# Boeing Alert Requirements Bulletin 777-57A0123 RB: No revision named

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- Title as filed: RB-777-57A0123-00 RB
- Pages: 93
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### Page 1

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Unpublished Work.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
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5.0

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Table of Contents
1. EFFECTIVITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
A. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
B. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. CONCURRENT REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. COMPLIANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. APPROVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
A. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
B. Work Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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 INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
FIGURE 6: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
FIGURE 7: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
FIGURE 8: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
FIGURE 9: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
FIGURE 10: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
FIGURE 11: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
FIGURE 12: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
FIGURE 13: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
FIGURE 14: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
FIGURE 15: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
FIGURE 16: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
FIGURE 17: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
FIGURE 18: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
FIGURE 19: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
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FIGURE 20: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
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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
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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
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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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### Page 8

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 af-
ter the Original
Issue date of
Requirements
Bulletin 777-
57A0123 RB.
Within 4,000
flight hours after
the Original Is-
sue date of Re-
quirements Bul-
letin 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 migra-
tion, gapping between
shim and wing lower skin,
shim and flap support fit-
ting.
All airplanes.
4,000 flight hours,
or 1,250 flight cy-
cles, whichever oc-
curs first.
-CONDITION 1 (ACTION
1): Repeat a detailed in-
spection 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 deter-
mine 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 speci-
fied in Table 3.
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### Page 9

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 af-
ter the Original
Issue date of
Requirements
Bulletin 777-
57A0123 RB.
Within 4,000
flight hours after
the Original Is-
sue date of Re-
quirements Bul-
letin 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 migra-
tion, gapping between
shim and wing lower skin,
shim and flap support fit-
ting.
All airplanes.
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### Page 10

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 cy-
cles, whichever oc-
curs first.
-CONDITION 3 (ACTION
1): Repeat a detailed in-
spection 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 deter-
mine 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 speci-
fied 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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### Page 11

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 af-
ter the Original
Issue date of
Requirements
Bulletin 777-
57A0123 RB.
Within 32,000
flight hours after
the Original Is-
sue date of Re-
quirements Bul-
letin 777-
57A0123 RB.
Remove the inboard fas-
teners and shim at Out-
board Flap Support Num-
ber 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 re-
sulted from Table 1 CONDI-
TION 1 and Table 2 CON-
DITION 3.
-Before further flight.Remove the inboard fas-
teners and shim at Out-
board Flap Support Num-
ber 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 de-
tailed inspection of the
shim, flap support mecha-
nism and wing lower skin
for any damage.
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### Page 12

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 in-
structions and do the re-
pair.
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 de-
tailed inspection of the
shim, flap support mecha-
nism 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 de-
tailed inspection of the
shim, flap support mecha-
nism 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 8 (ACTION
1): Contact The Boeing
Company for repair in-
structions and do the re-
pair.
CONDITION 8: ANY SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP
SUPPORT NUMBER 1
OUTBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 8 (ACTION
2): Install new outboard
fasteners and shim at the
Outboard Flap Support
Number 1.
-Before further flight.CONDITION 8 (ACTION
3): Remove the inboard
fasteners and shim at
Outboard Flap Support
Number 2 and do a de-
tailed inspection of the
shim, flap support mecha-
nism and wing lower skin
for any damage.
-Before further flight.CONDITION 9 (ACTION
1): Install new inboard
fasteners and shim at the
Outboard Flap Support
Number 2.
CONDITION 9: NO SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP
SUPPORT NUMBER 2 IN-
BOARD FASTENER LOCA-
TIONS.
-Before further flight.CONDITION 9 (ACTION
2): Remove the outboard
fasteners and shim at
Outboard Flap Support
Number 2 and do a de-
tailed inspection of the
shim, flap support mecha-
nism 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 10 (ACTION
1): Contact The Boeing
Company for repair in-
structions and do the re-
pair.
CONDITION 10: ANY
SHIM, FLAP SUPPORT
MECHANISM OR WING
LOWER SKIN DAMAGE
FOUND AT OUTBOARD
FLAP SUPPORT NUMBER
2 INBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 10 (ACTION
2): Install new inboard
fasteners and shim at the
Outboard Flap Support
Number 2.
-Before further flight.CONDITION 10 (ACTION
3): Remove the outboard
fasteners and shim at
Outboard Flap Support
Number 2 and do a de-
tailed inspection of the
shim, flap support mecha-
nism and wing lower skin
for any damage.
-Before further flight.CONDITION 11 (ACTION
1): Install new outboard
fasteners and shim at the
Outboard Flap Support
Number 2.
CONDITION 11: NO SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP
SUPPORT NUMBER 2
OUTBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 11 (ACTION
2): Remove the inboard
fasteners and shim at
Outboard Flap Support
Number 7 and do a de-
tailed inspection of the
shim, flap support mecha-
nism 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 12 (ACTION
1): Contact The Boeing
Company for repair in-
structions and do the re-
pair.
CONDITION 12: ANY
SHIM, FLAP SUPPORT
MECHANISM OR WING
LOWER SKIN DAMAGE
FOUND AT OUTBOARD
FLAP SUPPORT NUMBER
2 OUTBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 12 (ACTION
2): Install new outboard
fasteners and shim at the
Outboard Flap Support
Number 2.
-Before further flight.CONDITION 12 (ACTION
3): Remove the inboard
fasteners and shim at
Outboard Flap Support
Number 7 and do a de-
tailed inspection of the
shim, flap support mecha-
nism and wing lower skin
for any damage.
-Before further flight.CONDITION 13 (ACTION
1): Install new inboard
fasteners and shim at the
Outboard Flap Support
Number 7.
CONDITION 13: NO SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP
SUPPORT NUMBER 7 IN-
BOARD FASTENER LOCA-
TIONS.
-Before further flight.CONDITION 13 (ACTION
2): Remove the outboard
fasteners and shim at
Outboard Flap Support
Number 7 and do a de-
tailed inspection of the
shim, flap support mecha-
nism and wing lower skin
for any damage.
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### Page 16

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 14 (ACTION
1): Contact The Boeing
Company for repair in-
structions and do the re-
pair.
CONDITION 14: ANY
SHIM, FLAP SUPPORT
MECHANISM OR WING
LOWER SKIN DAMAGE
FOUND AT OUTBOARD
FLAP SUPPORT NUMBER
7 INBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 14 (ACTION
2): Install new inboard
fasteners and shim at the
Outboard Flap Support
Number 7.
-Before further flight.CONDITION 14 (ACTION
3): Remove the outboard
fasteners and shim at
Outboard Flap Support
Number 7 and do a de-
tailed inspection of the
shim, flap support mecha-
nism and wing lower skin
for any damage.
-Before further flight.CONDITION 15 (ACTION
1): Install new outboard
fasteners and shim at the
Outboard Flap Support
Number 7.
CONDITION 15: NO SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP
SUPPORT NUMBER 7
OUTBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 15 (ACTION
2): Remove the inboard
fasteners and shim at
Outboard Flap Support
Number 8 and do a de-
tailed inspection of the
shim, flap support mecha-
nism and wing lower skin
for any damage.
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### Page 17

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 16 (ACTION
1): Contact The Boeing
Company for repair in-
structions and do the re-
pair.
CONDITION 16: ANY
SHIM, FLAP SUPPORT
MECHANISM OR WING
LOWER SKIN DAMAGE
FOUND AT OUTBOARD
FLAP SUPPORT NUMBER
7 OUTBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 16 (ACTION
2): Install new outboard
fasteners and shim at the
Outboard Flap Support
Number 7.
-Before further flight.CONDITION 16 (ACTION
3): Remove the inboard
fasteners and shim at
Outboard Flap Support
Number 8 and do a de-
tailed inspection of the
shim, flap support mecha-
nism and wing lower skin
for any damage.
-Before further flight.CONDITION 17 (ACTION
1): Install new inboard
fasteners and shim at the
Outboard Flap Support
Number 8.
CONDITION 17: NO SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP
SUPPORT NUMBER 8 IN-
BOARD FASTENER LOCA-
TIONS.
-Before further flight.CONDITION 17 (ACTION
2): Remove the outboard
fasteners and shim at
Outboard Flap Support
Number 8 and do a de-
tailed inspection of the
shim, flap support mecha-
nism and wing lower skin
for any damage.
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### Page 18

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 18 (ACTION
1): Contact The Boeing
Company for repair in-
structions and do the re-
pair.
CONDITION 18: ANY
SHIM, FLAP SUPPORT
MECHANISM OR WING
LOWER SKIN DAMAGE
FOUND AT OUTBOARD
FLAP SUPPORT NUMBER
8 INBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 18 (ACTION
2): Install new inboard
fasteners and shim at the
Outboard Flap Support
Number 8.
-Before further flight.(CONDITION 18 (AC-
TION 3): Remove the
outboard fasteners and
shim at Outboard Flap
Support Number 8 and do
a detailed inspection of
the shim, flap support
mechanism and wing
lower skin for any dam-
age.
-Before further flight.Install new outboard fas-
teners and shim at the
Outboard Flap Support
Number 8.
CONDITION 19: NO SHIM,
FLAP SUPPORT MECHA-
NISM OR WING LOWER
SKIN DAMAGE FOUND
AT OUTBOARD FLAP
SUPPORT NUMBER 8
OUTBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 20 (ACTION
1): Contact The Boeing
Company for repair in-
structions and do the re-
pair.
CONDITION 20: ANY
SHIM, FLAP SUPPORT
MECHANISM OR WING
LOWER SKIN DAMAGE
FOUND AT OUTBOARD
FLAP SUPPORT NUMBER
8 OUTBOARD FASTENER
LOCATIONS.
-Before further flight.CONDITION 20 (ACTION
2): Install new outboard
fasteners and shim at the
Outboard Flap Support
Number 8.
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### Page 19

4. APPROVAL
This Requirements Bulletin was examined by the Federal Aviation Administration (FAA). The changes
specified in this document comply with the applicable regulations and are FAA approved, as well as European
Union Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved
airplanes listed in this Requirements Bulletin effectivity. This document and its approval were based on the
airplane in its original Boeing delivery configuration or as modified by other Boeing changes.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected by
this Requirements Bulletin, the operator is responsible for obtaining appropriate regulatory agency approval
before incorporating this Requirements Bulletin.
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### Page 21

5.    ACCOMPLISHMENT INSTRUCTIONS
A. GENERAL INFORMATION
NOTE: 1. This is an Enhanced Required for Compliance document. There will be a separate
Service Bulletin (SB) and a separate Requirements Bulletin (RB). If an RB is mandated
by an Airworthiness Directive (AD), then all applicable requirements specified in the
RB must be done. For the related SB, some locations are marked RC Start and RC
End to identify the requirements that are restated from the RB. For the related SB,
the areas between RC Start and RC End, including sub-steps and any figures
identified between RC Start and RC End, must be done to comply with the AD.
Therefore, an Alternative Method of Compliance (AMOC) is required for any deviations
to steps between RC Start and RC End, including substeps and identified figures.
For the related SB, the steps not between RC Start and RC End may be deviated
from using accepted methods in accordance with the operator's maintenance or
inspection program without obtaining approval of an AMOC; this is provided that the
steps between RC Start and RC End, including sub-steps and identified figures, can
still be done as specified, and the airplane can be put back in an airworthy condition.
Figures not required for compliance are omitted from the RB.
2. 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.
3. The compliance times for the actions in WORK INSTRUCTIONS are in Compliance.
4. Boeing Service Letter 777-SL-51-013, Damage Reporting and Repair Plan/Design
Guidelines, is an acceptable procedure to request information from Boeing for
additional structural repair instructions. The Service Letter describes what information
must be provided to Boeing before a structural repair can be provided.
5. These work instructions refer to procedures included in other Boeing documents.
When the words "refer to" are used and the operator has an accepted alternative
procedure, the accepted alternative procedure can be used. When the words "in
accordance with" are included in the instruction, the procedure in the Boeing document
must be used.
6. Where the work instructions include installation of a kept part, a new or serviceable
part with the same part number can be installed as an alternative to the kept part.
7. If it is necessary to remove more parts for access, you can remove those parts. If
you can get access without removing identified parts, it is not necessary to remove
all of the identified parts. Jacking and shoring limitations must be observed.
8. Use the approved fastener, process and material substitutions (except fastener
substitution is not allowed) in accordance with SRM Chapter 51.
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### Page 22

9. A Detailed Inspection is defined as: An intensive examination of a specific item,
installation or assembly to detect damage, failure or irregularity. This could include
tactile assessment in which a component or assembly can be checked for
tightness/security. Available lighting is normally supplemented with a direct source
of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors
and magnifying lenses may be necessary. Surface cleaning and elaborate access
procedures may be required.
B. WORK INSTRUCTIONS
Actions Required for Compliance
1. Requirements:
Table 1: WORK PACKAGE 1: Left Wing - Outboard Flap Support Number 1 and Number 2 In-
spection.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
PART 1: OPEN AC-
CESS.
-Do a detailed inspec-
tion of the fasteners
and shim, at the wing
rear spar at Out-
board Flap Support
Number 1 and Num-
ber 2, for missing
nuts, loose nuts, to
determine thread
protrusion, shim mi-
gration, gapping be-
tween shim and wing
lower skin, shim and
flap support fitting.
All airplanes.
Refer to APPENDIX
A for thread protru-
sion guidance.
FIGURE 1
and
FIGURE 2
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### Page 23

Table 1: WORK PACKAGE 1: Left Wing - Outboard Flap Support Number 1 and Number 2 In-
spection.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
PART 2: CLOSE
ACCESS.
-CONDITION 1 (AC-
TION 1): Repeat a
detailed inspection of
the fasteners and
shim, at the wing
rear spar at Out-
board Flap Support
Number 1 and Num-
ber 2, for missing
nuts, loose nuts, to
determine thread
protrusion, shim mi-
gration, gapping be-
tween shim and wing
lower skin, shim and
flap support fitting.
(a)
CONDITION 1: NO
MISSING NUT, NO
LOOSE NUT, AT
LEAST ONE FAS-
TENER THREAD
PROTRUDES BE-
YOND THE NUT ON
ALL FASTENERS,
NO SHIM MIGRA-
TION AND GAPS
LESS THAN 0.01
INCH BETWEEN
SHIM AND WING
LOWER SKIN OR
SHIM AND FLAP
SUPPORT FITTING.
Refer to APPENDIX
A for thread protru-
sion guidance.
FIGURE 1
and
FIGURE 2
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-CONDITION 1 (AC-
TION 2): Do the ac-
tions specified in Ta-
ble 3.
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-Do the actions speci-
fied in Table 3.
CONDITION 2: ANY
MISSING NUT, ANY
LOOSE NUT, ANY
FASTENER PRO-
TRUDES LESS
THAN ONE
THREAD BEYOND
THE NUT, ANY
SHIM MIGRATION
OR ANY GAP
GREATER THAN
OR EQUAL TO 0.01
INCH BETWEEN
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 termi-
nating action for this repeat inspection.
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### Page 24

Table 2: WORK PACKAGE 2: Right Wing - Outboard Flap Support Number 7 and Number 8
Inspection.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
PART 1: OPEN AC-
CESS.
-Do a detailed inspec-
tion of the fasteners
and shim, at the wing
rear spar at Out-
board Flap Support
Number 7 and Num-
ber 8, for missing
nuts, loose nuts, to
determine thread
protrusion, shim mi-
gration, gapping be-
tween shim and wing
lower skin, shim and
flap support fitting.
All airplanes.
Refer to APPENDIX
A for thread protru-
sion guidance.
FIGURE 3
and
FIGURE 4
PART 2: CLOSE
ACCESS.
-CONDITION 3 (AC-
TION 1): Repeat a
detailed inspection of
the fasteners and
shim, at the wing
rear spar at Out-
board Flap Support
Number 7 and Num-
ber 8, for missing
nuts, loose nuts, to
determine thread
protrusion, shim mi-
gration, gapping be-
tween shim and wing
lower skin, shim and
flap support fitting.
(a)
CONDITION 3: NO
MISSING NUT, NO
LOOSE NUT, AT
LEAST ONE FAS-
TENER THREAD
PROTRUDES BE-
YOND THE NUT ON
ALL FASTENERS,
NO SHIM MIGRA-
TION AND GAPS
LESS THAN 0.01
INCH BETWEEN
SHIM AND WING
LOWER SKIN OR
SHIM AND FLAP
SUPPORT FITTING.
Refer to APPENDIX
A for thread protru-
sion guidance.
FIGURE 3
and
FIGURE 4
CONDITION 3 (AC-
TION 2): Do the ac-
tions specified in Ta-
ble 3.
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### Page 25

Table 2: WORK PACKAGE 2: Right Wing - Outboard Flap Support Number 7 and Number 8
Inspection.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
PART 5: RIGHT
WING OUTBOARD
FLAP SUPPORT
ACCESS
-Do the actions speci-
fied in Table 3.
CONDITION 4: ANY
MISSING NUT, ANY
LOOSE NUT, ANY
FASTENER PRO-
TRUDES LESS
THAN ONE
THREAD BEYOND
THE NUT, ANY
SHIM MIGRATION
OR ANY GAP
GREATER THAN
OR EQUAL TO 0.01
INCH BETWEEN
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 termi-
nating action for this repeat inspection.
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### Page 26

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-Remove the inboard
fasteners and shim
at Outboard Flap
Support Number 1
and do a detailed in-
spection of the shim,
flap support mecha-
nism and wing lower
skin for any damage.
Airplanes that have
NO MISSING NUT,
NO LOOSE NUT, AT
LEAST ONE FAS-
TENER THREAD
PROTRUDES BE-
YOND THE NUT ON
ALL FASTENERS,
NO SHIM MIGRA-
TION AND GAPS
LESS THAN 0.01"
BETWEEN SHIM
AND WING LOWER
SKIN OR SHIM AND
FLAP SUPPORT
FITTING which result-
ed from Table 1
CONDITION 1 and
Table 2 CONDITION
3.
-FIGURE 5
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-Remove the inboard
fasteners and shim
at Outboard Flap
Support Number 1
and do a detailed in-
spection of the shim,
flap support mecha-
nism and wing lower
skin for any damage.
Airplanes that have
ANY MISSING NUT,
LOOSE NUT, ANY
FASTENER PRO-
TRUDES LESS
THAN ONE
THREAD, SHIM MI-
GRATION OR GAP
GREATER THAN
OR EQUAL TO 0.01
INCH BETWEEN
SHIM AND WING
LOWER SKIN OR
SHIM AND FLAP
SUPPORT FITTING
which resulted from
Table 1 CONDITION
2 or Table 2 CONDI-
TION 4.
-FIGURE 5
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### Page 27

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
-FIGURE 6CONDITION 5 (AC-
TION 1): Install new
inboard fasteners
and shim at the Out-
board Flap Support
Number 1.
CONDITION 5: NO
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 1
INBOARD FASTEN-
ER LOCATIONS.
PART 4: LEFT WING
OUTBOARD FLAP
SUPPORT CLOSE
ACCESS.
-
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-CONDITION 5 (AC-
TION 2): Remove the
outboard fasteners
and shim at Out-
board Flap Support
Number 1 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 7
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### Page 28

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
--CONDITION 6 (AC-
TION 1): Contact
The Boeing Compa-
ny for repair instruc-
tions and do the re-
pair.
CONDITION 6: ANY
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 1
INBOARD FASTEN-
ER LOCATIONS.
-FIGURE 6CONDITION 6 (AC-
TION 2): Install new
inboard fasteners
and shim at Out-
board Flap Support
Number 1.
PART 4: LEFT WING
OUTBOARD FLAP
SUPPORT CLOSE
ACCESS.
-
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-CONDITION 6 (AC-
TION 3): Remove the
outboard fasteners
and shim at Out-
board Flap Support
Number 1 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 7
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Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
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REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 29

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
-FIGURE 8CONDITION 7 (AC-
TION 1): Install new
outboard fasteners
and shim at the Out-
board Flap Support
Number 1.
CONDITION 7: NO
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 1
OUTBOARD FAS-
TENER LOCA-
TIONS.
PART 4: LEFT WING
OUTBOARD FLAP
SUPPORT CLOSE
ACCESS.
-
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-CONDITION 7 (AC-
TION 2): Remove the
inboard fasteners
and shim at Out-
board Flap Support
Number 2 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 9
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
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REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 30

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
--CONDITION 8 (AC-
TION 1): Contact
The Boeing Compa-
ny for repair instruc-
tions and do the re-
pair.
CONDITION 8: ANY
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 1
OUTBOARD FAS-
TENER LOCA-
TIONS.
-FIGURE 8CONDITION 8 (AC-
TION 2): Install new
outboard fasteners
and shim at the Out-
board Flap Support
Number 1.
PART 4: LEFT WING
OUTBOARD FLAP
SUPPORT CLOSE
ACCESS.
-
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-CONDITION 8 (AC-
TION 3): Remove the
inboard fasteners
and shim at Out-
board Flap Support
Number 2 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 9
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
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REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 31

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
-FIGURE 10CONDITION 9 (AC-
TION 1): Install new
inboard fasteners
and shim at the Out-
board Flap Support
Number 2.
CONDITION 9: NO
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 2
INBOARD FASTEN-
ER LOCATIONS.
PART 4: LEFT WING
OUTBOARD FLAP
SUPPORT CLOSE
ACCESS.
-
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-CONDITION 9 (AC-
TION 2): Remove the
outboard fasteners
and shim at Out-
board Flap Support
Number 2 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 11
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Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
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REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 32

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
--CONDITION 10 (AC-
TION 1): Contact
The Boeing Compa-
ny for repair instruc-
tions and do the re-
pair.
CONDITION 10:
ANY SHIM, FLAP
SUPPORT MECHA-
NISM OR WING
LOWER SKIN DAM-
AGE FOUND AT
OUTBOARD FLAP
SUPPORT NUMBER
2 INBOARD FAS-
TENER LOCA-
TIONS.
-FIGURE 10CONDITION 10 (AC-
TION 2): Install new
inboard fasteners
and shim at the Out-
board Flap Support
Number 2.
PART 4: LEFT WING
OUTBOARD FLAP
SUPPORT CLOSE
ACCESS.
-
PART 3: LEFT WING
OUTBOARD FLAP
SUPPORT ACCESS
-CONDITION 10 (AC-
TION 3): Remove the
outboard fasteners
and shim at Out-
board Flap Support
Number 2 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 11
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
32 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 33

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
-FIGURE 12CONDITION 11 (AC-
TION 1): Install new
outboard fasteners
and shim at the Out-
board Flap Support
Number 2.
CONDITION 11: NO
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 2
OUTBOARD FAS-
TENER LOCA-
TIONS.
PART 4: LEFT WING
OUTBOARD FLAP
SUPPORT CLOSE
ACCESS.
-
PART 5: RIGHT
WING OUTBOARD
FLAP SUPPORT
ACCESS
-CONDITION 11 (AC-
TION 2): Remove the
inboard fasteners
and shim at Out-
board Flap Support
Number 7 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 13
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
33 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 34

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
--CONDITION 12 (AC-
TION 1): Contact
The Boeing Compa-
ny for repair instruc-
tions and do the re-
pair.
CONDITION 12:
ANY SHIM, FLAP
SUPPORT MECHA-
NISM OR WING
LOWER SKIN DAM-
AGE FOUND AT
OUTBOARD FLAP
SUPPORT NUMBER
2 OUTBOARD FAS-
TENER LOCA-
TIONS.
-FIGURE 12CONDITION 12 (AC-
TION 2): Install new
outboard fasteners
and shim at the Out-
board Flap Support
Number 2.
PART 4: LEFT WING
OUTBOARD FLAP
SUPPORT CLOSE
ACCESS.
-
PART 5: RIGHT
WING OUTBOARD
FLAP SUPPORT
ACCESS
-CONDITION 12 (AC-
TION 3): Remove the
inboard fasteners
and shim at Out-
board Flap Support
Number 7 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 13
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
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REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 35

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
-FIGURE 14CONDITION 13 (AC-
TION 1): Install new
inboard fasteners
and shim at the Out-
board Flap Support
Number 7.
CONDITION 13: NO
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 7
INBOARD FASTEN-
ER LOCATIONS.
PART 6: RIGHT
WING OUTBOARD
FLAP SUPPORT
CLOSE ACCESS
-
PART 5: RIGHT
WING OUTBOARD
FLAP SUPPORT
ACCESS
-CONDITION 13 (AC-
TION 2): Remove the
outboard fasteners
and shim at Out-
board Flap Support
Number 7 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 15
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
35 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 36

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
--CONDITION 14 (AC-
TION 1): Contact
The Boeing Compa-
ny for repair instruc-
tions and do the re-
pair.
CONDITION 14:
ANY SHIM, FLAP
SUPPORT MECHA-
NISM OR WING
LOWER SKIN DAM-
AGE FOUND AT
OUTBOARD FLAP
SUPPORT NUMBER
7 INBOARD FAS-
TENER LOCA-
TIONS.
-FIGURE 14CONDITION 14 (AC-
TION 2): Install new
inboard fasteners
and shim at the Out-
board Flap Support
Number 7.
PART 6: RIGHT
WING OUTBOARD
FLAP SUPPORT
CLOSE ACCESS
-
PART 5: RIGHT
WING OUTBOARD
FLAP SUPPORT
ACCESS
-CONDITION 14 (AC-
TION 3): Remove the
outboard fasteners
and shim at Out-
board Flap Support
Number 7 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 15
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
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REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 37

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
-FIGURE 16CONDITION 15 (AC-
TION 1): Install new
outboard fasteners
and shim at the Out-
board Flap Support
Number 7.
CONDITION 15: NO
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 7
OUTBOARD FAS-
TENER LOCA-
TIONS.
PART 6: RIGHT
WING OUTBOARD
FLAP SUPPORT
CLOSE ACCESS
-
PART 5: RIGHT
WING OUTBOARD
FLAP SUPPORT
ACCESS
-CONDITION 15 (AC-
TION 2): Remove the
inboard fasteners
and shim at Out-
board Flap Support
Number 8 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 17
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
37 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 38

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
--CONDITION 16 (AC-
TION 1): Contact
The Boeing Compa-
ny for repair instruc-
tions and do the re-
pair.
CONDITION 16:
ANY SHIM, FLAP
SUPPORT MECHA-
NISM OR WING
LOWER SKIN DAM-
AGE FOUND AT
OUTBOARD FLAP
SUPPORT NUMBER
7 OUTBOARD FAS-
TENER LOCA-
TIONS.
-FIGURE 16CONDITION 16 (AC-
TION 2): Install new
outboard fasteners
and shim at the Out-
board Flap Support
Number 7.
PART 6: RIGHT
WING OUTBOARD
FLAP SUPPORT
CLOSE ACCESS
-
PART 5: RIGHT
WING OUTBOARD
FLAP SUPPORT
ACCESS
-CONDITION 16 (AC-
TION 3): Remove the
inboard fasteners
and shim at Out-
board Flap Support
Number 8 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 17
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
38 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 39

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
-FIGURE 18CONDITION 17 (AC-
TION 1): Install new
inboard fasteners
and shim at the Out-
board Flap Support
Number 8.
CONDITION 17: NO
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 8
INBOARD FASTEN-
ER LOCATIONS.
PART 6: RIGHT
WING OUTBOARD
FLAP SUPPORT
CLOSE ACCESS
-
PART 5: RIGHT
WING OUTBOARD
FLAP SUPPORT
ACCESS
-CONDITION 17 (AC-
TION 2): Remove the
outboard fasteners
and shim at Out-
board Flap Support
Number 8 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 19
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Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
39 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 40

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
--CONDITION 18 (AC-
TION 1): Contact
The Boeing Compa-
ny for repair instruc-
tions and do the re-
pair.
CONDITION 18:
ANY SHIM, FLAP
SUPPORT MECHA-
NISM OR WING
LOWER SKIN DAM-
AGE FOUND AT
OUTBOARD FLAP
SUPPORT NUMBER
8 INBOARD FAS-
TENER LOCA-
TIONS.
-FIGURE 18CONDITION 18 (AC-
TION 2): Install new
inboard fasteners
and shim at the Out-
board Flap Support
Number 8.
PART 6: RIGHT
WING OUTBOARD
FLAP SUPPORT
CLOSE ACCESS
-
PART 5: RIGHT
WING OUTBOARD
FLAP SUPPORT
ACCESS
-CONDITION 18 (AC-
TION 3): Remove the
outboard fasteners
and shim at Out-
board Flap Support
Number 8 and do a
detailed inspection of
the shim, flap sup-
port mechanism and
wing lower skin for
any damage.
-FIGURE 19
-FIGURE 20Install new outboard
fasteners and shim
at the Outboard Flap
Support Number 8.
CONDITION 19: NO
SHIM, FLAP SUP-
PORT MECHANISM
OR WING LOWER
SKIN DAMAGE
FOUND AT OUT-
BOARD FLAP SUP-
PORT NUMBER 8
OUTBOARD FAS-
TENER LOCA-
TIONS.
PART 6: RIGHT
WING OUTBOARD
FLAP SUPPORT
CLOSE ACCESS
-
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Copyright © Unpublished
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Original Issue: July 08, 2021
777-57A0123 RB
40 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 41

Table 3: WORK PACKAGE 3: Left and Right Wing - Outboard Flap Support Number 1, Number
2, Number 7, and Number 8 Fastener and Shim Change.
Refer to the listed
procedures in SB
777-57A0123 Origi-
nal Issue or later
approved revisions
as an accepted pro-
cedure.
Method of Compli-
ance
ActionCondition
--CONDITION 20 (AC-
TION 1): Contact
The Boeing Compa-
ny for repair instruc-
tions and do the re-
pair.
CONDITION 20:
ANY SHIM, FLAP
SUPPORT MECHA-
NISM OR WING
LOWER SKIN DAM-
AGE FOUND AT
OUTBOARD FLAP
SUPPORT NUMBER
8 OUTBOARD FAS-
TENER LOCA-
TIONS.
-FIGURE 20CONDITION 20 (AC-
TION 2): Install new
outboard fasteners
and shim at the Out-
board Flap Support
Number 8.
PART 6: RIGHT
WING OUTBOARD
FLAP SUPPORT
CLOSE ACCESS
-
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Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
41 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 42 (OCR)

REQUIREMENTS BULLETIN 777-57A0123
ALERT  ALERT
FLAP SUPPORT FITTING  WING LOWER SKIN  FLAP SUPPORT FITTING
MECHANISM ASSEMBLY NOT SHOWN FOR CLARITY
2963972
FIGURE 1: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR NUT AND SHIM INSPECTION
(SHEET 1 OF 2)
Original Issue: July 08, 2021
Export Controlled ECCN: 9E991  777-57A0123 RB
Copyright © Unpublished
Work - See page 1 for details.  42 of 93

### Page 43

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a) 4-NUTInspect1
(b)(c) 2-PHENOLIC SHIMInspect2
(c) 2-SHIMInspect
(d) 4-BOLTInspect3
(a) Do a detailed inspection of the nuts for any missing nut or any loose nut. Use hand pressure to check for
nut looseness.
(b) Do a detailed inspection of the shim for any shim migration.
(c) Do a detailed inspection of the shim for any gap between the wing lower skin, phenolic shim, shim and
flap support mechanism.
(d) Do a detailed inspection of the bolt to determine the number of threads visible beyond the nut. A minimum
of one thread, plus the chamfer must be visible beyond the nut.
FIGURE 1: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR NUT AND SHIM INSPECTION
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991
Copyright © Unpublished
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Original Issue: July 08, 2021
777-57A0123 RB
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REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 44 (OCR)

REQUIREMENTS BULLETIN 777-57A0123
ALERT  ALERT
FLAP SUPPORT FITTING  WING LOWER SKIN  FLAP SUPPORT FITTING
MECHANISM ASSEMBLY NOT SHOWN FOR CLARITY
FIGURE 2: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR NUT AND SHIM INSPECTION
(SHEET 1 OF 2)
Original Issue: July 08, 2021
Export Controlled ECCN: 9E991  777-57A0123 RB
Copyright © Unpublished
Work - See page 1 for details.  44 of 93

### Page 45

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a) 4-NUTInspect1
(b)(c) 2-PHENOLIC SHIMInspect2
(c) 2-SHIMInspect
(d) 4-BOLTInspect3
(a) Do a detailed inspection of the nuts for any missing nut or any loose nut. Use hand pressure to check for
nut looseness.
(b) Do a detailed inspection of the shim for any shim migration.
(c) Do a detailed inspection of the shim for any gap between the wing lower skin, phenolic shim, shim and
flap support mechanism.
(d) Do a detailed inspection of the bolt to determine the number of threads visible beyond the nut. A minimum
of one thread, plus the chamfer must be visible beyond the nut.
FIGURE 2: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR NUT AND SHIM INSPECTION
(SHEET 2 OF 2)
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45 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 46 (OCR)

REQUIREMENTS BULLETIN 777-57A0123
ALERT  ALERT
FWD
FLAP SUPPORT FITTING  WING LOWER SKIN  FLAP SUPPORT FITTING
MECHANISM ASSEMBLY NOT SHOWN FOR CLARITY
FIGURE 3: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR NUT AND SHIM INSPECTION
(SHEET 1 OF 2)
Original Issue: July 08, 2021
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.

### Page 47

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a) 4-NUTInspect1
(b)(c) 2-PHENOLIC SHIMInspect2
(c) 2-SHIMInspect
(d) 4-BOLTInspect3
(a) Do a detailed inspection of the nuts for any missing nut or any loose nut. Use hand pressure to check for
nut looseness.
(b) Do a detailed inspection of the shim for any shim migration.
(c) Do a detailed inspection of the shim for any gap between the wing lower skin, phenolic shim, shim and
flap support mechanism.
(d) Do a detailed inspection of the bolt to determine the number of threads visible beyond the nut. A minimum
of one thread, plus the chamfer must be visible beyond the nut.
FIGURE 3: OUTBOARD FLAP SUPPORT NUMBER 7 - WING REAR SPAR NUT AND SHIM INSPECTION
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
47 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 48 (OCR)

REQUIREMENTS BULLETIN 777-57A0123
ALERT  ALERT
FWD
FLAP SUPPORT FITTING  WING LOWER SKIN  FLAP SUPPORT FITTING
MECHANISM ASSEMBLY NOT SHOWN FOR CLARITY
FIGURE 4: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR NUT AND SHIM INSPECTION
(SHEET 1 OF 2)
Original Issue: July 08, 2021
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.

### Page 49

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a) 4-NUTInspect1
(b)(c) 2-PHENOLIC SHIMInspect2
(c) 2-SHIMInspect
(d) 4-BOLTInspect3
(a) Do a detailed inspection of the nuts for any missing nut or any loose nut. Use hand pressure to check for
nut looseness.
(b) Do a detailed inspection of the shim for any shim migration.
(c) Do a detailed inspection of the shim for any gap between the wing lower skin, phenolic shim, shim and
flap support mechanism.
(d) Do a detailed inspection of the bolt to determine the number of threads visible beyond the nut. A minimum
of one thread, plus the chamfer must be visible beyond the nut.
FIGURE 4: OUTBOARD FLAP SUPPORT NUMBER 8 - WING REAR SPAR NUT AND SHIM INSPECTION
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
49 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 50 (OCR)

REQUIREMENTS BULLETIN 777-57A0123
ALERT  ALERT
FLAP SUPPORT FITTING  WING LOWER SKIN  FLAP SUPPORT FITTING
MECHANISM ASSEMBLY NOT SHOWN FOR CLARITY
2964128
FIGURE 5: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION
(SHEET 1 OF 3)
Original Issue: July 08, 2021
Export Controlled ECCN: 9E991  777-57A0123 RB
Copyright © Unpublished
Work - See page 1 for details.  50 of 93

### Page 51

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
INSTALL A SUPPORT OR TRIPOD TO HOLD THE FLAP SUPPORT MECHANISM
STABLE DURING FASTENER REMOVAL. DO NOT REMOVE MORE THAN TWO BOLTS
AT THE SAME TIME. ONE ARM OF THE FLAP SUPPORT FITTING MUST BE FULLY
SECURED WITH FASTENERS AT ALL TIMES.
CAUTION
(a) 2-NUTRemove1
(a) 2-WASHERRemove
(a) 2-BOLTRemove
(a) 2-WASHERRemove
(b) 1113W1104-4SHIMRemove / Keep2
- 1113W1026-55PHENOLIC SHIMRemove
(c) 2113W1104-4SHIMClean3
(d) 1-WING LOWER SKINClean4
(d) 1-FLAP SUPPORT
MECHANISM
Clean
FIGURE 5: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION
(SHEET 2 OF 3)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
51 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 52

More DataQtyIdentificationNameTaskStep
(e) 1-WING LOWER SKINInspect5
(e) 1-FLAP SUPPORT
MECHANISM
Inspect
(f) 1113W1104-4SHIMInspect
(a) Refer to 777 AMM 27-51-22 as an accepted procedure.
(b) Make a note of the orientation of the shim for re-installation.
(c) Clean the metal shim. Remove the phenolic shim and clean sealant from the bonded metal shim. Refer
to 777 AMM 51-31-01 as an accepted procedure.
(d) Clean the wing lower skin and flap support mechanism mating surfaces. Refer to 777 AMM 51-31-01 as
an accepted procedure.
(e) Do a detailed inspection of the wing lower skin and flap support mechanism in the contact area of the
shim for any damage. Damage is defined as any corrosion, fretting, wear, galling or deformation.
(f) Do a detailed inspection of the shim for any damage. Damage is defined as any crack.
FIGURE 5: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
52 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 53 (OCR)

REQUIREMENTS BULLETIN 777-57A0123
ALERT  ALERT
FWD
FLAP SUPPORT FITTING  WING LOWER SKIN  FLAP SUPPORT FITTING
MECHANISM ASSEMBLY NOT SHOWN FOR CLARITY
FIGURE 6: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION
(SHEET 1 OF 2)
Original Issue: July 08, 2021
Export Controlled ECCN: 9E991  777-57A0123 RB
Copyright © Unpublished
Work - See page 1 for details.  53 of 93

### Page 54

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a) 1113W1104-4SHIMInstall (Kept)1
(a)(b)1691W0019-1SHIMInstall (New)
(c)(f) 2BACB30LE8K32BOLT, 12 PT HEADInstall (New)2
Under the bolt head.
(f)
2BACW10BP8CDWASHERInstall (New)
Under the nut. (d)(f)2BACW10BP8DPWASHERInstall (New)
(e)(f) 2BACN10HY8ACSELF-LOCKING NUTInstall (New)
(a) Apply BMS 5-95, Class B or Class C, fay surface seal to all shim surfaces. Refer to SOPM 20-50-19 as
an accepted procedure.
(b) Install the new shim against the wing lower skin.
(c) Install bolts wet with BMS 5-95, Class B, sealant. Refer to SOPM 20-50-19 as an accepted procedure.
(d) The use of up to two additional BACW10BP8DP washers under the nut is permitted if the grip length is
too long. Refer to SOPM 20-50-01 as an accepted procedure.
(e) Torque to 835-865 in-lbs and re-torque to same value. Refer to SOPM 20-50-01 as an accepted procedure.
(f) This joint is fuse critical, no fastener substitution is allowed.
FIGURE 6: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR INBOARD FASTENER AND
SHIM INSTALLATION
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
54 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 55 (OCR)

REQUIREMENTS BULLETIN 777-57A0123
ALERT  ALERT
FWD
FLAP SUPPORT FITTING  WING LOWER SKIN  FLAP SUPPORT FITTING
MECHANISM ASSEMBLY NOT SHOWN FOR CLARITY
FIGURE 7: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION
(SHEET 1 OF 3)
Original Issue: July 08, 2021
Export Controlled ECCN: 9E991  777-57A0123 RB
Copyright © Unpublished
Work - See page 1 for details.  55 of 93

### Page 56

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
INSTALL A SUPPORT OR TRIPOD TO HOLD THE FLAP SUPPORT MECHANISM
STABLE DURING FASTENER REMOVAL. DO NOT REMOVE MORE THAN TWO BOLTS
AT THE SAME TIME. ONE ARM OF THE FLAP SUPPORT FITTING MUST BE FULLY
SECURED WITH FASTENERS AT ALL TIMES.
CAUTION
(a) 2-NUTRemove1
(a) 2-WASHERRemove
(a) 2-BOLTRemove
(a) 2-WASHERRemove
(b) 1113W1104-3SHIMRemove / Keep2
- 1113W1026-56PHENOLIC SHIMRemove
(c) 2113W1104-3SHIMClean3
(d) 1-WING LOWER SKINClean4
(d) 1-FLAP SUPPORT
MECHANISM
Clean
FIGURE 7: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION
(SHEET 2 OF 3)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
56 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 57

More DataQtyIdentificationNameTaskStep
(e) 1-WING LOWER SKINInspect5
(e) 1-FLAP SUPPORT
MECHANISM
Inspect
(f) 1113W1104-3SHIMInspect
(a) Refer to 777 AMM 27-51-22 as an accepted procedure.
(b) Make a note of the orientation of the shim for re-installation.
(c) Clean the metal shim. Remove the phenolic shim and clean sealant from the bonded metal shim. Refer
to 777 AMM 51-31-01 as an accepted procedure.
(d) Clean the wing lower skin and flap support mechanism mating surfaces. Refer to 777 AMM 51-31-01 as
an accepted procedure.
(e) Do a detailed inspection of the wing lower skin and flap support mechanism in the contact area of the
shim for any damage. Damage is defined as any corrosion, fretting, wear, galling or deformation.
(f) Do a detailed inspection of the shim for any damage. Damage is defined as any crack.
FIGURE 7: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
57 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 58 (OCR)

REQUIREMENTS BULLETIN 777-57A0123
ALERT  ALERT
FLAP SUPPORT FITTING  WING LOWER SKIN  FLAP SUPPORT FITTING
MECHANISM ASSEMBLY NOT SHOWN FOR CLARITY
2964191
FIGURE 8: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION
(SHEET 1 OF 2)
Original Issue: July 08, 2021
Export Controlled ECCN: 9E991  777-57A0123 RB
Copyright © Unpublished
Work - See page 1 for details.  58 of 93

### Page 59

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a) 1113W1104-3SHIMInstall (Kept)1
(a)(b)1691W0019-2SHIMInstall (New)
(c)(f) 2BACB30LE8K32BOLT, 12 PT HEADInstall (New)2
Under the bolt head.
(f)
2BACW10BP8CDWASHERInstall (New)
Under the nut. (d)(f)2BACW10BP8DPWASHERInstall (New)
(e)(f) 2BACN10HY8ACSELF-LOCKING NUTInstall (New)
(a) Apply BMS 5-95, Class B or Class C, fay surface seal to all shim surfaces. Refer to SOPM 20-50-19 as
an accepted procedure.
(b) Install the new shim against the wing lower skin.
(c) Install bolts wet with BMS 5-95, Class B, sealant. Refer to SOPM 20-50-19 as an accepted procedure.
(d) The use of up to two additional BACW10BP8DP washers under the nut is permitted if the grip length is
too long. Refer to SOPM 20-50-01 as an accepted procedure.
(e) Torque to 835-865 in-lbs and re-torque to same value. Refer to SOPM 20-50-01 as an accepted procedure.
(f) This joint is fuse critical, no fastener substitution is allowed.
FIGURE 8: OUTBOARD FLAP SUPPORT NUMBER 1 - WING REAR SPAR OUTBOARD FASTENER AND
SHIM INSTALLATION
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 08, 2021
777-57A0123 RB
59 of 93
REQUIREMENTS BULLETIN 777-57A0123
ALERTALERT

### Page 60 (OCR)

REQUIREMENTS BULLETIN 777-57A0123
ALERT  ALERT
FLAP SUPPORT FITTING  WING LOWER SKIN  FLAP SUPPORT FITTING
MECHANISM ASSEMBLY NOT SHOWN FOR CLARITY
2964208
FIGURE 9: OUTBOARD FLAP SUPPORT NUMBER 2 - WING REAR SPAR INBOARD FASTENER AND
SHIM REMOVAL AND INSPECTION
(SHEET 1 OF 3)
Original Issue: July 08, 2021
Export Controlled ECCN: 9E991  777-57A0123 RB
Copyright © Unpublished
Work - See page 1 for details.  60 of 93

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