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Commercial Airplanes 777 Requirements Bulletin ALERT Number: 777-53A0100 RB Original Issue: March 16, 2023 ATA System: 5330 5700 SUBJECT: FUSELAGE - Section 43 - Fuselage Skin Common to the Left and Right Underwing Longeron Inspection EXPORT CONTROLLED - This technology or software is subject to the U.S. Export Administration Regulations (EAR), (15 C.F.R. Parts 730-774). No authorization from the U.S. Department of Commerce is required for export, re-export, in-country transfer, or access EXCEPT to country group E:1 or E:2 countries/persons per Supp.1 to Part 740 of the EAR.
9E991ECCN:
Copyright © 2023 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Unpublished Work.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: March 16, 2023 777-53A0100 RB 1 of 141
5.0
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 16, 2023 777-53A0100 RB 2 of 141 REQUIREMENTS BULLETIN 777-53A0100
ALERTALERT
BLANK PAGE
Table of Contents
1. EFFECTIVITY5
A. Airplanes5
B. Spares Affected10
2. CONCURRENT REQUIREMENTS11
3. COMPLIANCE11
4. APPROVAL56
5. ACCOMPLISHMENT INSTRUCTIONS57
A. General Information57
B. Work Instructions58
FIGURE 1: LEFT SIDE - FUSELAGE SKIN BETWEEN STA 1014 AND STA 1035, AT STRINGER S-37 - EXTERNAL INSPECTION [Group 1, Configuration 2, 4; Group 3, Configuration 2, 4; Group 4,
Configuration 2, 4; Group 6, Configuration 2, 4]118
FIGURE 2: LEFT SIDE - FUSELAGE SKIN BETWEEN STA 1014 AND STA 1035, AT STRINGER S-37 - INTERNAL INSPECTION [Group 1, Configuration 2, 4; Group 3, Configuration 2, 4; Group 4,
Configuration 2, 4; Group 6, Configuration 2, 4]121
FIGURE 3: LEFT SIDE - FUSELAGE SKIN BETWEEN STA 1014 AND STA 1035, AT STRINGER S-37 - EXTERNAL INSPECTION [Group 2, Configuration 2, 4; Group 5, Configuration 2, 4; Group 7,
Configuration 2, 4; Group 8, Configuration 2, 4]124
FIGURE 4: LEFT SIDE - FUSELAGE SKIN BETWEEN STA 1014 AND STA 1035, AT STRINGER S-37 - INTERNAL INSPECTION [Group 2, Configuration 2, 4; Group 5, Configuration 2, 4; Group 7,
Configuration 2, 4; Group 8, Configuration 2, 4]127
FIGURE 9: RIGHT SIDE - FUSELAGE SKIN BETWEEN STA 1014 AND STA 1035, AT STRINGER S-37
- EXTERNAL INSPECTION [Group 1, Configuration 2-3; Group 3, Configuration 2-3; Group 4,
Configuration 2-3; Group 6, Configuration 2-3]130
FIGURE 10: RIGHT SIDE - FUSELAGE SKIN BETWEEN STA 1014 AND STA 1035, AT STRINGER S-37
- INTERNAL INSPECTION [Group 1, Configuration 2-3; Group 3, Configuration 2-3; Group 4,
Configuration 2-3; Group 6, Configuration 2-3]133
FIGURE 11: RIGHT SIDE - FUSELAGE SKIN BETWEEN STA 1014 AND STA 1035, AT STRINGER S-37
- EXTERNAL INSPECTION [Group 2, Configuration 2-3; Group 5, Configuration 2-3; Group 7,
Configuration 2-3; Group 8, Configuration 2-3]136
FIGURE 12: RIGHT SIDE - FUSELAGE SKIN BETWEEN STA 1014 AND STA 1035, AT STRINGER S-37
- INTERNAL INSPECTION [Group 2, Configuration 2-3; Group 5, Configuration 2-3; Group 7,
Configuration 2-3; Group 8, Configuration 2-3]139
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 16, 2023 777-53A0100 RB 3 of 141 REQUIREMENTS BULLETIN 777-53A0100
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Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 16, 2023 777-53A0100 RB 4 of 141 REQUIREMENTS BULLETIN 777-53A0100
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Commercial Airplanes 777 Requirements Bulletin ALERT Number: 777-53A0100 RB Original Issue: March 16, 2023 ATA System: 5330 5700 SUBJECT: FUSELAGE - Section 43 - Fuselage Skin Common to the Left and Right Underwing Longeron Inspection
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) 1-1522, 1524 in 8 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.
The Variable Numbers and Group Information for the applicable airplanes is given below.
DESCRIPTIONCONFIGURATIONGROUP 777-200 airplanes that have the Underwing Longeron (UWL), without tab and with stringer S-37 end fitting.
-1 Airplanes that have done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087.
1 Airplanes that have not done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087.
2 Airplanes that have done the UWL with fuselage skin modification on the left side only, in accordance with SB 777-53-0087.
3 Airplanes that have done the UWL with fuselage skin modification on the right side only, in accordance with SB 777-53-0087.
4 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 16, 2023 777-53A0100 RB 5 of 141
DESCRIPTIONCONFIGURATIONGROUP 777-200 airplanes that have the UWL, with tab and without stringer S-37 end fitting.
-2 Airplanes that have done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087.
1 Airplanes that have not done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087.
2 Airplanes that have done the UWL with fuselage skin modification on the left side only, in accordance with SB 777-53-0087.
3 Airplanes that have done the UWL with fuselage skin modification on the right side only, in accordance with SB 777-53-0087.
4 777-300 airplanes only.-3 Airplanes that have done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0084.
1 Airplanes that have not done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0084.
2 Airplanes that have done the UWL with fuselage skin modification on the left side only, in accordance with SB 777-53-0084.
3 Airplanes that have done the UWL with fuselage skin modification on the right side only, in accordance with SB 777-53-0084.
4 777-300ER airplanes that have the UWL, without tab and with stringer S-37 end fitting.
-4 Airplanes that have done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0084 or Requirements Bulletin 777-57A0122 RB.
1 Airplanes that have not done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0084 or Requirements Bulletin 777-57A0122 RB.
2 Airplanes that have done the UWL with fuselage skin modification on the left side only, in accordance with SB 777-53-0084 or Requirements Bulletin 777-57A0122 RB.
3 Airplanes that have done the UWL with fuselage skin modification on the right side only, in accordance with SB 777-53-0084 or Requirements Bulletin 777-57A0122 RB.
4 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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DESCRIPTIONCONFIGURATIONGROUP 777-300ER airplanes that have the UWL, with tab and without stringer S-37 end fitting.
-5 Airplanes that have done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0084 or Requirements Bulletin 777-57A0122 RB.
1 Airplanes that have not done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0084 or Requirements Bulletin 777-57A0122 RB.
2 Airplanes that have done the UWL with fuselage skin modification on the left side only, in accordance with SB 777-53-0084 or Requirements Bulletin 777-57A0122 RB.
3 Airplanes that have done the UWL with fuselage skin modification on the right side only, in accordance with SB 777-53-0084 or Requirements Bulletin 777-57A0122 RB.
4 777-200LR airplanes that have the UWL, without tab and with stringer S-37 end fitting.
-6 Airplanes that have done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
1 Airplanes that have not done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
2 Airplanes that have done the UWL with fuselage skin modification on the left side only, in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
3 Airplanes that have done the UWL with fuselage skin modification on the right side only, in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
4 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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DESCRIPTIONCONFIGURATIONGROUP 777-200LR airplanes that have the UWL, with tab and without stringer S-37 end fitting.
-7 Airplanes that have done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
1 Airplanes that have not done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
2 Airplanes that have done the UWL with fuselage skin modification on the left side only, in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
3 Airplanes that have done the UWL with fuselage skin modification on the right side only, in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
4 777F airplanes only.-8 Airplanes that have done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
1 Airplanes that have not done the UWL with fuselage skin modification on the left and right side in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
2 Airplanes that have done the UWL with fuselage skin modification on the left side only, in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
3 Airplanes that have done the UWL with fuselage skin modification on the right side only, in accordance with SB 777-53-0087 or Requirements Bulletin 777-57A0122 RB.
4 Airplane Models:
777-200, 777-200LR, 777-300, 777-300ER, 777F GroupVariable Number 1WA001 - WA017 1WA076 - WA080 1WA086 - WA093 GroupVariable Number 1WA101 - WA104 1WA116 - WA119 1WA131 - WA137 GroupVariable Number 1WA171 - WA175 1WA196 - WA198 1WA206 - WA212 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 16, 2023 777-53A0100 RB 8 of 141 REQUIREMENTS BULLETIN 777-53A0100
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GroupVariable Number 1WA221 - WA223 1WA231 - WA232 1WA241 - WA250 1WA261 - WA266 1WA281 - WA282 2WA283 1WA301 - WA304 1WB001 - WB021 1WB031 - WB046 1WB051 - WB088 1WB101 - WB106 1WB121 - WB125 1WB131 - WB142 2WB143 - WB148 1WB151 - WB155 1WB161 - WB177 1WB181 - WB194 1WB201 - WB215 1WB231 - WB247 1WB271 - WB273 1WB276 - WB286 1WB291 - WB302 1WB306 - WB307 1WB311 - WB337 1WB341 - WB342 1WB366 - WB368 1WB371 - WB388 1WB406 1WB411 - WB413 1WB416 - WB439 1WB446 - WB453 1WB476 1WB481 - WB484 GroupVariable Number 3WB501 - WB512 3WB531 - WB537 3WB551 - WB554 3WB591 - WB597 3WB601 - WB606 3WB611 - WB622 3WB631 - WB638 3WB646 - WB649 1WC051 - WC073 1WC101 - WC104 1WC111 - WC117 2WC118 - WC120 1WC221 - WC222 2WC223 - WC224 1WC241 - WC243 1WC281 - WC290 1WC301 - WC308 1WC361 - WC364 1WC371 - WC374 1WC381 - WC394 2WC395 1WC441 1WC446 - WC449 1WC456 - WC459 1WC486 - WC493 1WC506 - WC508 1WC521 - WC522 1WC531 - WC534 2WC535 - WC536 1WC546 - WC547 2WC548 1WC556 2WC566 - WC567 GroupVariable Number 2WC571 - WC574 2WC581 2WC586 - WC587 2WC591 - WC595 6WD001 - WD002 6WD011 - WD013 7WD014 - WD018 7WD031 - WD036 7WD046 - WD055 7WD066 - WD075 7WD081 - WD089 7WD091 7WD096 7WD101 - WD106 7WD111 - WD112 7WD116 - WD117 7WD121 - WD122 4WD501 - WD506 5WD507 - WD513 4WD521 - WD534 5WD535 - WD541 4WD546 - WD551 5WD552 - WD554 4WD561 - WD568 5WD569 - WD573 4WD581 - WD591 5WD592 - WD599 4WD606 - WD609 4WD621 - WD631 5WD632 4WD651 - WD655 5WD656 - WD665 4WD671 - WD675 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 16, 2023 777-53A0100 RB 9 of 141 REQUIREMENTS BULLETIN 777-53A0100
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GroupVariable Number 5WD676 - WD677 4WD691 - WD699 5WD700 - WD709 4WD741 - WD742 5WD743 - WD752 4WD761 5WD762 - WD771 4WD786 - WD787 5WD788 5WD796 - WD837 5WD846 - WD867 5WD871 - WD906 5WD911 - WD918 5WD921 - WD957 5WD966 - WD970 5WD981 - WD982 5WD986 - WD987 5WD991 - WD996 5WE001 - WE007 5WE011 - WE012 5WE021 - WE026 5WE031 - WE040 5WE051 - WE057 5WE071 - WE078 5WE081 - WE084 5WE091 - WE095 5WE126 - WE178 5WE186 - WE219 5WE226 - WE231 5WE236 - WE253 5WE261 - WE267 GroupVariable Number 5WE271 - WE278 5WE291 - WE298 5WE301 - WE320 5WE331 - WE346 5WE351 - WE356 5WE376 - WE377 5WE381 5WE386 - WE387 5WE391 - WE392 5WE396 - WE405 5WE416 - WE420 5WE426 - WE431 5WE436 - WE446 5WE451 - WE478 5WE486 - WE493 5WE495 - WE499 5WE501 - WE504 5WE511 - WE516 5WE526 - WE528 5WE536 - WE549 5WE556 - WE571 5WE576 - WE583 5WE591 5WE601 - WE605 5WE626 - WE627 5WE631 5WE641 - WE642 5WE646 - WE647 5WE651 - WE661 5WE666 - WE677 5WE681 GroupVariable Number 5WE701 - WE705 5WE711 - WE712 5WE731 - WE732 5WE736 - WE740 5WE746 - WE764 5WE776 - WE786 5WE791 - WE792 5WE796 5WE811 - WE812 5WE826 8WF001 - WF004 8WF016 - WF027 8WF031 - WF043 8WF046 - WF069 8WF075 - WF077 8WF081 - WF088 8WF096 - WF101 8WF106 - WF109 8WF111 - WF124 8WF131 - WF144 8WF146 - WF147 8WF151 - WF152 8WF156 - WF160 8WF166 - WF173 8WF176 - WF179 8WF181 - WF184 8WF191 8WF206 - WF208 8WF216 - WF217 -- -- B. Spares Affected None.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 16, 2023 777-53A0100 RB 10 of 141 REQUIREMENTS BULLETIN 777-53A0100
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2. CONCURRENT REQUIREMENTS None.
3. COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to Requirements Bulletin 777-53A0100 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 777-53A0100 RB mandatory.
Accomplish the required action(s), based on the applicable condition(s) in Tables 1 through 17, in accordance with Accomplishment Instructions.
When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
Group 1-8, Configuration 1:
Table 1: No Further Action Required Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition --No further action required.All Airplanes.
Group 1, Configuration 2, 4:
Table 2: Left Side - Inspection of Fuselage Skin Common to the Underwing Longeron (UWL) between STA 1014 and STA 1035, at Stringer S-37 Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time (Whichever Occurs Later) ActionCondition -Within 24 months or 2,200 flight cycles or 17,600 flight hours after the Original Issue date of Requirements Bulletin 777-53A0100 RB, whichever occurs first.
Before 8,400 total flight cycles or 56,400 total flight hours, whichever occurs first.
OPTION 1 (ACTION 1): Do an external Detailed (DET) Inspection of the left side fuselage skin for any crack.
All Airplanes.
OPTION 1 (ACTION 2): Do an external Ultrasonic (UT) Inspection of the left side fuselage skin for any crack.
OPTION 2 (ACTION 1): Do an internal DET Inspection of the left side fuselage skin for any crack.
OPTION 2 (ACTION 2): Do an internal surface High Frequency Eddy Current (HFEC) Inspection of the left side fuselage skin for any crack.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 16, 2023 777-53A0100 RB 11 of 141 REQUIREMENTS BULLETIN 777-53A0100
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Group 1, Configuration 2, 4:
Table 2: Left Side - Inspection of Fuselage Skin Common to the Underwing Longeron (UWL) between STA 1014 and STA 1035, at Stringer S-37 Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time (Whichever Occurs Later) ActionCondition 2,500 flight cycles or 20,000 flight hours, whichever occurs first. (c) --CONDITION 1, OPTION 1 (ACTION 1): Repeat the external DET Inspection of the left side fuselage skin for any crack. (a) CONDITION 1: NO
CRACK FOUND AS A
RESULT OF OPTION 1 INSPECTIONS.
CONDITION 1, OPTION 1 (ACTION 2): Repeat the external UT Inspection of the left side fuselage skin for any crack. (a) --Within 2,200 flight cycles or 17,600 flight hours, whichever occur first.
CONDITION 1, OPTION 2 (ACTION 1): Do the internal DET inspection of the left side fuselage skin for any crack. (a)(b) CONDITION 1, OPTION 2 (ACTION 2): Do the internal surface HFEC Inspection of the left side fuselage skin for any crack. (a)(b) --Within 2,200 flight cycles or 17,600 flight hours, whichever occurs first.
CONDITION 2, OPTION 1 (ACTION 1): Do the external DET Inspection of the left side fuselage skin for any crack. (a)(b) CONDITION 2: NO
CRACK FOUND AS A
RESULT OF OPTION 2 INSPECTIONS.
CONDITION 2, OPTION 1 (ACTION 2): Do the external UT Inspection of the left side fuselage skin for any crack.
(a)(b) 2,200 flight cycles or 17,600 flight hours, whichever occurs first.
--CONDITION 2, OPTION 2 (ACTION 1): Repeat the internal DET Inspection of the left side fuselage skin for any crack. (a) CONDITION 2, OPTION 2 (ACTION 2): Repeat the internal surface HFEC Inspection of the left side fuselage skin for any crack. (a) Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 16, 2023 777-53A0100 RB 12 of 141 REQUIREMENTS BULLETIN 777-53A0100