Boeing ASB 777-57A0050: Revision 6, text

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Commercial Airplanes 777 Service Bulletin ALERT Number: 777-57A0050 Original Issue: January 26, 2006 Revision 6: August 18, 2021 ATA System: 5710 SUBJECT: WINGS - Center and Outer Wings - Wire Bundle Teflon sleeve Installation and Fastener Cap Sealing for Fuel Tank Wiring Hot Short Protection Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.

9E991ECCN:

Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company.

Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.

Original Issue: January 26, 2006 777-57A0050Revision 6: August 18, 2021 1 of 857

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Original Issue: January 26, 2006 777-57A0050Revision 6: August 18, 2021 2 of 857 BOEING SERVICE BULLETIN 777-57A0050

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Table of Contents Revision Transmittal Sheet ........................................... 1 1 S u m m a r y ..................................................... 1 7

1. PLANNING INFORMATION ........................................ 2 5 A . E f f e c t i v i t y ............................................... 2 5

1. Airplanes ............................................ 2 5 2 . S p a r e s A f f e c t e d ........................................ 5 8 B. Concurrent Requirements ...................................... 5 8 C. Reason ................................................ 5 8 D . D e s c r i p t i o n .............................................. 6 0 E. Compliance .............................................. 6 9 F . A p p r o v a l ............................................... 7 0 G. Manpower .............................................. 7 1 H. Weight and Balance Changes ................................... 1 0 2 I . E l e c t r i c a l L o a d D a t a ........................................ 1 0 5 J . R e f e r e n c e s ............................................. 1 0 5

1. Existing Data: ......................................... 1 0 5

2. Data Supplied with this Service Bulletin: .......................... 1 0 6

3. Installation Drawings Used in the Preparation of this Service Bulletin: .......... 1 0 6 K. Publications Affected ........................................ 1 0 6 L. Interchangeability and Intermixability of Parts ........................... 1 0 6 M. Software Accomplishment Summary ............................... 1 0 6

2. MATERIAL INFORMATION ....................................... 1 0 7 A. Material - Price and Availability .................................. 1 0 7 B. Industry Support Information .................................... 1 0 7 C. Parts Necessary for Each Airplane ................................ 1 0 7 1 . K i t s / P a r t s : ........................................... 1 0 7

2. Parts and Materials Supplied by the Operator: ....................... 1 0 9

3. Parts Modified and Reidentified: ............................... 1 1 2

4. Parts Removed and Not Replaced: ............................. 1 1 2 D. Parts Necessary to Change Spares ................................ 1 1 2 E. Special Tooling - Price and Availability .............................. 1 1 3 F. Special Tooling Necessary to do this Service Bulletin ...................... 1 1 3

3. ACCOMPLISHMENT INSTRUCTIONS ................................. 1 1 5 A. GENERAL INFORMATION .................................... 1 1 5 B. WORK INSTRUCTIONS ...................................... 1 1 6 FIGURE 1: SLEEVING INSTALLATION FOR 1 INCH OR SMALLER DIAMETER WIRE BUNDLE . . 158 FIGURE 2: SLEEVING INSTALLATION FOR LARGER THAN 1 INCH DIAMETER WIRE BUNDLE . 161 FIGURE 3: WING REAR SPAR ACCESS PANEL REMOVAL/INSTALLATION ............ 1 6 4 FIGURE 4: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1-2, 4] . 167 FIGURE 5: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 3] .... 1 7 3 FIGURE 6: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1-2, 4] . 179 FIGURE 7: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 3] . . . 187 FIGURE 8: LEADING EDGE FIXED PANEL REMOVAL/INSTALLATION ............... 1 9 5 FIGURE 9: LEFT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1-4] ................................................. 2 0 0 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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FIGURE 10: LEFT WING OUTBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1 - 2 , 4 ] ............................................. 2 0 7 FIGURE 11: LEFT WING OUTBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 3 ] ................................................ 2 0 8 FIGURE 12: RIGHT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1 - 4 ] ............................................... 2 1 0 FIGURE 13: RIGHT WING OUTBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1 - 2 , 4 ] ............................................. 2 1 6 FIGURE 14: RIGHT WING OUTBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 3 ] ................................................ 2 1 8 FIGURE 15: WING-TO-BODY FAIRING / ECS BAY ACCESS PANEL REMOVAL/INSTALLATION . . 220 FIGURE 16: LEFT ECS BAY WIRE BUNDLE SLEEVING INSTALLATION [Group 1-4] ........ 2 2 2 FIGURE 17: RIGHT ECS BAY WIRE BUNDLE SLEEVING INSTALLATION [Group 1-4] ........ 2 2 5 FIGURE 18: LEFT FORWARD WING -TO-BODY FAIRING WIRE BUNDLE SLEEVING INSTALLATION [Group 1-4] .......................................... 2 2 9 FIGURE 19: RIGHT FORWARD WING-TO-BODY FAIRING WIRE BUNDLE SLEEVING INSTALLATION [Group 1-4] .......................................... 2 3 1 F I G U R E 2 0 : D E L E T E D........................................... 2 3 4 FIGURE 21: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 2, Configuration 1 , 3 - 5 ] ............................................. 2 3 5 FIGURE 22: FUEL TANK FASTENER CAP SEAL APPLICATION .................... 2 3 9 FIGURE 23: LEFT CENTER FUEL CHEEK TANK FASTENER CAP SEALING [Group 1-2, Configuration 1;

Group 2, Configuration 2; Group 3, Configuration 1-2; Group 4, Configuration 1-2] .... 2 4 1 FIGURE 24: RIGHT CENTER FUEL CHEEK TANK FASTENER CAP SEALING [Group 1-2, Configuration 1; Group 2, Configuration 2; Group 3, Configuration 1-2; Group 4, Configuration 1-2] . . 245 FIGURE 25: BODY CENTER FUEL TANK FASTENER CAP SEALING [Group 2, Configuration 1-2; Group 3, Configuration 1-2; Group 4, Configuration 1-2] ...................... 2 4 9 FIGURE 26: LEFT MAIN FUEL TANK REAR SPAR FASTENER CAP SEALING [Group 1-2, Configuration 1; Group 2, Configuration 2; Group 3, Configuration 1-2; Group 4, Configuration 1-2] . . 256 FIGURE 27: LEFT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING [Group 1-2, Configuration 1; Group 2, Configuration 2; Group 4, Configuration 1-2] .................. 2 6 1 FIGURE 28: LEFT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING [Group 3, Configuration 1 - 2 ] ............................................... 2 7 5 FIGURE 29: RIGHT MAIN FUEL TANK REAR SPAR FASTENER CAP SEALING [Group 1-2, Configuration 1; Group 2, Configuration 2; Group 3, Configuration 1-2; Group 4, Configuration 1-2] . . 289 FIGURE 30: RIGHT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING [Group 1-2, Configuration 1; Group 2, Configuration 2; Group 4, Configuration 1-2] .................. 2 9 4 FIGURE 31: RIGHT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING [Group 3, Configuration 1 - 2 ] ............................................... 3 0 8 FIGURE 32: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 2, Configuration 2 - 5 ] ............................................... 3 2 2 FIGURE 33: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 3, Configuration 1, 3-5; Group 4, Configuration 1, 3-5] ............................ 3 2 6 FIGURE 34: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 3, Configuration 2-5; Group 4, Configuration 2-5] ............................... 3 3 0 FIGURE 35: LEFT ECS BAY WIRE BUNDLE SLEEVING INSPECTION [Group 8-12, 17, 20, Configuration 1; Group 25; Group 31, 34, 39, 42-43, 51-57, 69, Configuration 1] ............. 3 3 4 FIGURE 36: RIGHT ECS BAY WIRE BUNDLE SLEEVING INSPECTION [Group 8-12, 17, 20, 22, 25, 42-43, 51-57, Configuration 1] .................................... 3 3 7 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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FIGURE 37: LEFT ECS BAY WIRE BUNDLE SLEEVING INSTALLATION [Group 8-12, 17, 20, Configuration 1; Group 25; Group 31, 34, 39, 42-43, 51-57, 69, Configuration 1] ............. 3 4 1 FIGURE 38: RIGHT ECS BAY WIRE BUNDLE SLEEVING INSTALLATION [Group 8-12, 17, 20, 22, 25, 42-43, 51-57, Configuration 1] ................................ 3 4 4 FIGURE 39: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 9-10, 51, Configuration 1] ........................................ 3 4 8 FIGURE 40: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 17, Configuration 1 ] ................................................ 3 5 1 FIGURE 41: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 11, 42, 52, Configuration 1] ........................................ 3 5 5 FIGURE 42: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 15, 18, 22, 26, 3 1 - 3 2 , 3 4 , 3 7 , 3 9 , 4 1 , 6 3 - 6 5 , 6 9 , C o n f i g u r a t i o n 1 ] ...................... 3 5 9 FIGURE 43: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 13, 24, Configuration 1 ] ................................................ 3 6 3 FIGURE 44: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 16, 19, 21, 25, 27, 30, 33, 36, 38, 66-68, Configuration 1] ............................ 3 6 7 FIGURE 45: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 14, 58-62, Configuration 1] ........................................ 3 7 1 FIGURE 46: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 6, Configuration 1 ] ................................................ 3 7 6 FIGURE 47: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 12, 23, 43, 53-57, Configuration 1] ........................................ 3 7 9 FIGURE 48: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 35, 70, Configuration 1 ] ................................................ 3 8 4 FIGURE 49: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 7, 29, 49-50, Configuration 1] ........................................ 3 8 7 FIGURE 50: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 9-11, 42, 51-52, Configuration 1] ........................................ 3 9 1 FIGURE 51: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 12, 20, 23, 25, 27, 43, 53-57, 68, Configuration 1] .............................. 3 9 4 FIGURE 52: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 40, Configuration 1 ] ................................................ 3 9 8 FIGURE 53: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 36, 38, Configuration 1] ........................................ 4 0 1 FIGURE 54: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 35, 70, Configuration 1] ........................................ 4 0 5 FIGURE 55: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 34, 37, 39, 41, 69, Configuration 1] ...................................... 4 0 9 FIGURE 56: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 14, 16, 24, 28-29, 58-62, 66, Configuration 1] .................................. 4 1 3 FIGURE 57: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 5, 15, 18, 21-22, 26, 30-33, 63-65, Configuration 1] .............................. 4 1 7 F I G U R E 5 8 : D E L E T E D........................................... 4 2 1 FIGURE 59: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 9-10, 51, Configuration 1] ........................................ 4 2 2 FIGURE 60: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 17, Configuration 1 ] ................................................ 4 2 5 FIGURE 61: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 11, 42, 52, Configuration 1] ........................................ 4 2 9 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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FIGURE 62: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 15, 18, 22, 26, 31-32, 34, 37, 39, 41, 63-65, 69, Configuration 1] ...................... 4 3 3 FIGURE 63: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 13, 24, Configuration 1] ........................................ 4 3 7 FIGURE 64: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 16, 19, 21, 25, 27, 30, 33, 36, 38, 66-68, Configuration 1] .......................... 4 4 1 FIGURE 65: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 14, 58-62, Configuration 1] ........................................ 4 4 5 FIGURE 66: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 6, Configuration 1 ] ................................................ 4 5 0 FIGURE 67: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 12, 23, 43, 53-57, Configuration 1] ........................................ 4 5 3 FIGURE 68: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 35, 70, Configuration 1] ........................................ 4 5 8 FIGURE 69: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 7, 29, 49-50, Configuration 1] ........................................ 4 6 1 FIGURE 70: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 9-11, 42, 51-52, Configuration 1] ........................................ 4 6 5 FIGURE 71: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 12, 20, 23, 25, 27, 43, 53-57, 68, Configuration 1] .............................. 4 6 8 FIGURE 72: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 40, Configuration 1 ] ................................................ 4 7 2 FIGURE 73: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 36, 38, Configuration 1] ........................................ 4 7 5 FIGURE 74: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 35, 70, Configuration 1] ........................................ 4 7 9 FIGURE 75: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 34, 37, 39, 41, 69, Configuration 1] ...................................... 4 8 2 FIGURE 76: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 14, 16, 24, 28-29, 58-62, 66, Configuration 1] .............................. 4 8 6 FIGURE 77: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 5, 15, 18, 21-22, 26, 30-33, 63-65, Configuration 1] .............................. 4 9 0 F I G U R E 7 8 : D E L E T E D........................................... 4 9 4 FIGURE 79: RIGHT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 32-34, 36, 69, Configuration 1] .................................... 4 9 5 FIGURE 80: RIGHT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 32-34, 36, 69, Configuration 1] ................................ 4 9 7 FIGURE 81: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSPECTION [Group 12, 18, 20-21, 23, 25, 27, 30, 33, 36, 38, 40, 43-45, 53-57, 68, 71, Configuration 1] ........... 4 9 9 FIGURE 82: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 12, 18, 20-21, 23, 25, 27, 30, 33, 36, 38, 40, 43-45, 53-57, 68, 71, Configuration 1] ........... 5 0 2 FIGURE 83: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 1, Configuration 2-4; Group 2, Configuration 3-5; Group 4, Configuration 3-5] ................ 5 0 5 FIGURE 84: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 3, Configuration 3 - 5 ] ............................................... 5 0 9 FIGURE 85: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1, Configuration 2-4; Group 2, Configuration 3-5; Group 4, Configuration 3-5] ................ 5 1 2 FIGURE 86: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 3, Configuration 3 - 5 ] ............................................... 5 1 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

Original Issue: January 26, 2006 777-57A0050Revision 6: August 18, 2021 6 of 857 BOEING SERVICE BULLETIN 777-57A0050

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FIGURE 87: RIGHT WING REAR SPAR WIRE BUNDLE CLAMP INSPECTION [Group 1, Configuration 2-4;

Group 2, Configuration 3-5; Group 3, Configuration 3-5; Group 4, Configuration 3-5] . . . 519 FIGURE 88: RIGHT WING REAR SPAR WIRE BUNDLE CLAMP REPLACEMENT [Group 1, Configuration 2-4; Group 2, Configuration 3-5; Group 3, Configuration 3-5; Group 4, Configuration 3-5] . 522 FIGURE 89: RIGHT MAIN FUEL TANK REAR SPAR FASTENER CAP SEAL INSPECTION [Group 1, Configuration 2-4; Group 2, Configuration 3-5; Group 3, Configuration 3-5; Group 4, Configuration 3 - 5 ] ............................................... 5 2 5 FIGURE 90: RIGHT MAIN FUEL TANK REAR SPAR FASTENER CAP SEALING [Group 1, Configuration 2-4; Group 2, Configuration 3-5; Group 3, Configuration 3-5; Group 4, Configuration 3-5] . 527 FIGURE 91: WIRE BUNDLE SLEEVING INSTALLATION FOR LARGER THAN 1 INCH DIAMETER WIRE BUNDLE - INSPECTION [Group 1, Configuration 2-4; Group 2, Configuration 3-5; Group 3, Configuration 3-5; Group 4, Configuration 3-5] ....................... 5 2 9 F I G U R E 9 2 : D E L E T E D........................................... 5 3 1 F I G U R E 9 3 : D E L E T E D........................................... 5 3 2 FIGURE 94: RIGHT MAIN FUEL TANK REAR SPAR FASTENER CAP SEAL INSPECTION [Group 1, Configuration 2; Group 2-4, Configuration 3] ........................ 5 3 3 FIGURE 95: RIGHT MAIN FUEL TANK REAR SPAR FASTENER CAP SEALING [Group 1, Configuration 2; Group 2-4, Configuration 3] ................................ 5 3 5 FIGURE 96: LEFT MAIN FUEL TANK REAR SPAR FASTENER CAP SEAL INSPECTION [Group 1, Configuration 2-3; Group 2, Configuration 3-4; Group 3, Configuration 3-4; Group 4, Configuration 3 - 4 ] ............................................... 5 3 7 FIGURE 97: LEFT MAIN FUEL TANK REAR SPAR FASTENER CAP SEALING [Group 1, Configuration 2-3;

Group 2, Configuration 3-4; Group 3, Configuration 3-4; Group 4, Configuration 3-4] . . . 540 FIGURE 98: RIGHT MAIN FUEL TANK REAR SPAR FASTENER CAP SEAL INSPECTION [Group 1, Configuration 2-3; Group 2, Configuration 3-4; Group 3, Configuration 3-4; Group 4, Configuration 3 - 4 ] ............................................... 5 4 3 FIGURE 99: RIGHT MAIN FUEL TANK REAR SPAR FASTENER CAP SEALING [Group 1, Configuration 2-3; Group 2, Configuration 3-4; Group 3, Configuration 3-4; Group 4, Configuration 3-4] . 546 FIGURE 100: DELETED ........................................... 5 4 9 FIGURE 101: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 20, 40, 45; Group 46, 72-73, Configuration 1] .................................. 5 5 0 FIGURE 102: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 24] .... 5 5 3 FIGURE 103: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 28, 35; Group 47, Configuration 1; Group 70; Group 74-79, Configuration 1] ................. 5 5 6 FIGURE 104: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 20, 40, 45; Group 46, 72-73, Configuration 1] .................................. 5 6 0 FIGURE 105: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 24] . . . 563 FIGURE 106: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 28, 35; Group 47, Configuration 1; Group 70; Group 74-79, Configuration 1] ............... 5 6 6 FIGURE 107: DELETED ........................................... 5 7 0 FIGURE 108: LEFT FORWARD WING-TO-BODY FAIRING WIRE BUNDLE SLEEVING INSTALLATION [Group 1-20, 42-43, 49-61, 63, 66-67] ............................ 5 7 1 FIGURE 109: LEFT FORWARD WING-TO-BODY FAIRING WIRE BUNDLE SLEEVING INSTALLATION [Group 21-41, 44-47, 62, 64-65, 68-70, 72, 74-75] ..................... 5 7 4 FIGURE 110: LEFT FORWARD WING-TO-BODY FAIRING WIRE BUNDLE SLEEVING INSPECTION [Group 4 8 , 7 1 , 7 3 , 7 6 - 8 3 ] ....................................... 5 7 6 FIGURE 111: LEFT FORWARD WING-TO-BODY FAIRING WIRE BUNDLE SLEEVING INSTALLATION [Group 48, 71, 73, 76-83] ................................... 5 7 8 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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FIGURE 112: RIGHT FORWARD WING-TO-BODY FAIRING WIRE BUNDLE SLEEVING INSTALLATION [Group 1-20, 42-43, 49-61, 63, 66-67] ............................ 5 8 0 FIGURE 113: RIGHT FORWARD WING-TO-BODY FAIRING WIRE BUNDLE SLEEVING INSTALLATION [Group 21-41, 44-47, 62, 64-65, 68-70, 72, 74-75] ..................... 5 8 3 FIGURE 114: RIGHT FORWARD WING-TO-BODY FAIRING WIRE BUNDLE SLEEVING INSPECTION [Group 4 8 , 7 1 , 7 3 , 7 6 - 8 3 ] ....................................... 5 8 5 FIGURE 115: RIGHT FORWARD WING-TO-BODY FAIRING WIRE BUNDLE SLEEVING INSTALLATION [Group 48, 71, 73, 76-83] ................................... 5 8 7 FIGURE 116: LEFT SIDE REAR SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 1-47, 4 9 - 7 0 , 7 2 , 7 4 - 7 5 ] ....................................... 5 9 0 FIGURE 117: LEFT SIDE REAR SPAR BULKHEAD WIRE BUNDLE SLEEVING INSPECTION [Group 48, 7 1 , 7 3 , 7 6 - 8 3 ] ......................................... 5 9 3 FIGURE 118: LEFT SIDE REAR SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 48, 7 1 , 7 3 , 7 6 - 8 3 ] ......................................... 5 9 6 FIGURE 119: RIGHT SIDE REAR SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 1 - 4 7 , 4 9 - 7 0 , 7 2 , 7 4 - 7 5 ] .................................... 5 9 9 FIGURE 120: RIGHT SIDE REAR SPAR BULKHEAD WIRE BUNDLE SLEEVING INSPECTION [Group 48, 7 1 , 7 3 , 7 6 - 8 3 ] ......................................... 6 0 2 FIGURE 121: RIGHT SIDE REAR SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 4 8 , 7 1 , 7 3 , 7 6 - 8 3 ] ....................................... 6 0 5 FIGURE 122: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 1-4] . . 608 FIGURE 123: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 5] . . . 612 FIGURE 124: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 6-7, 10-11, 42] ................................................. 6 1 6 FIGURE 125: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 49] . . 620 FIGURE 126: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 13-14, 16, 19, 2 4 , 2 8 - 2 9 , 3 5 , 4 7 , 5 0 , 5 4 - 5 5 , 5 8 , 6 0 , 6 2 , 7 7 - 7 8 , 8 0 ] ..................... 6 2 4 FIGURE 127: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 8] . . . 627 FIGURE 128: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 9, 51-52] . 631 FIGURE 129: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 12, 15, 17-18, 2 0 , 2 3 , 2 5 - 2 7 , 3 7 , 4 0 - 4 1 , 4 3 , 4 5 - 4 6 , 5 3 , 5 6 , 6 4 , 7 3 , 8 3 ] ................... 6 3 5 FIGURE 130: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 57, 68] . 638 FIGURE 131: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 59, 61, 66-67, 7 0 , 7 5 - 7 6 , 7 9 , 8 1 ] ....................................... 6 4 2 FIGURE 132: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 22, 31-32, 34, 3 9 , 6 3 , 6 5 ] ........................................... 6 4 5 FIGURE 133: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 69, 72] . 648 FIGURE 134: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 74] . . 652 FIGURE 135: RIGHT ECS BAY WIRE BUNDLE SLEEVING INSPECTION [Group 22, 31, 34, 39, 46, 69, 72] ................................................. 6 5 5 FIGURE 136: RIGHT ECS BAY WIRE BUNDLE SLEEVING INSTALLATION [Group 22, 31, 34, 39, 46, 69, 7 2 ] ............................................... 6 5 8 FIGURE 137: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSPECTION [Group 8] .... 6 6 1 FIGURE 138: FRONT SPAR BULKHEAD WIRE BUNDLE SLEEVING INSTALLATION [Group 8] . . . 665 FIGURE 139: LEFT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1-4] ................................................. 6 6 9 FIGURE 140: LEFT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 5 - 1 1 , 1 3 , 4 2 - 4 3 , 4 9 - 5 4 , 5 8 ] .................................. 6 7 3 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

Original Issue: January 26, 2006 777-57A0050Revision 6: August 18, 2021 8 of 857 BOEING SERVICE BULLETIN 777-57A0050

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FIGURE 141: LEFT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 12, 1 4 - 4 1 , 4 4 - 4 7 , 5 5 - 5 7 , 5 9 - 7 0 , 7 2 , 7 4 - 7 5 ] ............................ 6 7 7 FIGURE 142: LEFT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 48, 7 1 , 7 3 , 7 6 - 8 3 ] ......................................... 6 8 1 FIGURE 143: LEFT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 48, 7 1 , 7 3 , 7 6 - 8 3 ] ......................................... 6 8 5 FIGURE 144: RIGHT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1 - 3 1 , 3 3 - 4 7 , 4 9 - 7 0 , 7 2 , 7 4 - 7 5 ] ................................ 6 8 9 FIGURE 145: RIGHT WING INBOARD AND OUTBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 32] .................................. 6 9 2 FIGURE 146: RIGHT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 48, 7 1 , 7 3 , 7 6 - 8 3 ] ......................................... 6 9 5 FIGURE 147: RIGHT WING INBOARD FRONT SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 4 8 , 7 1 , 7 3 , 7 6 - 8 3 ] ....................................... 6 9 8 FIGURE 148: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 6, 8] . . . 701 FIGURE 149: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 7, 49-50] . 704 FIGURE 150: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 9-10, 51] . 707 FIGURE 151: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 11, 42, 52] . 710 FIGURE 152: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 12, 20, 23, 25, 2 7 , 4 3 , 5 3 - 5 5 , 5 7 , 6 8 ] ..................................... 7 1 4 FIGURE 153: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 14, 16, 19, 58-59, 6 6 - 6 7 ] ............................................. 7 1 9 FIGURE 154: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 15, 18, 21-22, 2 6 , 3 0 - 3 4 , 3 7 , 3 9 , 4 1 , 4 6 , 6 3 - 6 5 , 6 9 , 7 2 - 7 3 ] ......................... 7 2 4 FIGURE 155: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 17, 56] . 728 FIGURE 156: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 24, 28, 35, 47, 7 0 , 7 4 - 7 7 ] ........................................... 7 3 3 FIGURE 157: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 13, 40, 45] . 737 FIGURE 158: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 60-62] . 741 FIGURE 159: LEFT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 78-79] . 746 FIGURE 160: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 1-4, 8, 17, 36, 3 8 , 4 4 ] ............................................. 7 4 9 FIGURE 161: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 5, 15, 18, 21-22, 2 6 , 3 0 - 3 3 , 6 3 - 6 5 ] ....................................... 7 5 2 FIGURE 162: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 6, 13, 35, 47, 7 0 , 7 4 - 7 5 ] ........................................... 7 5 7 FIGURE 163: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 7, 14, 16, 19, 2 4 , 2 8 - 2 9 , 4 9 - 5 0 , 5 8 - 6 2 , 6 6 - 6 7 ] ............................... 7 6 1 FIGURE 164: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 9-11, 40, 42, 4 5 , 5 1 - 5 2 ] ........................................... 7 6 6 FIGURE 165: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 12, 20, 23, 25, 2 7 , 4 3 , 5 3 - 5 7 , 6 8 ] ....................................... 7 7 0 FIGURE 166: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 34, 37, 39, 41, 4 6 , 6 9 , 7 2 ] ........................................... 7 7 5 FIGURE 167: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 73] . . 780 FIGURE 168: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSPECTION [Group 48, 71, 73, 76-83] ................................................. 7 8 4 FIGURE 169: RIGHT WING REAR SPAR WIRE BUNDLE SLEEVING INSTALLATION [Group 48, 71, 73, 7 6 - 8 3 ] ............................................. 7 8 7 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

Original Issue: January 26, 2006 777-57A0050Revision 6: August 18, 2021 9 of 857 BOEING SERVICE BULLETIN 777-57A0050

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FIGURE 170: BODY CENTER FUEL TANK FASTENER CAP SEALING INSPECTION ......... 7 9 0 FIGURE 171: BODY CENTER FUEL TANK FASTENER CAP SEALING ................. 7 9 5 FIGURE 172: LEFT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING [Group 1-11, 13, 42-43, 4 9 - 5 4 , 5 6 , 5 8 ] ......................................... 8 0 0 FIGURE 173: LEFT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING INSPECTION [Group 1-4] ................................................. 8 0 3 FIGURE 174: LEFT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING [Group 1-4] .... 8 0 6 FIGURE 175: LEFT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING INSPECTION [Group 5-11, 1 3 , 4 2 - 4 3 , 4 9 - 5 4 , 5 8 ] ..................................... 8 0 9 FIGURE 176: LEFT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING [Group 5-11, 13, 42-43, 4 9 - 5 4 , 5 8 ] ........................................... 8 1 2 FIGURE 177: LEFT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING INSPECTION [Group 12, 1 4 - 4 1 , 4 4 - 4 8 , 5 5 - 5 7 , 5 9 - 8 3 ] .................................. 8 1 5 FIGURE 178: LEFT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING [Group 12, 14-41, 44-48, 5 5 - 5 7 , 5 9 - 8 3 ] ......................................... 8 1 8 FIGURE 179: RIGHT MAIN FUEL TANK AND RIGHT CENTER FUEL CHEEK TANK FRONT SPAR FASTENER CAP SEALING INSPECTION [Group 1-11, 13, 42-43, 49-54, 58] ............. 8 2 1 FIGURE 180: RIGHT MAIN FUEL TANK AND RIGHT CENTER FUEL CHEEK TANK FRONT SPAR FASTENER CAP SEALING [Group 1-11, 13, 42-43, 49-54, 58] ..................... 8 2 7 FIGURE 181: RIGHT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING INSPECTION [Group 1 2 , 1 4 - 4 1 , 4 4 - 4 8 , 5 5 - 5 7 , 5 9 - 8 3 ] ............................... 8 3 3 FIGURE 182: RIGHT MAIN FUEL TANK FRONT SPAR FASTENER CAP SEALING [Group 12, 14-41, 44-48, 5 5 - 5 7 , 5 9 - 8 3 ] ......................................... 8 3 6 FIGURE 183: RIGHT ECS BAY WIRE BUNDLE SLEEVING INSTALLATION [Group 1-47, 49-70, 72, 74-75] ................................................. 8 3 9 FIGURE 184: RIGHT ECS BAY WIRE BUNDLE SLEEVING INSPECTION [Group 48, 71, 73, 76-83] . 842 FIGURE 185: RIGHT ECS BAY WIRE BUNDLE SLEEVING INSTALLATION [Group 48, 71, 73, 76-83] . 845 FIGURE 186: LEFT ECS BAY WIRE BUNDLE SLEEVING INSPECTION [Group 23, 27, 40, 45] .... 8 4 8 FIGURE 187: LEFT ECS BAY WIRE BUNDLE SLEEVING INSTALLATION [Group 23, 27, 40, 45] . . . 851 APPENDIX A: SADDLE CLAMP TA0910070( ) PART NUMBER AND DIMENSION DATA ........ 8 5 4 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

Original Issue: January 26, 2006 777-57A0050Revision 6: August 18, 2021 10 of 857 BOEING SERVICE BULLETIN 777-57A0050

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Commercial Airplanes 777 Service Bulletin ALERT Revision Transmittal SheetNumber: 777-57A0050Original Issue: January 26, 2006 Revision 6: August 18, 2021 ATA System: 5710 SUBJECT: WINGS - Center and Outer Wings - Wire Bundle Teflon sleeve Installation and Fastener Cap Sealing for Fuel Tank Wiring Hot Short Protection This revision includes all pages of the service bulletin.

COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive AD 2017-11-14 is related to this service bulletin.

The effective date of AD 2017-11-14 is July 11, 2017.

The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.

Effects of this Revision on airplanes on which the Original Issue, Revision 1, Revision 2, Revision 3, Revision 4 or Revision 5 was previously done:

See Paragraph 1.D., Description for more information.

NOTE: AD 2017-11-14 replaces AD 2011-26-03 and AD 2010-24-12.

Multiple airplanes have been moved to new groups in this service bulletin effectivity. Refer to the table below and Paragraph 1.A.1., Airplanes, for the new Group assignments:

New GroupPrevious GroupAirplane Variable Number Group 49Group 7WD671-WD675 Group 50Group 7WD546, WD588 and WD626 Group 51Group 10WC363 and WC364 Group 52Group 11WC391-WC393 Group 53Group 12WC490-WC491 and WC522 Group 54Group 12WC506 and WC507 Group 55Group 12WB142 Group 56Group 12WC532 Group 57Group 12WC221 and WC222 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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New GroupPrevious GroupAirplane Variable Number Group 58Group 14WD547-WD548, WD565, and WD653 Group 59Group 14WD566-WD568 Group 60Group 14WD508-WD510, WD538-WD539, WD595-WD596, WD660-WD662, WD705-WD709, WD747-WD750, WD803-WD805, WD829-WD830, WD849-WD852, WD873-WD875, WD936-WD939, and WD966- WD967 Group 61Group 14WD573 Group 62Group 14WD540, WD597-WD599, WD751, WD806, WD853, WD876, WD946, WD968, and WD981-WD982 Group 63Group 15WD014-WD015 and WD081 Group 64Group 15WD055 and WD068-WD073 Group 65Group 15WD016-WD018 Group 66Group 16WD569-WD571 Group 67Group 19WD572 Group 68Group 27WC223-WC224 Group 69Group 34WD103-WD105 Group 70Group 35WE128-WE137, WE176-WE177 Group 71Group 44WF170 Group 72Group 46WD106 Group 73Group 46WD112 Group 74Group 47WE143 and WE353 Group 75Group 47WE178 Group 76Group 47WE138-WE140, WE486-WE493, WE495-WE498, WE591, WE626- WE627 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

Original Issue: January 26, 2006 777-57A0050Revision 6: August 18, 2021 12 of 857 BOEING SERVICE BULLETIN 777-57A0050

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