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Commercial Airplanes 777 Requirements Bulletin ALERT Number: 777-57A0123 RB Original Issue: July 08, 2021 ATA System: 5726 2751 SUBJECT: WINGS - Outer Wing - Number 1, Number 2, Number 7 and Number 8 Outboard Flap Support at the Wing Rear Spar Nut and Shim - Inspection and Change 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Unpublished Work.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: July 08, 2021 777-57A0123 RB 1 of 93
5.0
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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BLANK PAGE
Table of Contents
1. EFFECTIVITY5
A. Airplanes5
B. Spares Affected7
2. CONCURRENT REQUIREMENTS8
3. COMPLIANCE8
4. APPROVAL19
5. ACCOMPLISHMENT INSTRUCTIONS21
A. General Information21
B. Work Instructions22
FIGURE 1: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR NUT AND SHIM INSPECTION
.42
FIGURE 2: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR NUT AND SHIM INSPECTION
.44
FIGURE 3: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR NUT AND SHIM INSPECTION
.46
FIGURE 4: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR NUT AND SHIM INSPECTION
.48
FIGURE 5: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION50
FIGURE 6: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION53
FIGURE 7: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION55
FIGURE 8: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION58
FIGURE 9: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION60
FIGURE 10: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION63
FIGURE 11: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION66
FIGURE 12: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION69
FIGURE 13: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION72
FIGURE 14: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION75
FIGURE 15: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION78
FIGURE 16: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION81
FIGURE 17: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION84
FIGURE 18: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION87
FIGURE 19: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION89
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FIGURE 20: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION92
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Commercial Airplanes 777 Requirements Bulletin ALERT Number: 777-57A0123 RB Original Issue: July 08, 2021 ATA System: 5726 2751 SUBJECT: WINGS - Outer Wing - Number 1, Number 2, Number 7 and Number 8 Outboard Flap Support at the Wing Rear Spar Nut and Shim - Inspection and Change
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) 1-1566, 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, 1689-1699 in 1 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/-200LR/-300/-300ER/777F airplanes.- 1 Airplane Models:
777-200, 777-200LR, 777-300, 777-300ER, 777F GroupVariable Number 1WA001 - WA017 1WA076 - WA080 GroupVariable Number 1WA086 - WA093 1WA101 - WA104 GroupVariable Number 1WA116 - WA119 1WA131 - WA137 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 08, 2021 777-57A0123 RB 5 of 93
GroupVariable Number 1WA171 - WA175 1WA196 - WA198 1WA206 - WA212 1WA221 - WA223 1WA231 - WA232 1WA241 - WA250 1WA261 - WA266 1WA281 - WA283 1WA301 - WA304 1WB001 - WB021 1WB031 - WB046 1WB051 - WB088 1WB101 - WB106 1WB121 - WB125 1WB131 - 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 GroupVariable Number 1WB481 - WB484 1WB501 - WB512 1WB531 - WB537 1WB551 - WB554 1WB591 - WB597 1WB601 - WB606 1WB611 - WB622 1WB631 - WB638 1WB646 - WB649 1WC051 - WC073 1WC101 - WC104 1WC111 - WC120 1WC221 - WC224 1WC241 - WC243 1WC281 - WC290 1WC301 - WC308 1WC361 - WC364 1WC371 - WC374 1WC381 - WC395 1WC441 1WC446 - WC449 1WC456 - WC459 1WC486 - WC493 1WC506 - WC508 1WC521 - WC522 1WC531 - WC536 1WC546 - WC548 1WC556 1WC566 - WC567 1WC571 - WC574 1WC581 1WC586 - WC587 1WC591 - WC595 GroupVariable Number 1WD001 - WD002 1WD011 - WD018 1WD031 - WD036 1WD046 - WD055 1WD066 - WD075 1WD081 - WD089 1WD091 1WD096 1WD101 - WD106 1WD111 - WD112 1WD116 - WD117 1WD121 - WD123 1WD156 1WD501 - WD513 1WD521 - WD541 1WD546 - WD554 1WD561 - WD573 1WD581 - WD599 1WD606 - WD609 1WD621 - WD632 1WD651 - WD665 1WD671 - WD677 1WD691 - WD709 1WD741 - WD752 1WD761 - WD771 1WD786 - WD788 1WD796 - WD837 1WD846 - WD867 1WD871 - WD918 1WD921 - WD957 1WD966 - WD970 1WD981 - WD982 1WD986 - WD987 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1WD991 - WD996 1WE001 - WE007 1WE011 - WE012 1WE021 - WE026 1WE031 - WE040 1WE051 - WE057 1WE071 - WE078 1WE081 - WE084 1WE091 - WE095 1WE126 - WE178 1WE186 - WE219 1WE226 - WE231 1WE236 - WE253 1WE261 - WE267 1WE271 - WE278 1WE291 - WE298 1WE301 - WE320 1WE331 - WE356 1WE366 - WE368 1WE376 - WE377 1WE381 1WE386 - WE387 1WE391 - WE392 1WE396 - WE411 1WE416 - WE420 1WE426 - WE431 1WE436 - WE446 1WE451 - WE484 1WE486 - WE493 1WE495 - WE499 GroupVariable Number 1WE501 - WE504 1WE511 - WE516 1WE526 - WE528 1WE536 - WE549 1WE556 - WE573 1WE576 - WE587 1WE591 1WE601 - WE605 1WE626 - WE627 1WE631 1WE641 - WE642 1WE646 - WE647 1WE651 - WE661 1WE666 - WE677 1WE681 - WE689 1WE701 - WE705 1WE711 - WE712 1WE731 - WE732 1WE736 - WE740 1WE746 - WE772 1WE776 - WE786 1WE791 - WE792 1WE796 - WE798 1WE801 - WE806 1WE811 - WE812 1WE826 - WE828 1WE831 - WE835 1WE851 - WE853 1WE856 - WE857 1WE861 - WE863 GroupVariable Number 1WE866 - WE868 1WE871 1WF001 - WF004 1WF016 - WF029 1WF031 - WF043 1WF046 - WF077 1WF081 - WF088 1WF096 - WF101 1WF106 - WF109 1WF111 - WF124 1WF131 - WF144 1WF146 - WF147 1WF151 - WF152 1WF156 - WF173 1WF176 - WF184 1WF191 1WF201 1WF206 - WF217 1WF221 - WF225 1WF231 - WF248 1WF256 - WF258 1WF261 - WF262 1WF266 - WF278 1WF281 - WF288 1WF296 1WF301 1WF311 - WF313 1WF321 -- -- B. Spares Affected None.
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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 777-57A0123 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 777-57A0123 RB mandatory.
Accomplish the required action(s), based on the applicable condition(s) in Table(s) 1 through 3, 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.
Table 1: WORK PACKAGE 1: Left Wing - Outboard Flap Support Number 1 and Number 2 Inspection.
Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs First) ActionCondition -Within 1,250 flight cycles after the Original Issue date of Requirements Bulletin 777- 57A0123 RB.
Within 4,000 flight hours after the Original Issue date of Requirements Bulletin 777- 57A0123 RB.
Do a detailed inspection of the fasteners and shim, at the wing rear spar at Outboard Flap Support Number 1 and Number 2, for missing nuts, loose nuts, to determine thread protrusion, shim migration, gapping between shim and wing lower skin, shim and flap support fitting.
All airplanes.
4,000 flight hours, or 1,250 flight cycles, whichever occurs first.
-CONDITION 1 (ACTION
1): Repeat a detailed inspection of the fasteners and shim, at the wing rear spar at Outboard Flap Support Number 1 and Number 2, for missing nuts, loose nuts, to determine thread protrusion, shim migration, gapping between shim and wing lower skin, shim and flap support fitting. (a) CONDITION 1: NO MISS-
ING NUT, NO LOOSE
NUT, AT LEAST ONE
FASTENER THREAD
PROTRUDES BEYOND
THE NUT ON ALL FAS-
TENERS, NO SHIM MI-
GRATION AND GAPS LESS THAN 0.01 INCH
BETWEEN SHIM AND
WING LOWER SKIN OR
SHIM AND FLAP SUP- PORT FITTING.
-At the times specified in Table 3.CONDITION 1 (ACTION
2): Do the actions specified in Table 3.
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Table 1: WORK PACKAGE 1: Left Wing - Outboard Flap Support Number 1 and Number 2 Inspection.
Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs First) ActionCondition -At the times specified in Table 3.Do the actions specified in Table 3.
CONDITION 2: ANY
MISSING NUT, ANY
LOOSE NUT, ANY FAS-
TENER PROTRUDES
LESS THAN ONE
THREAD BEYOND THE
NUT, ANY SHIM MIGRA-
TION OR ANY GAP
GREATER THAN OR EQUAL TO 0.01 INCH BE-
TWEEN SHIM AND WING
LOWER SKIN OR SHIM
AND FLAP SUPPORT FITTING.
(a) Accomplishment of the fastener and shim change in WORK PACKAGE 3 is a terminating action for this repeat inspection.
Table 2: WORK PACKAGE 2: Right Wing - Outboard Flap Support Number 7 and Number 8 Inspection.
Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs First) ActionCondition -Within 1,250 flight cycles after the Original Issue date of Requirements Bulletin 777- 57A0123 RB.
Within 4,000 flight hours after the Original Issue date of Requirements Bulletin 777- 57A0123 RB.
Do a detailed inspection of the fasteners and shim, at the wing rear spar at Outboard Flap Support Number 7 and Number 8, for missing nuts, loose nuts, to determine thread protrusion, shim migration, gapping between shim and wing lower skin, shim and flap support fitting.
All airplanes.
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Table 2: WORK PACKAGE 2: Right Wing - Outboard Flap Support Number 7 and Number 8 Inspection.
Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs First) ActionCondition 4,000 flight hours, or 1,250 flight cycles, whichever occurs first.
-CONDITION 3 (ACTION
1): Repeat a detailed inspection of the fasteners and shim, at the wing rear spar at Outboard Flap Support Number 7 and Number 8, for missing nuts, loose nuts, to determine thread protrusion, shim migration, gapping between shim and wing lower skin, shim and flap support fitting. (a) CONDITION 3: NO MISS-
ING NUT, NO LOOSE
NUT, AT LEAST ONE
FASTENER THREAD
PROTRUDES BEYOND
THE NUT ON ALL FAS-
TENERS, NO SHIM MI-
GRATION AND GAPS LESS THAN 0.01 INCH
BETWEEN SHIM AND
WING LOWER SKIN OR
SHIM AND FLAP SUP- PORT FITTING.
-At the times specified in Table 3.CONDITION 3 (ACTION
2): Do the actions specified in Table 3.
-At the times specified in Table 3.Do the actions specified in Table 3.
CONDITION 4: ANY
MISSING NUT, ANY
LOOSE NUT, ANY FAS-
TENER PROTRUDES
LESS THAN ONE
THREAD BEYOND THE
NUT, ANY SHIM MIGRA-
TION OR ANY GAP
GREATER THAN OR EQUAL TO 0.01 INCH BE-
TWEEN SHIM AND WING
LOWER SKIN OR SHIM
AND FLAP SUPPORT FITTING.
(a) Accomplishment of the fastener and shim change in WORK PACKAGE 3 is a terminating action for this repeat inspection.
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Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number 2, Number 7 and Number 8 Change.
Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs First) ActionCondition -Within 8,000 flight cycles after the Original Issue date of Requirements Bulletin 777- 57A0123 RB.
Within 32,000 flight hours after the Original Issue date of Requirements Bulletin 777- 57A0123 RB.
Remove the inboard fasteners and shim at Outboard Flap Support Number 1 and do a detailed inspection of the shim, flap support mechanism and wing lower skin for any damage.
Airplanes that have NO
MISSING NUT, NO
LOOSE NUT, AT LEAST
ONE FASTENER THREAD
PROTRUDES BEYOND
THE NUT ON ALL FAS-
TENERS, NO SHIM MI-
GRATION AND GAPS LESS THAN 0.01 INCH
BETWEEN SHIM AND
WING LOWER SKIN OR
SHIM AND FLAP SUP- PORT FITTING which resulted from Table 1 CONDI- TION 1 and Table 2 CON- DITION 3.
-Before further flight.Remove the inboard fasteners and shim at Outboard Flap Support Number 1 and do a detailed inspection of the shim, flap support mechanism and wing lower skin for any damage.
Airplanes that have ANY
MISSING NUT, LOOSE
NUT, ANY FASTENER
PROTRUDES LESS THAN
ONE THREAD, SHIM MI-
GRATION OR GAP
GREATER THAN OR EQUAL TO 0.01 INCH BE-
TWEEN SHIM AND WING
LOWER SKIN OR SHIM
AND FLAP SUPPORT FITTING which resulted from Table 1 CONDITION 2 or Table 2 CONDITION
4.
-Before further flight.CONDITION 5 (ACTION
1): Install new inboard fasteners and shim at the Outboard Flap Support Number 1.
CONDITION 5: NO SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP SUPPORT NUMBER 1 IN-
BOARD FASTENER LOCA- TIONS.
-Before further flight.CONDITION 5 (ACTION
2): Remove the outboard fasteners and shim at Outboard Flap Support Number 1 and do a detailed inspection of the shim, flap support mechanism and wing lower skin for any damage.
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Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number 2, Number 7 and Number 8 Change.
Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs First) ActionCondition -Before further flight.CONDITION 6 (ACTION
1): Contact The Boeing Company for repair instructions and do the repair.
CONDITION 6: ANY SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP SUPPORT NUMBER 1 IN-
BOARD FASTENER LOCA- TIONS.
-Before further flight.CONDITION 6 (ACTION
2): Install new inboard fasteners and shim at the Outboard Flap Support Number 1.
-Before further flight.CONDITION 6 (ACTION
3): Remove the outboard fasteners and shim at Outboard Flap Support Number 1 and do a detailed inspection of the shim, flap support mechanism and wing lower skin for any damage.
-Before further flight.CONDITION 7 (ACTION
1): Install new outboard fasteners and shim at the Outboard Flap Support Number 1.
CONDITION 7: NO SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP SUPPORT NUMBER 1
OUTBOARD FASTENER LOCATIONS.
-Before further flight.CONDITION 7 (ACTION
2): Remove the inboard fasteners and shim at Outboard Flap Support Number 2 and do a detailed inspection of the shim, flap support mechanism and wing lower skin for any damage.
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