tested in accordance with Section 12 and Section 12.2. Shield termination to structure measurements are not required for BACC65AB, BACC65AP, BACC65AV, ARINC 404, ARINC 600 and MTCPQKT receptacles. The resistance between ground block and structure on which the receptacle is mounted shall not exceed the value specified on Table XIII when tested in accordance wtih Section 12 and Section 12.3.

c. d.

TABLE XIII - RESISTANCE BETWEEN RECEPTACLE SHIELD TERMINATION AND STRUCTURE

SHIELD TERMINATION RECEPTACLE METHOD MATERIAL STRUCTURE MATERIAL MAXIMUM RESISTANCE MILLIOHMS 1.5 1.5 1.5 1.5 3.0 3.0 3.0 3.0 1.5 1.5 1.5 1.5 3.5 3.5 OHMS 0.0015 0.0015 0.0015 0.0015 0.003 0.003 0.003 0.003 0.0015 0.0015 0.0015 0.0015 0.0035 0.0035 TEST METHOD

Strain Relief Backshell Peripheral Backshell

Aluminum Aluminum

Aluminum Aluminum Aluminum Aluminum Steel Steel Steel Steel Aluminum Aluminum Aluminum Aluminum Nickel-Plated Composite Nickel-Plated Composite

Section 12.2 Section 12.2 Section 12.2 Section 12.4 Section 12.2 Section 12.2 Section 12.2 Section 12.4 Section 12.2 Section 12.2 Section 12.2 Section 12.4 Section 12.2 Section 12.2

Shield Terminator Band Aluminum Shield Sock Termination Aluminum Strain Relief Backshell Peripheral Backshell Steel Steel

Shield Terminator Band Steel Shield Sock Termination Steel Strain Relief Backshell Peripheral Backshell Steel Steel

Shield Terminator Band Steel Shield Sock Termination Steel Strain Relief Backshell Peripheral Backshell Nickel-Plated Composite Nickel-Plated Composite

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11.1

RESISTANCE OF RECEPTACLE BONDS (Continued)

TABLE XIII - RESISTANCE BETWEEN RECEPTACLE SHIELD TERMINATION AND STRUCTURE (Continued)

SHIELD TERMINATION RECEPTACLE METHOD MATERIAL STRUCTURE MATERIAL MAXIMUM RESISTANCE MILLIOHMS 3.5 3.5 3.0 3.0 3.0 3.0 1.5 OHMS 0.0035 0.0035 0.003 0.003 0.003 0.003 0.0015 TEST METHOD

Shield Terminator Band Nickel-Plated Composite Shield Sock Termination Nickel-Plated Composite Strain Relief Backshell Peripheral Backshell Nickel-Plated Composite Nickel-Plated Composite

Nickel-Plated Composite Nickel-Plated Composite Aluminum Aluminum Aluminum Aluminum Aluminum

Section 12.2 Section 12.4 Section 12.2 Section 12.2 Section 12.2 Section 12.4 Section 12.3

Shield Terminator Band Nickel-Plated Composite Shield Sock Termination Nickel-Plated Composite Metal Ground Block Aluminum

12

TEST METHODS a. b. c. Remove all installed connector plug(s) from equipment prior to measuring electrical bond resistance of AC/DC current return grounds. Do not use test currents in excess of 50 amperes when measuring the bond resistance of current return ground paths. Choose test equipment for measuring resistance as follows:

WARNING

Use of the wrong test equipment may cause fire or explosion.

(1) When measuring resistance in areas subject to combustion, fire and explosion, use only the test equipment specified in Section 9.2.2. Visually check test equipment prior to taking it to areas subject to combustion, fire and explosion. Verify that no physical damage, which might impair the vapor tightness of the instrument housing, has occurred. Do not use the test equipment listed in Section 9.2.2 on electro-explosive devices.

WARNING

(2) When measuring resistance of electro-explosive devices, use only the test equipment specified on the engineering drawing (see Section 9.2.3). Do not use the test equipment listed in Section 9.2.3 in areas subject to combustion, fire and explosion.

WARNING

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12

TEST METHODS (Continued) (3) When measuring resistance in areas considered as non-hazardous, use test equipment specified in Section 9.2.4. Do not use the test equipment listed in Section 9.2.4 in areas subject to combustion, fire and explosion or on electro-explosive devices.

WARNING

d.

Notify the local Fire and Safety Authority, or equivalent, and obtain permission before measuring bonding resistance in areas where pure oxygen may combine with any fossil fuel or combustible liquid. All meters used for bonding resistance measurement shall have a certified measuring range exceeding the maximum allowable resistance for the measurement to be made. The meter used shall be sufficiently accurate to be able to distinguish acceptable from unacceptable resistance values. For meters which have range selectors, readings shall be taken using the lowest range that contains the measurement to be made. The distance between test probes may exceed the values shown in a specific test method under the following condition. If the measured resistance at the increased distance exceeds the requirement, then retest with the probes placed at the distance shown in the applicable test method. Do not use test equipment on circuits which have power applied.

e.

f. g.

h. 12.1

RESISTANCE MEASUREMENT OF RECEPTACLE BONDS TO STRUCTURE a. b. Select the applicable test equipment in accordance with Section 12c. Place one ohmmeter probe on the receptacle flange or connector shell and the other probe on the conductive area of the adjacent structure in which the receptacle is installed. (1) See Figure 20 for typical circular receptacle installation. (2) See Figure 21 for typical rectangular receptacle installation. OPTION: Probes may be placed on the receptacle flange and primary structure. If the measured resistance exceeds the requirement, then retest with probes placed on the receptacle flange and on the structure in which it is installed.

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12.1

RESISTANCE MEASUREMENT OF RECEPTACLE BONDS TO STRUCTURE (Continued)

FIGURE 20 - TEST POINTS FOR CIRCULAR RECEPTACLE TO STRUCTURE BOND

FIGURE 21 - TEST POINTS FOR RECTANGULAR RECEPTACLE TO STRUCTURE BOND c. If the bonding surface of the structure is covered by a surface finish, remove a sufficient amount of the surface finish to allow the probe to contact the bonding surface. OPTION: Carefully pierce the surface finish with the probes to make contact with the bonding surface. d. e. Verify the resistance value shown on the ohmmeter is less than or equal to the resistance specified in Section 11. Any part from which the original finish has been removed for testing shall be refinished as follows: (1) Apply all finishes specified on the engineering drawing to any bonding surface areas uncovered during testing. OPTION: If an aluminum part included an anodized surface and the finish was removed during the surface preparation, manufally apply chemical conversion coating on the remaining area of the faying surface without the finish. Refer to BAC5719, Type II or V manual application or BAC5626, Type II manual application. Then apply all other finishes called out on the engineering drawing. (2) Apply all finishes within seven days after the original finish is removed.

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12.2

RESISTANCE MEASUREMENT OF SHIELD TERMINATION TO STRUCTURE a. b. Select the applicable test equipment in accordance with Section 12c. For shield terminations on a receptacle with a strain relief backshell, place the ohmmeter probes as shown in Figure 22.

FIGURE 22 - TEST POINTS FOR RECEPTACLE WITH A STRAIN RELIEF BACKSHELL c. For shield terminations on a receptacle with a peripheral backshell, place the ohmmeter probes as shown in Figure 23.

FIGURE 23 - TEST POINTS FOR RECEPTACLE WITH A PERIPHERAL BACKSHELL d. For shield terminations on a receptacle with a backshell and a shield terminator band, place the ohmmeter probes as shown in Figure 24.

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12.2

RESISTANCE MEASUREMENT OF SHIELD TERMINATION TO STRUCTURE (Continued)

FIGURE 24 - TEST POINTS FOR RECEPTACLE WITH A SHIELD TERMINATOR BAND OPTION: The structure probe may be placed on primary structure. If the measured resistance exceeds the requirement, then retest with the structure probe placed on the structure in which the receptacle is installed. e. If the bonding surface of the structure is covered by a surface finish, remove a sufficient amount of the surface finish to allow the probe to contact the conductive bonding surface. OPTION: Carefully pierce the surface finish with the probes to make contact with the bonding surface. f. g. Verify the resistance value shown on the ohmmeter is less than or equal to the resistance specified in Section 11. Any part from which the original finish has been removed for testing shall be refinished as follows: (1) Apply all finishes specified on the engineering drawing to any bonding surface areas uncovered during testing.

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12.2

RESISTANCE MEASUREMENT OF SHIELD TERMINATION TO STRUCTURE (Continued) OPTION: If an aluminum part included an anodized surface and the finish was removed during the surface preparation, manually apply chemical conversion coating on the remaining area of the faying surface without the finish. Refer to BAC5719, Type II or V manual application or BAC5626, Type II manual application. Then apply all other finishes called out on the engineering drawing. (2) Apply all finishes within seven days after the original finish is removed.

12.3

RESISTANCE MEASUREMENT OF A GROUND BLOCK TO STRUCTURE a. b. Select the applicable test equipment in accordance with Section 12c. For shield terminations on a receptacle with a ground block, place one ohmmeter probe on the ground block and the other probe on the conductive area of the adjacent structure in which the receptacle is installed. OPTION: The structure probe may be placed on primary structure. If the measured resistance exceeds the requirement, then retest with the structure probe placed on the structure in which the receptacle is installed. c. If the bonding surface of the structure is covered by a surface finish, remove a sufficient amount of the surface finish to allow the probe to contact the conductive bonding surface. OPTION: Carefully pierce the surface finish with the probes to make contact with the bonding surface. d. e. Verify the resistance value shown on the ohmmeter is less than or equal to the resistance specified in Section 11. Any part from which the original finish has been removed for testing shall be refinished as follows: (1) Apply all finishes specified on the engineering drawing to any bonding surface areas uncovered during testing. OPTION: If an aluminum part included an anodized surface and the finish was removed during the surface preparation, manually apply chemical conversion coating on the remaining area of the faying surface without the finish. Refer to BAC5719, Type II or V manual application or BAC5626, Type II manual application. Then apply all other finishes called out on the engineering drawing. (2) Apply all finishes within seven days after the original finish is removed.

12.4

RESISTANCE MEASUREMENT OF SHIELD SOCK TERMINATION TO STRUCTURE a. Select the applicable test equipment in accordance with Section 12c. BAC5117-1 Page 50

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12.4

RESISTANCE MEASUREMENT OF SHIELD SOCK TERMINATION TO STRUCTURE (Continued) b. For shield terminations on a receptacle with a shield sock, place one ohmmeter probe on the shield sock and the other probe on the conductive area of the adjacent structure in which the receptacle is installed. NOTE: When measuring from the shield sock lay the probes on the shield sock. Do not poke the probes through the shield sock.

OPTION: The structure probe may be placed on primary structure. If the measured resistance exceeds the requirement, then retest with the structure probe placed on the structure in which the receptacle is installed. c. If the bonding surface of the structure is covered by a surface finish, remove a sufficient amount of the surface finish to allow the probe to contact the conductive bonding surface. OPTION: Carefully pierce the surface finish with the probes to make contact with the bonding surface. d. e. Verify the resistance value shown on the ohmmeter is less than or equal to the resistance specified in Section 11. Any part from which the original finish has been removed for testing shall be refinished as follows: (1) Apply all finishes specified on the engineering drawing to any bonding surface areas uncovered during testing. OPTION: If an aluminum part included an anodized surface and the finish was removed during the surface preparation, manually apply chemical conversion coating on the remaining area of the faying surface without the finish. Refer to BAC5719, Type II or V manual application or BAC5626, Type II manual application. Then apply all other finishes called out on the engineering drawing. (2) Apply all finishes within seven days after the original finish is removed. 13 QUALIFICATION Not applicable to this specification.

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