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© The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2022-0154; AD 2022-18-11 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

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Commercial Airplanes 777 Requirements Bulletin ALERT Number: 777-57A0122 RB Original Issue: October 08, 2021 ATA System: 5710 5330 SUBJECT: WINGS - Center Wing - Ring Chord, Front Spar Lower Chord and Front Spar Web - Inspection and Modification 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:

Copyright © 2021 Boeing.

Unpublished Work. All Rights Reserved.

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: October 08, 2021 777-57A0122 RB 1 of 968

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Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

Original Issue: October 08, 2021 777-57A0122 RB 2 of 968 REQUIREMENTS BULLETIN 777-57A0122

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Table of Contents 1 . E F F E C T I V I T Y ............................................... 1 1 A. Airplanes ............................................... 1 1 B . S p a r e s A f f e c t e d ........................................... 3 1

2. CONCURRENT REQUIREMENTS .................................... 3 1 3 . C O M P L I A N C E ............................................... 3 2

4. APPROVAL ................................................ 1 6 5

5. ACCOMPLISHMENT INSTRUCTIONS ................................. 1 6 7 A. General Information ........................................ 1 6 7 B. Work Instructions .......................................... 1 6 8 FIGURE 1: LEFT SIDE RING CHORD - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION . 312 FIGURE 2: LEFT SIDE FRONT SPAR LOWER CHORD - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, Configuration 1-8; Group 2, Configuration 1-8; Group 3, Configuration 1-8; Group 4, Configuration 1-2; Group 5, Configuration 1-8; Group 6, Configuration 1-2; Group 7, Configuration 1-8; Group 8, Configuration 1-8; Group 9, Configuration 1-2] ...... 3 1 4 FIGURE 3: LEFT SIDE FRONT SPAR WEB - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, Configuration 1-8; Group 2, Configuration 1-8; Group 3, Configuration 1-8; Group 4, Configuration 1-2; Group 5, Configuration 1-8; Group 6, Configuration 1-2; Group 7, Configuration 1-8; Group 8, Configuration 1-8; Group 9, Configuration 1-2] ................ 3 1 7 FIGURE 4: LEFT SIDE FRONT SPAR WEB - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, Configuration 9-16; Group 2-9] .......................... 3 1 9 FIGURE 5: LEFT SIDE REPAIR ANGLE - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, Configuration 9-16; Group 2, Configuration 9-16; Group 3, Configuration 9-16; Group 4, Configuration 3-4; Group 5, Configuration 9-16; Group 6, Configuration 3-4; Group 7, Configuration 9-16; Group 8, Configuration 9-16; Group 9, Configuration 2-3] ...... 3 2 2 FIGURE 6: LEFT SIDE FRONT SPAR LOWER CHORD - ULTRASONIC (UT) INSPECTION [Group 2, Configuration 1-8; Group 3, Configuration 1-8; Group 4, Configuration 1-2; Group 5, Configuration 1-8; Group 6, Configuration 1-2; Group 7, Configuration 1-8; Group 8, Configuration 1-8; Group 9, Configuration 1-2] ..................................... 3 2 5 FIGURE 7: LEFT SIDE RING CHORD - ULTRASONIC (UT) INSPECTION [Group 2, Configuration 1-4, 9-12; Group 3, Configuration 1-4, 9-12; Group 4, Configuration 1-2; Group 5-6; Group 7, Configuration 1-4, 9-12; Group 8, Configuration 1-4, 9-12; Group 9, Configuration 1-2] . 328 FIGURE 8: LEFT SIDE REPAIR ANGLE - ULTRASONIC INSPECTION [Group 2, Configuration 9-16; Group 3, Configuration 9-16; Group 4, Configuration 3-4; Group 5, Configuration 9-16; Group 6, Configuration 3-4; Group 7, Configuration 9-16; Group 8, Configuration 9-16; Group 9, Configuration 3-4] ....................................... 3 3 0 FIGURE 9: LEFT SIDE FRONT SPAR LOWER CHORD SEALANT APPLICATION [Group 1, Configuration 1-8; Group 2, Configuration 1-8; Group 3, Configuration 1-8; Group 4, Configuration 1-2; Group 5, Configuration 1-8; Group 6, Configuration 1-2; Group 7, Configuration 1-8; Group 8, Configuration 1-8; Group 9, Configuration 1-2] ....................... 3 3 3 FIGURE 10: LEFT SIDE REPAIR ANGLE SEALANT APPLICATION [Group 1, Configuration 9-16; Group 2 - 9 ] ............................................... 3 3 6 FIGURE 11: RIGHT SIDE RING CHORD - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION ................................................. 3 3 9 FIGURE 12: RIGHT SIDE FRONT SPAR LOWER CHORD - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, Configuration 1-2, 5-6, 9-10, 13-14; Group 2, Configuration 1-10, 13-14;

Group 3, Configuration 1-10, 13-14; Group 4, Configuration 1-3; Group 5, Configuration 1-3, 5-6, 9-10, 13-14; Group 6, Configuration 1, 3; Group 7, Configuration 1-10, 13-14; Group 8, Configuration 1-10, 13-14; Group 9, Configuration 1-3] ................... 3 4 1 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

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FIGURE 13: RIGHT SIDE FRONT SPAR WEB - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, Configuration 1-2, 5-6, 9-10, 13-14; Group 2, Configuration 1-2, 5-6, 9-10, 13-14;

Group 3, Configuration 1-2, 5-6, 9-10, 13-14; Group 4, Configuration 1, 3; Group 5, Configuration 1-2, 5-6, 9-10, 13-14; Group 6, Configuration 1, 3; Group 7, Configuration 1-2, 5-6, 9-10, 13-14;

Group 8, Configuration 1-2, 5-6, 9-10, 13-14; Group 9, Configuration 1, 3] ........ 3 4 4 FIGURE 14: RIGHT SIDE FRONT SPAR WEB - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, Configuration 3-4, 7-8, 11-12, 15-16; Group 2-9] ................. 3 4 6 FIGURE 15: RIGHT SIDE REPAIR ANGLE - HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION [Group 1, Configuration 3-4, 7-8, 11-12, 15-16; Group 2, Configuration 3-4, 7-8, 11-12, 15-16;

Group 3, Configuration 3-4, 7-8, 11-12, 15-16; Group 4, Configuration 2, 4; Group 5, Configuration 3-4, 7-8, 11-12, 15-16; Group 6, Configuration 2, 4; Group 7, Configuration 3-4, 7-8, 11-12, 15-16; Group 8, Configuration 3-4, 7-8, 11-12, 15-16; Group 9, Configuration 2, 4] .... 3 4 9 FIGURE 16: RIGHT SIDE FRONT SPAR LOWER CHORD - ULTRASONIC (UT) INSPECTION [Group 2, Configuration 1-2, 5-6, 9-10, 13-14; Group 3, Configuration 1-2, 5-6, 9-10, 13-14; Group 4, Configuration 1, 3; Group 5, Configuration 1-2, 5-6, 9-10, 13-14; Group 6, Configuration 1, 3;

Group 7, Configuration 1-2, 5-6, 9-10, 13-14; Group 8, Configuration 1-2, 5-6, 9-10, 13-14; Group 9, Configuration 1, 3] ..................................... 3 5 2 FIGURE 17: RIGHT SIDE RING CHORD - ULTRASONIC INSPECTION [Group 2, Configuration 1, 3, 5, 7, 9, 11, 13, 15; Group 3, Configuration 1, 3, 5, 7, 9, 11, 13, 15; Group 4, Configuration 1, 3; Group 5, Configuration 1-2, 5-6, 9-10, 13-14; Group 6, Configuration 1, 3; Group 7, Configuration 1, 3, 5, 7, 9, 11, 13, 15; Group 8, Configuration 1, 3, 5, 7, 9, 11, 13, 15; Group 9, Configuration 1, 3] ................................................. 3 5 5 FIGURE 18: RIGHT SIDE REPAIR ANGLE - ULTRASONIC INSPECTION [Group 2, Configuration 3-4, 7-8, 11-12, 15-16; Group 3, Configuration 3-4, 7-8, 11-12, 15-16; Group 4, Configuration 2, 4; Group 5, Configuration 3-4, 7-8, 11-12, 15-16; Group 6, Configuration 2, 4; Group 7, Configuration 3-4, 7-8, 11-12, 15-16; Group 8, Configuration 3-4, 7-8, 11-12, 15-16; Group 9, Configuration 2, 4] ................................................. 3 5 7 FIGURE 19: RIGHT SIDE FRONT SPAR LOWER CHORD SEALANT APPLICATION [Group 1, Configuration 1-2, 5-6, 9-10, 13-14; Group 2, Configuration 1-2, 5-6, 9-10, 13-14; Group 3, Configuration 1-2, 5-6, 9-10, 13-14; Group 4, Configuration 1, 3; Group 5, Configuration 1-2, 6-7, 9-10, 13-14;

Group 6, Configuration 1, 3; Group 7, Configuration 1-2, 5-6, 9-10, 13-14; Group 8, Configuration 1-2, 5-6, 9-10, 13-14; Group 9, Configuration 1, 3] ..................... 3 6 0 FIGURE 20: RIGHT SIDE REPAIR ANGLE SEALANT APPLICATION [Group 1, Configuration 3-4, 7-8, 11-12, 15-16; Group 2; Group 3, Configuration 3-4, 7-8, 11-12, 15-16; Group 4, Configuration 2, 4;

Group 5, Configuration 3-4, 7-8, 11-12, 15-16; Group 6, Configuration 2, 4; Group 7, Configuration 3-4, 7-8, 11-12, 15-16; Group 8, Configuration 3-4, 7-8, 12-13, 15-16; Group 9, Configuration 2 , 4 ] .............................................. 3 6 3 FIGURE 21: LEFT SIDE UNDERWING LONGERON REMOVAL [Group 2, Configuration 1-4; Group 3, Configuration 1-4] ....................................... 3 6 7 FIGURE 22: LEFT SIDE UNDERWING LONGERON REMOVAL [Group 2, Configuration 5-8; Group 3, Configuration 5-8; Group 4, Configuration 1-2] ....................... 3 7 0 FIGURE 23: LEFT SIDE UNDERWING LONGERON REMOVAL [Group 5, Configuration 1-4] .... 3 7 3 FIGURE 24: LEFT SIDE UNDERWING LONGERON REMOVAL [Group 5, Configuration 5-8; Group 6, Configuration 1-2] ....................................... 3 7 6 FIGURE 25: LEFT SIDE UNDERWING LONGERON REMOVAL [Group 7, Configuration 1-4; Group 8, Configuration 1-4] ....................................... 3 7 9 FIGURE 26: LEFT SIDE UNDERWING LONGERON REMOVAL [Group 7, Configuration 5-8; Group 8, Configuration 5-8; Group 9, Configuration 1-2] ....................... 3 8 2 FIGURE 27: LEFT SIDE BRACKETS REMOVAL [Group 2, Configuration 1-4] ............. 3 8 5 FIGURE 28: LEFT SIDE BRACKETS REMOVAL [Group 3, Configuration 1-4] ............. 3 8 8 FIGURE 29: LEFT SIDE BRACKETS REMOVAL [Group 2, Configuration 5-8] ............. 3 9 1 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

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FIGURE 30: LEFT SIDE BRACKETS REMOVAL [Group 3, Configuration 5-8; Group 4, Configuration 1-2] ................................................. 3 9 4 FIGURE 31: LEFT SIDE BRACKETS REMOVAL [Group 5, Configuration 1-4] ............. 3 9 7 FIGURE 32: LEFT SIDE BRACKETS REMOVAL [Group 5, Configuration 5-8; Group 6, Configuration 1-2] ................................................. 4 0 0 FIGURE 33: LEFT SIDE BRACKETS REMOVAL [Group 7, Configuration 1-4; Group 8, Configuration 1-4] ................................................. 4 0 3 FIGURE 34: LEFT SIDE BRACKETS REMOVAL [Group 7, Configuration 5-8; Group 8, Configuration 5-8;

Group 9, Configuration 1-2] .................................. 4 0 6 FIGURE 35: LEFT SIDE FUSELAGE UNDERWING LONGERON FASTENER REMOVAL AND STRINGER S-37L END FITTING REMOVAL AND OPEN HOLE INSPECTION [Group 2, Configuration 1-4] ................................................. 4 0 9 FIGURE 36: LEFT SIDE FUSELAGE UNDERWING LONGERON FASTENER REMOVAL AND OPEN HOLE INSPECTION [Group 3, Configuration 1-4] ......................... 4 1 2 FIGURE 37: LEFT SIDE FUSELAGE UNDERWING LONGERON FASTENER REMOVAL AND OPEN HOLE INSPECTION [Group 5, Configuration 1-4] ......................... 4 1 5 FIGURE 38: LEFT SIDE FUSELAGE UNDERWING LONGERON FASTENER REMOVAL AND OPEN HOLE INSPECTION [Group 7, Configuration 1-4; Group 8, Configuration 1-4] .......... 4 1 8 FIGURE 39: LEFT SIDE WING BOTTOM SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 2, Configuration 1-8; Group 3, Configuration 1-8; Group 4, Configuration 1-2; Group 5, Configuration 1-8; Group 6, Configuration 1-2; Group 7, Configuration 1-8; Group 8, Configuration 1-8; Group 9, Configuration 1-2] ............................... 4 2 1 FIGURE 40: LEFT SIDE FUSELAGE SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 2, Configuration 1-4] ..................................... 4 2 5 FIGURE 41: LEFT SIDE FUSELAGE SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 3, Configuration 1-4; Group 5, Configuration 1-4] ...................... 4 3 0 FIGURE 42: LEFT SIDE FUSELAGE SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 7, Configuration 1-4] ..................................... 4 3 5 FIGURE 43: LEFT SIDE FUSELAGE SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 8, Configuration 1-4] ..................................... 4 4 0 FIGURE 44: LEFT SIDE UNDERWING LONGERON FUSELAGE SKIN DOUBLER INSPECTION [Group 2, Configuration 5-8; Group 3, Configuration 5-8; Group 4, Configuration 1-2; Group 5, Configuration 5-8; Group 6, Configuration 1-2; Group 7, Configuration 5-8; Group 8, Configuration 5-8; Group 9, Configuration 1-2] ..................................... 4 4 5 FIGURE 45: STRINGER S-37L END FITTING PREPARATION [Group 2, Configuration 1-4] ..... 4 4 9 FIGURE 46: LEFT SIDE FRONT SPAR LOWER CHORD FASTENER REMOVAL [Group 2, Configuration 1-4; Group 3, Configuration 1-4; Group 5, Configuration 1-4; Group 7, Configuration 1-4; Group 8, Configuration 1-4] ..................................... 4 5 2 FIGURE 47: LEFT SIDE FRONT SPAR LOWER CHORD FASTENER REMOVAL [Group 2, Configuration 5-8; Group 3, Configuration 5-8; Group 4, Configuration 1-2; Group 5, Configuration 5-8; Group 6, Configuration 1-2; Group 7, Configuration 5-8; Group 8, Configuration 5-8; Group 9, Configuration 1-2] ....................................... 4 5 6 FIGURE 48: LEFT SIDE DOUBLER AFT EDGE BLEND [Group 2, Configuration 5-8; Group 3, Configuration 5-8; Group 4, Configuration 1-2; Group 5, Configuration 5-8; Group 6, Configuration 1-2; Group 7, Configuration 5-8; Group 8, Configuration 5-8; Group 9, Configuration 1-2] ...... 4 6 1 FIGURE 49: LEFT SIDE FRONT SPAR LOWER CHORD PREPARATION [Group 2, Configuration 1-8; Group 3, Configuration 1-8; Group 4, Configuration 1-2; Group 5, Configuration 1-8; Group 6, Configuration 1-2; Group 7, Configuration 1-8; Group 8, Configuration 1-8; Group 9, Configuration 1 - 2 ] ............................................... 4 6 4 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

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FIGURE 50: LEFT SIDE FRONT SPAR LOWER CHORD FILLERS PREPARATION [Group 2, Configuration 1-8; Group 3, Configuration 1-8; Group 4, Configuration 1-2; Group 7, Configuration 1-8; Group 8, Configuration 1-8; Group 9, Configuration 1-2] ...................... 4 6 9 FIGURE 51: LEFT SIDE FRONT SPAR LOWER CHORD FILLERS PREPARATION [Group 5, Configuration 1-8; Group 6, Configuration 1-2] ............................... 4 7 4 FIGURE 52: LEFT SIDE FRONT SPAR LOWER CHORD REPAIR ANGLE PREPARATION [Group 2, Configuration 1-4; Group 3, Configuration 1-4; Group 5, Configuration 1-4; Group 7, Configuration 1-4; Group 8, Configuration 1-4] ............................... 4 7 9 FIGURE 53: LEFT SIDE FRONT SPAR LOWER CHORD REPAIR ANGLE PREPARATION [Group 2, Configuration 5-8; Group 3, Configuration 5-8; Group 4, Configuration 1-2; Group 5, Configuration 5-8; Group 6, Configuration 1-2; Group 7, Configuration 5-8; Group 8, Configuration 5-8; Group 9, Configuration 1-2] ..................................... 4 8 4 FIGURE 54: LEFT SIDE FRONT SPAR LOWER CHORD MODIFICATION INSTALLATION [Group 2, Configuration 1-4; Group 3, Configuration 1-4; Group 7, Configuration 1-4; Group 8, Configuration 1 - 4 ] ............................................... 4 9 0 FIGURE 55: LEFT SIDE FRONT SPAR LOWER CHORD MODIFICATION INSTALLATION [Group 2, Configuration 5-8; Group 3, Configuration 5-8; Group 4, Configuration 1-2; Group 7, Configuration 5-8; Group 8, Configuration 5-8; Group 9, Configuration 1-2] ................ 4 9 7 FIGURE 56: LEFT SIDE FRONT SPAR LOWER CHORD MODIFICATION INSTALLATION [Group 5, Configuration 1-4] ....................................... 5 0 4 FIGURE 57: LEFT SIDE FRONT SPAR LOWER CHORD MODIFICATION INSTALLATION [Group 5, Configuration 5-8; Group 6, Configuration 1-2] ....................... 5 1 1 FIGURE 58: LEFT SIDE FUSELAGE SKIN REPAIR PREPARATION [Group 2, Configuration 1-4] . . 518 FIGURE 59: LEFT SIDE FUSELAGE SKIN REPAIR PREPARATION [Group 3, Configuration 1-4; Group 5, Configuration 1-4] ....................................... 5 2 1 FIGURE 60: LEFT SIDE FUSELAGE SKIN REPAIR PREPARATION [Group 7, Configuration 1-4] . . 524 FIGURE 61: LEFT SIDE FUSELAGE SKIN REPAIR PREPARATION [Group 8, Configuration 1-4] . . 527 FIGURE 62: LEFT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 2, Configuration 1-4] ................................................. 5 3 0 FIGURE 63: LEFT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 3, Configuration 1-4] ................................................. 5 3 6 FIGURE 64: LEFT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 5, Configuration 1-4] ................................................. 5 4 2 FIGURE 65: LEFT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 7, Configuration 1-4] ................................................. 5 4 8 FIGURE 66: LEFT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 8, Configuration 1-4] ................................................. 5 5 3 FIGURE 67: LEFT SIDE DOUBLER INSTALLATION [Group 2, Configuration 1-4] ........... 5 5 8 FIGURE 68: LEFT SIDE DOUBLER INSTALLATION [Group 3, Configuration 1-4] ........... 5 6 4 FIGURE 69: LEFT SIDE DOUBLER INSTALLATION [Group 5, Configuration 1-4] ........... 5 6 9 FIGURE 70: LEFT SIDE DOUBLER INSTALLATION [Group 7, Configuration 1-4] ........... 5 7 4 FIGURE 71: LEFT SIDE DOUBLER INSTALLATION [Group 8, Configuration 1-4] ........... 5 7 9 FIGURE 72: LEFT SIDE UNDERWING LONGERON INSTALLATION [Group 2, Configuration 1-4] . . 584 FIGURE 73: LEFT SIDE UNDERWING LONGERON INSTALLATION [Group 3, Configuration 1-4; Group 5, Configuration 1-4] ....................................... 5 8 9 FIGURE 74: LEFT SIDE UNDERWING LONGERON INSTALLATION [Group 4, Configuration 1-2; Group 6, Configuration 1-2] ....................................... 5 9 5 FIGURE 75: LEFT SIDE UNDERWING LONGERON INSTALLATION [Group 2, Configuration 5-8; Group 3, Configuration 5-8; Group 5, Configuration 5-8] ....................... 6 0 5 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

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FIGURE 76: LEFT SIDE UNDERWING LONGERON INSTALLATION [Group 7, Configuration 1-4] . . 615 FIGURE 77: LEFT SIDE UNDERWING LONGERON INSTALLATION [Group 7, Configuration 5-8] . . 621 FIGURE 78: LEFT SIDE UNDERWING LONGERON INSTALLATION [Group 8, Configuration 1-4] . . 631 FIGURE 79: LEFT SIDE UNDERWING LONGERON INSTALLATION [Group 9, Configuration 1-2] . . 637 FIGURE 80: LEFT SIDE UNDERWING LONGERON INSTALLATION [Group 8, Configuration 5-8] . . 647 FIGURE 81: LEFT SIDE UNDERWING LONGERON CAP SEAL APPLICATION [Group 2, Configuration 1-8;

Group 3, Configuration 1-8; Group 4, Configuration 1-2; Group 5, Configuration 1-8; Group 6, Configuration 1-2] ....................................... 6 5 7 FIGURE 82: LEFT SIDE POST MODIFICATION UNDERWING LONGERON INSPECTION [Group 2, Configuration 1-8; Group 3, Configuration 1-8; Group 5, Configuration 1-8; Group 7, Configuration 1-8; Group 8, Configuration 1-8] ............................... 6 5 9 FIGURE 83: LEFT SIDE POST MODIFICATION FUSELAGE SKIN INSPECTION [Group 2, Configuration 1-8; Group 3, Configuration 1-8; Group 5, Configuration 1-8; Group 7, Configuration 1-8; Group 8, Configuration 1-8] ..................................... 6 6 2 FIGURE 84: RIGHT SIDE UNDERWING LONGERON REMOVAL [Group 2, Configuration 1, 5, 9, 13; Group 3, Configuration 1, 5, 9, 13] .................................. 6 6 5 FIGURE 85: RIGHT SIDE UNDERWING LONGERON REMOVAL [Group 2, Configuration 2, 6, 10, 14; Group 3, Configuration 2, 6, 10, 14; Group 4, Configuration 1, 3] ................. 6 6 8 FIGURE 86: RIGHT SIDE UNDERWING LONGERON REMOVAL [Group 5, Configuration 1, 5, 9, 13] . 671 FIGURE 87: RIGHT SIDE UNDERWING LONGERON REMOVAL [Group 5, Configuration 2, 6, 10, 14; Group 6, Configuration 1, 3] ..................................... 6 7 4 FIGURE 88: RIGHT SIDE UNDERWING LONGERON REMOVAL [Group 7, Configuration 1, 5, 9, 13; Group 8, Configuration 1, 5, 9, 13] .................................. 6 7 7 FIGURE 89: RIGHT SIDE UNDERWING LONGERON REMOVAL [Group 7, Configuration 2, 6, 10, 14; Group 8, Configuration 2, 6, 10, 14; Group 9, Configuration 1, 3] ................. 6 8 0 FIGURE 90: RIGHT SIDE BRACKETS REMOVAL [Group 2, Configuration 1, 5, 9, 13] ........ 6 8 3 FIGURE 91: RIGHT SIDE BRACKETS REMOVAL [Group 3, Configuration 1, 5, 9, 13] ........ 6 8 6 FIGURE 92: RIGHT SIDE BRACKETS REMOVAL [Group 2, Configuration 2, 6, 10, 14] ........ 6 8 9 FIGURE 93: RIGHT SIDE BRACKETS REMOVAL [Group 3, Configuration 2, 6, 10, 14; Group 4, Configuration 1 , 3 ] .............................................. 6 9 2 FIGURE 94: RIGHT SIDE BRACKETS REMOVAL [Group 5, Configuration 1, 5, 9, 13] ........ 6 9 5 FIGURE 95: RIGHT SIDE BRACKETS REMOVAL [Group 5, Configuration 2, 6, 10, 14; Group 6, Configuration 1 , 3 ] .............................................. 6 9 8 FIGURE 96: RIGHT SIDE BRACKETS REMOVAL [Group 7, Configuration 1, 5, 9, 13; Group 8, Configuration 1 , 5 , 9 , 1 3 ] ........................................... 7 0 1 FIGURE 97: RIGHT SIDE BRACKETS REMOVAL [Group 7, Configuration 2, 6, 10, 14; Group 8, Configuration 2, 6, 10, 14; Group 9, Configuration 1, 3] .......................... 7 0 4 FIGURE 98: RIGHT SIDE FUSELAGE UNDERWING LONGERON FASTENER REMOVAL AND STRINGER S-37L END FITTING REMOVAL AND OPEN HOLE INSPECTION [Group 2, Configuration 1, 5 , 9 , 1 3 ] ............................................ 7 0 7 FIGURE 99: RIGHT SIDE FUSELAGE UNDERWING LONGERON FASTENER REMOVAL AND OPEN HOLE INSPECTION [Group 3, Configuration 1, 5, 9, 13] .................. 7 1 0 FIGURE 100: RIGHT SIDE FUSELAGE UNDERWING LONGERON FASTENER REMOVAL AND OPEN HOLE INSPECTION [Group 5, Configuration 1, 5, 9, 13] .................. 7 1 3 FIGURE 101: RIGHT SIDE FUSELAGE UNDERWING LONGERON FASTENER REMOVAL AND OPEN HOLE INSPECTION [Group 7, Configuration 1, 5, 9, 13; Group 8, Configuration 1, 5, 9, 13] ................................................. 7 1 6 FIGURE 102: RIGHT SIDE WING BOTTOM SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 2, Configuration 1-2, 5-6, 9-10, 13-14; Group 3, Configuration 1-2, 5-6, 9-10, 13-14;

Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

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Group 5, Configuration 1-2, 5-6, 9-10, 13-14; Group 6, Configuration 1, 3; Group 7, Configuration 1-2, 5-6, 9-10, 13-14; Group 8, Configuration 1-2, 5-6, 9-10, 13-14; Group 9, Configuration 1, 3 ] ................................................ 7 1 9 FIGURE 103: RIGHT SIDE FUSELAGE SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 2, Configuration 1, 5, 9, 13] ............................. 7 2 3 FIGURE 104: RIGHT SIDE FUSELAGE SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 3, Configuration 1, 5, 9, 13; Group 5, Configuration 1, 5, 9, 13] .......... 7 2 8 FIGURE 105: RIGHT SIDE FUSELAGE SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 7, Configuration 1, 5, 9, 13] ............................. 7 3 3 FIGURE 106: RIGHT SIDE FUSELAGE SKIN AT UNDERWING LONGERON LOCATION INSPECTION [Group 8, Configuration 1, 5, 9, 13] ............................. 7 3 8 FIGURE 107: RIGHT SIDE UNDERWING LONGERON FUSELAGE SKIN DOUBLER INSPECTION [Group 2, Configuration 2, 6, 10, 14; Group 3, Configuration 2, 6, 10, 14; Group 4, Configuration 1, 3;

Group 5, Configuration 2, 6, 10, 14; Group 6, Configuration 1, 3; Group 7, Configuration 2, 6, 10, 14; Group 8, Configuration 2, 6, 10, 14; Group 9, Configuration 1, 3] ......... 7 4 3 FIGURE 108: STRINGER S-37R END FITTING PREPARATION [Group 2, Configuration 1, 5, 9, 13] . 747 FIGURE 109: RIGHT SIDE FRONT SPAR LOWER CHORD FASTENER REMOVAL [Group 2, Configuration 1, 5, 9, 13; Group 3, Configuration 1, 5, 9, 13; Group 5, Configuration 1, 5, 9, 13; Group 7, Configuration 1, 5, 9, 13; Group 8, Configuration 1, 5, 9, 13] ................ 7 5 0 FIGURE 110: RIGHT SIDE FRONT SPAR LOWER CHORD FASTENER REMOVAL [Group 2, Configuration 2, 6, 10, 14; Group 3, Configuration 2, 6, 10, 14; Group 4, Configuration 1, 3; Group 5, Configuration 2, 6, 10, 14; Group 6, Configuration 1, 3; Group 7, Configuration 2, 6, 10, 14;

Group 8, Configuration 2, 6, 10, 14; Group 9, Configuration 1, 3] ............. 7 5 4 FIGURE 111: RIGHT SIDE DOUBLER AFT EDGE BLEND [Group 2, Configuration 2, 6, 10, 14; Group 3, Configuration 2, 6, 10, 14; Group 4, Configuration 1, 3; Group 5, Configuration 2, 6, 10, 14;

Group 6, Configuration 1, 3; Group 7, Configuration 2, 6, 10, 14; Group 8, Configuration 2, 6, 10, 14; Group 9, Configuration 1, 3] ............................. 7 5 9 FIGURE 112: RIGHT SIDE FRONT SPAR LOWER CHORD PREPARATION [Group 2, Configuration 1-2, 5-6, 9-10, 13-14; Group 3, Configuration 1-2, 5-6, 9-10, 13-14; Group 4, Configuration 1, 3; Group 5, Configuration 1-2, 5-6, 9-10, 13-14; Group 6, Configuration 1, 3; Group 7, Configuration 1-2, 5-6, 9-10, 13-14; Group 8, Configuration 1-2, 5-6, 9-10, 13-14; Group 9, Configuration 1, 3] . 762 FIGURE 113: RIGHT SIDE FRONT SPAR LOWER CHORD FILLERS PREPARATION [Group 2, Configuration 1-2, 5-6, 9-10, 13-14; Group 3, Configuration 1-2, 5-6, 9-10, 13-14; Group 4, Configuration 1, 3; Group 7, Configuration 1-2, 5-6, 9-10, 13-14; Group 8, Configuration 1-2, 5-6, 9-10, 13-14;

Group 9, Configuration 1, 3] ................................. 7 6 7 FIGURE 114: RIGHT SIDE FRONT SPAR LOWER CHORD FILLERS PREPARATION [Group 5, Configuration 1-2, 5-6, 9-10, 13-14; Group 6, Configuration 1, 3] ..................... 7 7 2 FIGURE 115: RIGHT SIDE FRONT SPAR LOWER CHORD REPAIR ANGLE PREPARATION [Group 2, Configuration 1, 5, 9, 13; Group 3, Configuration 1, 5, 9, 13; Group 5, Configuration 1, 5, 9, 13;

Group 7, Configuration 1, 5, 9, 13; Group 8, Configuration 1, 5, 9, 13] ........... 7 7 7 FIGURE 116: RIGHT SIDE FRONT SPAR LOWER CHORD REPAIR ANGLE PREPARATION [Group 2, Configuration 2, 6, 10, 14; Group 3, Configuration 2, 6, 10, 14; Group 4, Configuration 1, 3;

Group 5, Configuration 2, 6, 10, 14; Group 6, Configuration 1, 3; Group 7, Configuration 2, 6, 10, 14; Group 8, Configuration 2, 6, 10, 14; Group 9, Configuration 1, 3] ......... 7 8 2 FIGURE 117: RIGHT SIDE FRONT SPAR LOWER CHORD MODIFICATION INSTALLATION [Group 2, Configuration 1, 5, 9, 13; Group 3, Configuration 1, 5, 9, 13; Group 7, Configuration 1, 5, 9, 13;

Group 8, Configuration 1, 5, 9, 13] .............................. 7 8 8 FIGURE 118: RIGHT SIDE FRONT SPAR LOWER CHORD MODIFICATION INSTALLATION [Group 2, Configuration 2, 6, 10, 14; Group 3, Configuration 2, 6, 10, 14; Group 4, Configuration 1, 3;

Group 7, Configuration 2, 6, 10, 14; Group 8, Configuration 2, 6, 10, 14; Group 9, Configuration 1 , 3 ] .............................................. 7 9 5 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

Original Issue: October 08, 2021 777-57A0122 RB 8 of 968 REQUIREMENTS BULLETIN 777-57A0122

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FIGURE 119: RIGHT SIDE FRONT SPAR LOWER CHORD MODIFICATION INSTALLATION [Group 5, Configuration 1, 5, 9, 13] ................................... 8 0 2 FIGURE 120: RIGHT SIDE FRONT SPAR LOWER CHORD MODIFICATION INSTALLATION [Group 5, Configuration 2, 6, 10, 14; Group 6, Configuration 1, 3] ................... 8 0 9 FIGURE 121: RIGHT SIDE FUSELAGE SKIN REPAIR PREPARATION [Group 2, Configuration 1, 5, 9, 13] ................................................. 8 1 6 FIGURE 122: RIGHT SIDE FUSELAGE SKIN REPAIR PREPARATION [Group 3, Configuration 1, 5, 9, 13;

Group 5, Configuration 1, 5, 9, 13] .............................. 8 1 9 FIGURE 123: RIGHT SIDE FUSELAGE SKIN REPAIR PREPARATION [Group 7, Configuration 1, 5, 9, 13] ................................................. 8 2 2 FIGURE 124: RIGHT SIDE FUSELAGE SKIN REPAIR PREPARATION [Group 8, Configuration 1, 5, 9, 13] ................................................. 8 2 5 FIGURE 125: RIGHT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 2, Configuration 1, 5, 9 , 1 3 ] .............................................. 8 2 8 FIGURE 126: RIGHT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 3, Configuration 1, 5, 9 , 1 3 ] .............................................. 8 3 4 FIGURE 127: RIGHT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 5, Configuration 1, 5, 9 , 1 3 ] .............................................. 8 4 0 FIGURE 128: RIGHT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 7, Configuration 1, 5, 9 , 1 3 ] .............................................. 8 4 6 FIGURE 129: RIGHT SIDE DOUBLER AND REPAIR FILLER INSTALLATION [Group 8, Configuration 1, 5, 9 , 1 3 ] .............................................. 8 5 2 FIGURE 130: RIGHT SIDE DOUBLER INSTALLATION [Group 2, Configuration 1, 5, 9, 13] ...... 8 5 8 FIGURE 131: RIGHT SIDE DOUBLER INSTALLATION [Group 3, Configuration 1, 5, 9, 13] ...... 8 6 4 FIGURE 132: RIGHT SIDE DOUBLER INSTALLATION [Group 5, Configuration 1, 5, 9, 13] ...... 8 7 0 FIGURE 133: RIGHT SIDE DOUBLER INSTALLATION [Group 7, Configuration 1, 5, 9, 13] ...... 8 7 6 FIGURE 134: RIGHT SIDE DOUBLER INSTALLATION [Group 8, Configuration 1, 5, 9, 13] ...... 8 8 2 FIGURE 135: RIGHT SIDE UNDERWING LONGERON INSTALLATION [Group 2, Configuration 1, 5, 9, 13] ................................................. 8 8 8 FIGURE 136: RIGHT SIDE UNDERWING LONGERON INSTALLATION [Group 3, Configuration 1, 5, 9, 13;

Group 5, Configuration 1, 5, 9, 13] .............................. 8 9 3 FIGURE 137: RIGHT SIDE UNDERWING LONGERON INSTALLATION [Group 4, Configuration 1, 3; Group 6, Configuration 1, 3] ..................................... 8 9 9 FIGURE 138: RIGHT SIDE UNDERWING LONGERON INSTALLATION [Group 2, Configuration 2, 6, 10, 14;

Group 3, Configuration 2, 6, 10, 14; Group 5, Configuration 2, 6, 10, 14] ......... 9 0 9 FIGURE 139: RIGHT SIDE UNDERWING LONGERON INSTALLATION [Group 7, Configuration 1, 5, 9, 13] ................................................. 9 1 9 FIGURE 140: RIGHT SIDE UNDERWING LONGERON INSTALLATION [Group 7, Configuration 2, 6, 10, 14] ................................................. 9 2 5 FIGURE 141: RIGHT SIDE UNDERWING LONGERON INSTALLATION [Group 8, Configuration 1, 5, 9, 13] ................................................. 9 3 5 FIGURE 142: RIGHT SIDE UNDERWING LONGERON INSTALLATION [Group 9, Configuration 1, 3] . 941 FIGURE 143: RIGHT SIDE UNDERWING LONGERON INSTALLATION [Group 8, Configuration 2, 6, 10, 14] ................................................. 9 5 1 FIGURE 144: RIGHT SIDE UNDERWING LONGERON CAP SEAL APPLICATION [Group 2, Configuration 1-2, 5-6, 9-10, 13-14; Group 3, Configuration 1-2, 5-6, 9-10, 13-14; Group 4, Configuration 1, 3; Group 5, Configuration 1-2, 5-6, 9-10, 13-14; Group 6, Configuration 1, 3] ....... 9 6 1 FIGURE 145: RIGHT SIDE POST MODIFICATION UNDERWING LONGERON INSPECTION [Group 2, Configuration 1-2, 5-6, 9-10, 13-14; Group 3, Configuration 1-2, 5-6, 9-10, 13-14; Group 5, Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

Original Issue: October 08, 2021 777-57A0122 RB 9 of 968 REQUIREMENTS BULLETIN 777-57A0122

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Configuration 1-2, 5-6, 9-10, 13-14; Group 7, Configuration 1-2, 5-6, 9-10, 13-14; Group 8, Configuration 1-2, 5-6, 9-10, 13-14] ............................. 9 6 3 FIGURE 146: RIGHT SIDE POST MODIFICATION FUSELAGE SKIN INSPECTION [Group 2, Configuration 1-2, 5-6, 9-10, 13-14; Group 3, Configuration 1-2, 5-6, 9-10, 13-14; Group 5, Configuration 1-2, 5-6, 9-10, 13-14; Group 7, Configuration 1-2, 5-6, 9-10, 13-14; Group 8, Configuration 1-2, 5-6, 9 - 1 0 , 1 3 - 1 4 ] .......................................... 9 6 6 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

Original Issue: October 08, 2021 777-57A0122 RB 10 of 968 REQUIREMENTS BULLETIN 777-57A0122

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Commercial Airplanes 777 Requirements Bulletin ALERT Number: 777-57A0122 RB Original Issue: October 08, 2021 ATA System: 5710 5330 SUBJECT: WINGS - Center Wing - Ring Chord, Front Spar Lower Chord and Front Spar Web - Inspection and Modification

THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER. THIS IS AN ENHANCED REQUIRED FOR COMPLIANCE DOCUMENT. THE BOEING

PROCESSES USED TO CREATE THE SERVICE BULLETIN (SB) AND THE REQUIREMENTS BULLETIN (RB) ENSURE THAT THE INFORMATION BETWEEN "RC START" AND "RC END" IN THE SB ARE IDENTICAL TO THE INFORMATION IN THE SAME SECTIONS (COMPLIANCE, WORK INSTRUCTIONS…) OF THE RB WHICH THE SB REFERS TO AS THE RELATED DOCUMENT.

1. Effectivity A. Airplanes This bulletin is applicable to 777-200, 777-200LR, 777-300, 777-300ER, 777F Airplane(s), line number(s) 41, 43, 47, 49, 52-67, 69-71, 73-74, 76, 78, 80, 82-88, 90-94, 96-99, 101-106, 108-112, 114-130, 132-133, 135-136, 138-140, 142-145, 147-158, 160-167, 169-172, 174-178, 180-212, 215-239, 241-263, 265-279, 281, 283-289, 291-292, 294, 298-337, 339-343, 345-348, 350-436, 438-481, 483-494, 496-506, 508, 510-522, 524-634, 636-1566, 1568-1573, 1575-1580, 1582-1586, 1588-1604, 1606-1610, 1612-1614, 1616-1619, 1621-1623, 1625-1628, 1630-1632, 1634-1637, 1639-1641, 1643-1646, 1648-1650, 1652-1655, 1657-1658, 1660-1667, 1669, 1671, 1673, 1675-1676, 1678-1679, 1681, 1683-1684, 1686-1687, 1689-1712, 1714-1715, 1718-1719, 1721-1722 in 9 Group(s). Where the effectivity is presented with hyphens between line numbers, the airplane applicability means "through" and "inclusive", e.g. line numbers 1-9 means line numbers 1 through 9 inclusive.

NOTE: The Variable Number table below includes all affected airplanes up to Line Number 1722.

Affected airplanes after Line Number 1722 will be added to the service bulletin's MyBoeingFleet.com (MBF) "get effectivity" result when they are added to the MBF Fleet Profile Page.

Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

Original Issue: October 08, 2021 777-57A0122 RB 11 of 968

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DESCRIPTIONCONFIGURATIONGROUP 777-200 and 777-300 Airplanes.- 1 777-200 and 777-300 Airplanes with left and right side Front Spar Lower Chord (FSLC) that have not been repaired in accordance with Structural Repair Manual (SRM) 57-10-10 or similar Boeing ODA approved repair and left and right Under Wing Longeron (UWL) that has not been modified in accordance with 777-53-0084 or 777-53-0087.

1 777-200 and 777-300 Airplanes with right side Under Wing Longeron (UWL) only modified in accordance with Service Bulletin (SB) 777-53-0084 or SB 777-53-0087, and left and right side Front Spar Lower Chord (FSLC) that have not been repaired in accordance with Structural Repair Manual (SRM) 57-10-10 or similar Boeing ODA approved repair.

2 777-200 and 777-300 Airplanes with right side Front Spar Lower Chord (FSLC) only repaired in accordance with Structural Repair Manual (SRM) 57-10-10 or similar Boeing ODA approved repair, and left and right Under Wing Longeron (UWL) that has not been modified in accordance with 777-53-0084 or 777-53-0087.

3 777-200 and 777-300 Airplanes with right side Front Spar Lower Chord (FSLC) only repaired in accordance with Structural Repair Manual (SRM) 57-10-10 or similar Boeing ODA approved repair and right side Under Wing Longeron (UWL) only modified in accordance with Service Bulletin (SB) 777-53-0084 or SB 777-53-0087.

4 777-200 and 777-300 Airplanes with left side Under Wing Longeron (UWL) only modified in accordance with Service Bulletin (SB) 777-53-0084 or SB 777-53-0087, and left and right side Front Spar Lower Chord (FSLC) that have not been repaired in accordance with Structural Repair Manual (SRM) 57-10-10 or similar Boeing ODA approved repair.

5 777-200 and 777-300 Airplanes with left and right side Under Wing Longeron (UWL) modified in accordance with Service Bulletin (SB) 777-53-0084 or SB 777-53-0087, and left and right side Front Spar Lower Chord (FSLC) that have not been repaired in accordance with Structural Repair Manual (SRM) 57-10-10 or similar Boeing ODA approved repair.

6 777-200 and 777-300 Airplanes with right side Front Spar Lower Chord (FSLC) only repaired in accordance with Structural Repair Manual (SRM) 57-10-10 or similar Boeing ODA approved repair and left side Under Wing Longeron (UWL) only modified in accordance with Service Bulletin (SB) 777-53-0084 or SB 777-53-0087.

7 8 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.

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