# Boeing Alert Requirements Bulletin 777-28A0097 RB: No revision named

- Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2025-2546; AD 2026-15-02 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Boeing Alert Requirements Bulletin 777-28A0097 RB](https://openairdocs.org/service-documents/boeing/777-28a0097-rb.md)
- Title as filed: 777-28A0097 RB
- Pages: 73
- PDF: https://openairdocs.org/files/sha256/eb/5f/eb5ff10b876cfa345b5f212ac99aa042fc0514df848ed4be3273680e7612744c
- Page: https://openairdocs.org/service-documents/boeing/777-28a0097-rb/file/eb5ff10b876c

## Text

Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

Commercial 
Airplanes
777
Requirements Bulletin
ALERT
Number: 777-28A0097 RB
Original Issue: August 14, 2025
ATA System: 2822
SUBJECT: FUEL - Engine Fuel Feed System - Engine Fuel Feed Tube Bonding Hardware
Inspection and Electrical Bonding Resistance Measurement
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 © 2025 The Boeing Company
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: August 14, 2025
777-28A0097 RB
1 of 73
6.0

### Page 2

Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
2 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT
BLANK PAGE

### Page 3

Table of Contents
1. EFFECTIVITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
A. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
B. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2. CONCURRENT REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. COMPLIANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. APPROVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
A. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
B. Work Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
FIGURE 1: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPERS, SADDLE CLAMPS, AND TUBE CLAMP INSPECTION AND ELECTRICAL BONDING
RESISTANCE MEASUREMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
FIGURE 2: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPER AND TUBE CLAMP REMOVAL, CLEAN AND INSTALLATION . . . . . . . . . 51
FIGURE 3: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - SADDLE
CLAMP REMOVAL AND INSTALLATION AND ELECTRICAL BONDING RESISTANCE
MEASUREMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
FIGURE 4: RIGHT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPERS, SADDLE CLAMPS AND TUBE CLAMP INSPECTION AND ELECTRICAL BONDING
RESISTANCE MEASUREMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
FIGURE 5: RIGHT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPER AND TUBE CLAMP REMOVAL, CLEAN AND INSTALLATION . . . . . . . . . 62
FIGURE 6: RIGHT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - SADDLE
CLAMP REMOVAL AND INSTALLATION AND ELECTRICAL BONDING RESISTANCE
MEASUREMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
APPENDIX B: ACCEPTABLE BONDING JUMPER INSTALLATIONS . . . . . . . . . . . . . . . . . . . 69
APPENDIX C: MAXIMUM ELECTRICAL BONDING RESISTANCES . . . . . . . . . . . . . . . . . . . . 70
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
3 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 4

Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
4 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT
BLANK PAGE

### Page 5

Commercial 
Airplanes
777
Requirements Bulletin
ALERT
Number: 777-28A0097 RB
Original Issue: August 14, 2025
ATA System: 2822
SUBJECT: FUEL - Engine Fuel Feed System - Engine Fuel Feed Tube Bonding Hardware
Inspection and Electrical Bonding Resistance Measurement
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN
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, 1689-1715, 1717-1722, 1724-1727, 1729-1736, 1738-1739, 1741-1745, 1747-1780,
1782-1784, 1786-1787, 1789-1793, 1795-1797, 1799-1800, 1802, 1804-1805, 1807, 1809-1810,
1812, 1814-1815, 1817, 1819-1820, 1822, 1824-1825, 1827, 1829-1830, 1832, 1834-1835,
1837-1838, 1840-99999 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.
NOTE: The Variable Number table below includes affected airplanes available as of the issue
date of this bulletin. Affected airplane Variable Numbers added to MyBoeingFleet.com
after the issue date of this bulletin will be shown using the Maintenance Performance
Toolbox EFFECTIVITY search function result.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
5 of 73

### Page 6

DESCRIPTIONCONFIGURATIONGROUP
All 777-200,-200LR,-300,-300ER and 777F Airplanes.-1
Airplanes equipped with GE engines.1
Airplanes equipped with Pratt and Whitney or Rolls-Royce engines.2
Airplane Models:
777-200, 777-200LR, 777-300, 777-300ER, 777F
GroupVariable Number
1WA001 - WA017
1WA076 - WA080
1WA086 - WA093
1WA101 - WA104
1WA116 - WA119
1WA131 - WA137
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
GroupVariable Number
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
1WB501 - WB512
1WB531 - WB537
1WB551 - WB554
1WB591 - WB597
1WB601 - WB606
1WB611 - WB622
1WB631 - WB638
1WB646 - WB649
GroupVariable Number
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
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
6 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 7

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
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
1WE501 - WE504
1WE511 - WE516
1WE526 - WE528
GroupVariable Number
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
1WE866 - WE868
1WE871
1WF001 - WF004
1WF016 - WF043
1WF046 - WF077
1WF081 - WF088
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
7 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 8

GroupVariable Number
1WF096 - WF101
1WF106 - WF109
1WF111 - WF124
1WF131 - WF144
1WF146 - WF147
1WF151 - WF152
1WF156 - WF173
1WF176 - WF184
1WF191
1WF201
1WF206 - WF217
1WF221 - WF229
1WF231 - WF251
GroupVariable Number
1WF256 - WF262
1WF266 - WF288
1WF296 - WF298
1WF301 - WF323
1WF326 - WF330
1WF336 - WF350
1WF356 - WF359
1WF366 - WF377
1WF381 - WF390
1WF396 - WF399
1WF401 - WF404
1WF411 - WF412
1WF416 - WF417
GroupVariable Number
1WF421
1WF426 - WF427
1WF431 - WF435
1WF441 - WF442
1WF446 - WF449
1WF456
1WF461 - WF462
1WF471 - WF472
1WF476 - WF477
1WF482 - WF483
1WF486 - WF487
1WF491 - WF492
--
B. Spares Affected
None.
2. CONCURRENT REQUIREMENTS
None.
3. COMPLIANCE
Group 1, Configuration 1:
Federal Aviation Administration (FAA) Airworthiness Directive AD 2024-19-14 is related to this bulletin. The
effective date of AD 2024-19-14 is October 17, 2024.
Group 1, Configuration 2:
The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to
Requirements Bulletin 777-28A0097 RB. The Airworthiness Directive will make the compliance tasks and
times given in Requirements Bulletin 777-28A0097 RB mandatory.
Accomplish the required actions, based on the applicable conditions in Tables 1 through 4, 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.
More than one CONDITION may apply.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
8 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 9

Group 1, Configuration 1:
Table 1: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Within 90 days after the
Original Issue date of
Requirements Bulletin
777-28A0097 RB, or
within 1 year after accom-
plishing the most recent
inspection specified in
Boeing Multi Operator
Message MOM-MOM-24-
0463-01B, dated
September 4, 2024, or
within 1 year after the
date of issuance of the
original standard certifi-
cate of airworthiness or
the original export certifi-
cate of airworthiness.
Do a Detailed Inspection (DET)
of the engine fuel feed tube to
wing structure bonding jumpers,
saddle clamps, and tube clamp
for any damage, a DET for any
loose bonding jumper lugs or
tube clamp, and a DET for any
missing bonding jumpers or
tube clamp, and do electrical
bonding resistance measure-
ment between the wing struc-
ture and engine fuel feed tube.
(a)(b)(d)
All Airplanes.
-Before further flight.CONDITION 1 (ACTION 1):
Replace any damaged and
missing bonding jumpers and
tube clamps. Re-install any un-
damaged loose bonding jumper
lugs and tube clamps. Make
sure the electrical bonding
measurement between the wing
structure and engine fuel feed
tube is less than 2.5 milliohms.
(c)
CONDITION 1: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, BUT NO DAMAGE
FOUND TO SADDLE
CLAMPS.
1 year-CONDITION 1 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
9 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 10

Group 1, Configuration 1:
Table 1: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Before further flight.Replace saddle clamp(s) and
do an electrical bonding resis-
tance measurement between
the wing structure and engine
fuel feed tube.
CONDITION 2: ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S) BUT NOT TO
BONDING JUMPERS OR
TUBE CLAMP, AND NO
LOOSE BONDING JUMPER
LUGS OR TUBE CLAMP
FOUND, AND NO MISSING
BONDING JUMPERS OR
TUBE CLAMP.
-At the times specified in
CONDITION 4.
Comply with the actions in
CONDITION 4.
CONDITION 2.1: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
MORE THAN 4.0 MIL-
LIOHMS.
-At the times specified in
CONDITION 5.
Comply with the action in CON-
DITION 5.
CONDITION 2.2: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
4.0 MILLIOHMS OR LESS.
-Before further flight.CONDITION 3 (ACTION 1):
Replace any damaged saddle
clamps, bonding jumpers and
tube clamps. Make sure the
electrical bonding measurement
between the wing structure and
engine fuel feed tube is less
than 2.5 milliohms. (c)
CONDITION 3: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, AND ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S).
1 year-CONDITION 3 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
10 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 11

Group 1, Configuration 1:
Table 1: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 4 (ACTION 1):
Remove the bonding jumpers
and related hardware, clean
bond surfaces, install bonding
jumpers and removed hardware,
and make sure the electrical
bonding measurement between
the wing structure and engine
fuel feed tube is 2.5 milliohms
or less.
CONDITION 4: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
AND NO MISSING BOND-
ING JUMPERS OR TUBE
CLAMP BUT ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS
MORE THAN 4.0 MIL-
LIOHMS.
1 year-CONDITION 4 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
1 year-Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
CONDITION 5: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
NO MISSING BONDING
JUMPERS OR TUBE
CLAMP, AND ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS 4.0
MILLIOHMS OR LESS.
(a) Bonding jumper damage is defined as one or more broken strands in the wire braid. Loose is defined
as component rotation when trying to rotate with light finger pressure.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
11 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 12

Group 1, Configuration 1:
Table 1: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
(b) Saddle clamp damage is defined as the rubber part of the clamp being split, cracked or broken or any
contact between the saddle clamps' metal components with the fuel tube. Only the visible surfaces of
the saddle clamp need to be inspected. The clamps do not need to be disassembled for this inspection.
(c) It is only necessary to replace damaged bonding jumpers, tube clamps, and saddle clamps.
(d) Tube clamp damage is defined as tube clamp being cracked, broken or screw hole elongated.
Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Within 90 days after the
Original Issue date of
Requirements Bulletin
777-28A0097 RB, or
within 1 year after accom-
plishing the most recent
inspection specified in
Boeing Multi Operator
Message MOM-MOM-24-
0463-01B, dated
September 4, 2024, or
within 1 year after the
date of issuance of the
original standard certifi-
cate of airworthiness or
the original export certifi-
cate of airworthiness.
Do a Detailed Inspection (DET)
of the engine fuel feed tube to
wing structure bonding jumpers,
saddle clamps, and tube clamp
for any damage, a DET for any
loose bonding jumper lugs or
tube clamp, and a DET for any
missing bonding jumpers or
tube clamp, and do electrical
bonding resistance measure-
ment between the wing struc-
ture and engine fuel feed tube.
(a)(b)(d)
All Airplanes.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
12 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 13

Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 6 (ACTION 1):
Replace any damaged and
missing bonding jumpers and
tube clamps. Re-install any un-
damaged loose bonding jumper
lugs and tube clamps. Make
sure the electrical bonding
measurement between the wing
structure and engine fuel feed
tube is less than 4.0 milliohms.
(c)
CONDITION 6: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, BUT NO DAMAGE
FOUND TO SADDLE
CLAMPS.
1 year-CONDITION 6 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-Before further flight.Replace saddle clamp(s) and
do an electrical bonding resis-
tance measurement between
the wing structure and engine
fuel feed tube.
CONDITION 7: ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S) BUT NOT TO
BONDING JUMPERS OR
TUBE CLAMP, AND NO
LOOSE BONDING JUMPER
LUGS OR TUBE CLAMP
FOUND, AND NO MISSING
BONDING JUMPERS OR
TUBE CLAMP.
-At the times specified in
CONDITION 9.
Comply with the actions in
CONDITION 9.
CONDITION 7.1: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
MORE THAN 4.0 MIL-
LIOHMS.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
13 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 14

Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-At the times specified in
CONDITION 10.
Comply with the action in CON-
DITION 10.
CONDITION 7.2: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
4.0 MILLIOHMS OR LESS.
-Before further flight.CONDITION 8 (ACTION 1):
Replace any damaged saddle
clamps, bonding jumpers and
tube clamps. Make sure the
electrical bonding measurement
between the wing structure and
engine fuel feed tube is less
than 4.0 milliohms. (c)
CONDITION 8: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, AND ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S).
1 year-CONDITION 8 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
14 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 15

Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 9 (ACTION 1):
Remove the bonding jumpers
and related hardware, clean
bond surfaces, install bonding
jumpers and removed hardware,
and make sure the electrical
bonding measurement between
the wing structure and engine
fuel feed tube is 4.0 milliohms
or less.
CONDITION 9: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
AND NO MISSING BOND-
ING JUMPERS OR TUBE
CLAMP BUT ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS
MORE THAN 4.0 MIL-
LIOHMS.
1 year-CONDITION 9 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
1 year-Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
CONDITION 10: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
NO MISSING BONDING
JUMPERS OR TUBE
CLAMP, AND ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS 4.0
MILLIOHMS OR LESS.
(a) Bonding jumper damage is defined as one or more broken strands in the wire braid. Loose is defined
as component rotation when trying to rotate with light finger pressure.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
15 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 16

Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
(b) Saddle clamp damage is defined as the rubber part of the clamp being split, cracked or broken or any
contact between the saddle clamps' metal components with the fuel tube. Only the visible surfaces of
the saddle clamp need to be inspected. The clamps do not need to be disassembled for this inspection.
(c) It is only necessary to replace damaged bonding jumpers, tube clamps, and saddle clamps.
(d) Tube clamp damage is defined as tube clamp being cracked, broken or screw hole elongated.
Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Within 1 year after the
Original Issue date of
Requirements Bulletin
777-28A0097 RB or
within 1 year after the
date of issuance of the
original standard certifi-
cate of airworthiness or
the original export certifi-
cate of airworthiness.
Do a Detailed Inspection (DET)
of the engine fuel feed tube to
wing structure bonding jumpers,
saddle clamps, and tube clamp
for any damage, a DET for any
loose bonding jumper lugs or
tube clamp, and a DET for any
missing bonding jumpers or
tube clamp, and do electrical
bonding resistance measure-
ment between the wing struc-
ture and engine fuel feed tube.
(a)(b)(d)
All Airplanes.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
16 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 17

Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 11 (ACTION 1):
Replace any damaged and
missing bonding jumpers and
tube clamps. Re-install any un-
damaged loose bonding jumper
lugs and tube clamps. Make
sure the electrical bonding
measurement between the wing
structure and engine fuel feed
tube is less than 2.5 milliohms.
(c)
CONDITION 11: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, BUT NO DAMAGE
FOUND TO SADDLE
CLAMPS.
1 year-CONDITION 11 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-Before further flight.Replace saddle clamp(s) and
do an electrical bonding resis-
tance measurement between
the wing structure and engine
fuel feed tube.
CONDITION 12: ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S) BUT NOT TO
BONDING JUMPERS OR
TUBE CLAMP, AND NO
LOOSE BONDING JUMPER
LUGS OR TUBE CLAMP
FOUND, AND NO MISSING
BONDING JUMPERS OR
TUBE CLAMP.
-At the times specified in
CONDITION 14.
Comply with the actions in
CONDITION 14.
CONDITION 12.1: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
MORE THAN 4.0 MIL-
LIOHMS.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
17 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 18

Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-At the times specified in
CONDITION 15.
Comply with the action in CON-
DITION 15.
CONDITION 12.2: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
4.0 MILLIOHMS OR LESS.
-Before further flight.CONDITION 13 (ACTION 1):
Replace any damaged saddle
clamps, bonding jumpers and
tube clamps. Make sure the
electrical bonding measurement
between the wing structure and
engine fuel feed tube is less
than 2.5 milliohms. (c)
CONDITION 13: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, AND ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S).
1 year-CONDITION 13 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
18 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 19

Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 14 (ACTION 1):
Remove the bonding jumpers
and related hardware, clean
bond surfaces, install bonding
jumpers and removed hardware,
and make sure the electrical
bonding measurement between
the wing structure and engine
fuel feed tube is 2.5 milliohms
or less.
CONDITION 14: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
AND NO MISSING BOND-
ING JUMPERS OR TUBE
CLAMP BUT ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS
MORE THAN 4.0 MIL-
LIOHMS.
1 year-CONDITION 14 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
1 year-Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
CONDITION 15: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
NO MISSING BONDING
JUMPERS OR TUBE
CLAMP, AND ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS 4.0
MILLIOHMS OR LESS.
(a) Bonding jumper damage is defined as one or more broken strands in the wire braid. Loose is defined
as component rotation when trying to rotate with light finger pressure.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
19 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 20

Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
(b) Saddle clamp damage is defined as the rubber part of the clamp being split, cracked or broken or any
contact between the saddle clamps' metal components with the fuel tube. Only the visible surfaces of
the saddle clamp need to be inspected. The clamps do not need to be disassembled for this inspection.
(c) It is only necessary to replace damaged bonding jumpers, tube clamps, and saddle clamps.
(d) Tube clamp damage is defined as tube clamp being cracked, broken or screw hole elongated.
Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Within 1 year after the
Original Issue date of
Requirements Bulletin
777-28A0097 RB or
within 1 year after the
date of issuance of the
original standard certifi-
cate of airworthiness or
the original export certifi-
cate of airworthiness.
Do a Detailed Inspection (DET)
of the engine fuel feed tube to
wing structure bonding jumpers,
saddle clamps, and tube clamp
for any damage, a DET for any
loose bonding jumper lugs or
tube clamp, and a DET for any
missing bonding jumpers or
tube clamp, and do electrical
bonding resistance measure-
ment between the wing struc-
ture and engine fuel feed tube.
(a)(b)(d)
All Airplanes.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
20 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 21

Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 16 (ACTION 1):
Replace any damaged and
missing bonding jumpers and
tube clamps. Re-install any un-
damaged loose bonding jumper
lugs and tube clamps. Make
sure the electrical bonding
measurement between the wing
structure and engine fuel feed
tube is less than 4.0 milliohms.
(c)
CONDITION 16: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, BUT NO DAMAGE
FOUND TO SADDLE
CLAMPS.
1 year-CONDITION 16 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-Before further flight.Replace saddle clamp(s) and
do an electrical bonding resis-
tance measurement between
the wing structure and engine
fuel feed tube.
CONDITION 17: ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S) BUT NOT TO
BONDING JUMPERS OR
TUBE CLAMP, AND NO
LOOSE BONDING JUMPER
LUGS OR TUBE CLAMP
FOUND, AND NO MISSING
BONDING JUMPERS OR
TUBE CLAMP.
-At the times specified in
CONDITION 19.
Comply with the actions in
CONDITION 19.
CONDITION 17.1: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
MORE THAN 4.0 MIL-
LIOHMS.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
21 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 22

Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-At the times specified in
CONDITION 20.
Comply with the action in CON-
DITION 20.
CONDITION 17.2: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
4.0 MILLIOHMS OR LESS.
-Before further flight.CONDITION 18 (ACTION 1):
Replace any damaged saddle
clamps, bonding jumpers and
tube clamps. Make sure the
electrical bonding measurement
between the wing structure and
engine fuel feed tube is less
than 4.0 milliohms. (c)
CONDITION 18: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, AND ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S).
1 year-CONDITION 18 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
22 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 23

Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 19 (ACTION 1):
Remove the bonding jumpers
and related hardware, clean
bond surfaces, install bonding
jumpers and removed hardware,
and make sure the electrical
bonding measurement between
the wing structure and engine
fuel feed tube is less than 4.0
milliohms or less.
CONDITION 19: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
AND NO MISSING BOND-
ING JUMPERS OR TUBE
CLAMP BUT ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS
MORE THAN 4.0 MIL-
LIOHMS.
1 year-CONDITION 19 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
1 year-Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
CONDITION 20: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
NO MISSING BONDING
JUMPERS OR TUBE
CLAMP, AND ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS 4.0
MILLIOHMS OR LESS.
(a) Bonding jumper damage is defined as one or more broken strands in the wire braid. Loose is defined
as component rotation when trying to rotate with light finger pressure.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
23 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 24

Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
(Whichever Occurs
Later)
ActionCondition
(b) Saddle clamp damage is defined as the rubber part of the clamp being split, cracked or broken or any
contact between the saddle clamps' metal components with the fuel tube. Only the visible surfaces of
the saddle clamp need to be inspected. The clamps do not need to be disassembled for this inspection.
(c) It is only necessary to replace damaged bonding jumpers, tube clamps, and saddle clamps.
(d) Tube clamp damage is defined as tube clamp being cracked, broken or screw hole elongated.
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) approved for all EASA 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.
The Manager of the FAA Continued Operational Safety Branch approves the accomplishment of the
inspections defined in this bulletin as an alternative method of compliance to the accomplishment of the
required inspections of paragraph (g) and (h) of AD 2024-19-14. All provisions of AD 2024-19-14 that are
not specifically referenced in the above statement remain fully applicable and must be complied with
accordingly.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
24 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 25

5.    ACCOMPLISHMENT INSTRUCTIONS
A. GENERAL INFORMATION
OBEY THE MANUFACTURER'S PROCEDURES WHEN YOU DO TASKS THAT
ARE RELATED TO AIRWORTHINESS LIMITATIONS (AWL). IF YOU DO NOT
OBEY THE PROCEDURES, IT CAN INCREASE THE RISK OF A SOURCE OF
IGNITION. INJURIES TO PERSONNEL, AND DAMAGE TO EQUIPMENT CAN
OCCUR IF THERE IS A FIRE OR EXPLOSION.
WARNING
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. In the RB, the "Refer to the listed procedures..." column of the
table(s) in the Work Instructions is for reference only. The procedures in that column
are not required by the AD and are for guidance only. 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. Unless shown differently, these dimensions and tolerances are used:
– Linear dimensions are in inches
– Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus
or minus 0.03 inch
– Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch
– Angular tolerance is plus or minus 2 degrees
– Hole dimensions for standard solid rivets and fasteners are in Structural Repair
Manual (SRM) Chapter 51
– Torque Values:
— Values for structural fasteners are given in 777 Structural Repair Manual,
Chapter 51.
— Values for airframe maintenance tasks are included in Chapter 20 of 777
Aircraft Maintenance Manual (AMM).
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
25 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 26

— Values for electrical maintenance tasks are included in Chapter 20 of
Standard Wiring Practices Manual (SWPM).
— Values for engine maintenance tasks are included in Chapter 70 of 777
Aircraft Maintenance Manual (AMM).
— Non-standard torque values for maintenance tasks are included in the
applicable installation step.
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. A Detailed Inspection (DET) 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.
9. The instructions in Work Instructions and the figures can include operation of tools
or test equipment. Boeing Engineering Tool Drawings, the Illustrated Tool and
Equipment Manual, and the Special Tool and Ground Handling Drawing Index contain
data on versions of the tools or test equipment that you can use. It is permitted to
use replaced tools. It is not permitted to use superseded tools.
10. If the length of any fastener specified in this service bulletin does not meet installation
standards given in SRM Chapter 51, then a fastener of the same specification, with
a length which meets the installation standards given in SRM Chapter 51 may be
used. In addition, washers may be installed for fastener grip length. Refer to SRM
Chapter 51. Refer to SOPM 20-50-01 for alternate full threaded fasteners (screws)
needed for installation in this service bulletin.
11. Use of colors in Figures is based on guidance from the ATA e-Business Program
(ATA) iSpec 2200.
B. WORK INSTRUCTIONS
Actions Required for Compliance
1. Requirements.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
26 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 27

Group 1, Configuration 1:
Table 1: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 1: OPEN
ACCESS.
-Do a Detailed Inspection (DET)
of the engine fuel feed tube to
wing structure bonding jumpers,
saddle clamps, and tube clamp
for any damage, a DET for any
loose bonding jumper lugs or
tube clamp, and a DET for any
missing bonding jumpers or
tube clamp, and do electrical
bonding resistance measure-
ment between the wing struc-
ture and engine fuel feed tube.
(a)(b)(d)
All Airplanes.
-FIGURE 1
-FIGURE 2CONDITION 1 (ACTION 1):
Replace any damaged and
missing bonding jumpers and
tube clamps. Re-install any un-
damaged loose bonding jumper
lugs and tube clamps. Make
sure the electrical bonding
measurement between the wing
structure and engine fuel feed
tube is less than 2.5 milliohms.
(c)
CONDITION 1: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, BUT NO DAMAGE
FOUND TO SADDLE
CLAMPS.
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 1 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 1
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
27 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 28

Group 1, Configuration 1:
Table 1: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 3Replace saddle clamp(s) and
do an electrical bonding resis-
tance measurement between
the wing structure and engine
fuel feed tube.
CONDITION 2: ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S) BUT NOT TO
BONDING JUMPERS OR
TUBE CLAMP, AND NO
LOOSE BONDING JUMPER
LUGS OR TUBE CLAMP
FOUND, AND NO MISSING
BONDING JUMPERS OR
TUBE CLAMP.
-See CONDITION 4.Comply with the actions in
CONDITION 4.
CONDITION 2.1: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
MORE THAN 4.0 MIL-
LIOHMS.
-See CONDITION 5.Comply with the action in CON-
DITION 5.
CONDITION 2.2: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
4.0 MILLIOHMS OR LESS.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
28 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 29

Group 1, Configuration 1:
Table 1: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 2 and FIGURE
3
CONDITION 3 (ACTION 1):
Replace any damaged saddle
clamps, bonding jumpers and
tube clamps. Make sure the
electrical bonding measurement
between the wing structure and
engine fuel feed tube is less
than 2.5 milliohms. (c)
CONDITION 3: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, AND ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S).
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 3 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 1
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
29 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 30

Group 1, Configuration 1:
Table 1: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 2CONDITION 4 (ACTION 1):
Remove the bonding jumpers
and related hardware, clean
bond surfaces, install bonding
jumpers and removed hardware,
and make sure the electrical
bonding measurement between
the wing structure and engine
fuel feed tube is 2.5 milliohms
or less.
CONDITION 4: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
AND NO MISSING BOND-
ING JUMPERS OR TUBE
CLAMP BUT ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS
MORE THAN 4.0 MIL-
LIOHMS.
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 4 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 1
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
30 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 31

Group 1, Configuration 1:
Table 1: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 2:
CLOSE ACCESS.
--CONDITION 5: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
NO MISSING BONDING
JUMPERS OR TUBE
CLAMP, AND ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS 4.0
MILLIOHMS OR LESS.
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 1
(a) Bonding jumper damage is defined as one or more broken strands in the wire braid. Loose is defined
as component rotation when trying to rotate with light finger pressure.
(b) Saddle clamp damage is defined as the rubber part of the clamp being split, cracked or broken or any
contact between the saddle clamps' metal components with the fuel tube. Only the visible surfaces of
the saddle clamp need to be inspected. The clamps do not need to be disassembled for this inspection.
(c) It is only necessary to replace damaged bonding jumpers, tube clamps, and saddle clamps.
(d) Tube clamp damage is defined as tube clamp being cracked, broken or screw hole elongated.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
31 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 32

Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 1: OPEN
ACCESS.
-Do a Detailed Inspection (DET)
of the engine fuel feed tube to
wing structure bonding jumpers,
saddle clamps, and tube clamp
for any damage, a DET for any
loose bonding jumper lugs or
tube clamp, and a DET for any
missing bonding jumpers or
tube clamp, and do electrical
bonding resistance measure-
ment between the wing struc-
ture and engine fuel feed tube.
(a)(b)(d)
All Airplanes.
-FIGURE 4
-FIGURE 5CONDITION 6 (ACTION 1):
Replace any damaged and
missing bonding jumpers and
tube clamps. Re-install any un-
damaged loose bonding jumper
lugs and tube clamps. Make
sure the electrical bonding
measurement between the wing
structure and engine fuel feed
tube is less than 4.0 milliohms.
(c)
CONDITION 6: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, BUT NO DAMAGE
FOUND TO SADDLE
CLAMPS.
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 6 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 4
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
32 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 33

Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 6Replace saddle clamp(s) and
do an electrical bonding resis-
tance measurement between
the wing structure and engine
fuel feed tube.
CONDITION 7: ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S) BUT NOT TO
BONDING JUMPERS OR
TUBE CLAMP, AND NO
LOOSE BONDING JUMPER
LUGS OR TUBE CLAMP
FOUND, AND NO MISSING
BONDING JUMPERS OR
TUBE CLAMP.
-See CONDITION 9.Comply with the actions in
CONDITION 9.
CONDITION 7.1: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
MORE THAN 4.0 MIL-
LIOHMS.
-See CONDITION 10.Comply with the action in CON-
DITION 10.
CONDITION 7.2: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
4.0 MILLIOHMS OR LESS.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
33 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 34

Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 5 and FIGURE
6
CONDITION 8 (ACTION 1):
Replace any damaged saddle
clamps, bonding jumpers and
tube clamps. Make sure the
electrical bonding measurement
between the wing structure and
engine fuel feed tube is less
than 4.0 milliohms. (c)
CONDITION 8: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, AND ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S).
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 8 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 4
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
34 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 35

Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 5CONDITION 9 (ACTION 1):
Remove the bonding jumpers
and related hardware, clean
bond surfaces, install bonding
jumpers and removed hardware,
and make sure the electrical
bonding measurement between
the wing structure and engine
fuel feed tube is 4.0 milliohms
or less.
CONDITION 9: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
AND NO MISSING BOND-
ING JUMPERS OR TUBE
CLAMP BUT ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS
MORE THAN 4.0 MIL-
LIOHMS.
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 9 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 4
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
35 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 36

Group 1, Configuration 1:
Table 2: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 2:
CLOSE ACCESS.
--CONDITION 10: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
NO MISSING BONDING
JUMPERS OR TUBE
CLAMP, AND ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS 4.0
MILLIOHMS OR LESS.
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 4
(a) Bonding jumper damage is defined as one or more broken strands in the wire braid. Loose is defined
as component rotation when trying to rotate with light finger pressure.
(b) Saddle clamp damage is defined as the rubber part of the clamp being split, cracked or broken or any
contact between the saddle clamps' metal components with the fuel tube. Only the visible surfaces of
the saddle clamp need to be inspected. The clamps do not need to be disassembled for this inspection.
(c) It is only necessary to replace damaged bonding jumpers, tube clamps, and saddle clamps.
(d) Tube clamp damage is defined as tube clamp being cracked, broken or screw hole elongated.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
36 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 37

Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 1: OPEN
ACCESS.
-Do a Detailed Inspection (DET)
of the engine fuel feed tube to
wing structure bonding jumpers,
saddle clamps, and tube clamp
for any damage, a DET for any
loose bonding jumper lugs or
tube clamp, and a DET for any
missing bonding jumpers or
tube clamp, and do electrical
bonding resistance measure-
ment between the wing struc-
ture and engine fuel feed tube.
(a)(b)(d)
All Airplanes.
-FIGURE 1
-FIGURE 2CONDITION 11 (ACTION 1):
Replace any damaged and
missing bonding jumpers and
tube clamps. Re-install any un-
damaged loose bonding jumper
lugs and tube clamps. Make
sure the electrical bonding
measurement between the wing
structure and engine fuel feed
tube is less than 2.5 milliohms.
(c)
CONDITION 11: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, BUT NO DAMAGE
FOUND TO SADDLE
CLAMPS.
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 11 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 1
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
37 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 38

Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 3Replace saddle clamp(s) and
do an electrical bonding resis-
tance measurement between
the wing structure and engine
fuel feed tube.
CONDITION 12: ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S) BUT NOT TO
BONDING JUMPERS OR
TUBE CLAMP, AND NO
LOOSE BONDING JUMPER
LUGS OR TUBE CLAMP
FOUND, AND NO MISSING
BONDING JUMPERS OR
TUBE CLAMP.
-See CONDITION 14.Comply with the actions in
CONDITION 14.
CONDITION 12.1: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
MORE THAN 4.0 MIL-
LIOHMS.
-See CONDITION 15.Comply with the action in CON-
DITION 15.
CONDITION 12.2: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
4.0 MILLIOHMS OR LESS.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
38 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 39

Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 2 and FIGURE
3
CONDITION 13 (ACTION 1):
Replace any damaged saddle
clamps, bonding jumpers and
tube clamps. Make sure the
electrical bonding measurement
between the wing structure and
engine fuel feed tube is less
than 2.5 milliohms. (c)
CONDITION 13: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, AND ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S).
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 13 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 1
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
39 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 40

Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 2CONDITION 14 (ACTION 1):
Remove the bonding jumpers
and related hardware, clean
bond surfaces, install bonding
jumpers and removed hardware,
and make sure the electrical
bonding measurement between
the wing structure and engine
fuel feed tube is 2.5 milliohms
or less.
CONDITION 14: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
AND NO MISSING BOND-
ING JUMPERS OR TUBE
CLAMP BUT ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS
MORE THAN 4.0 MIL-
LIOHMS.
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 14 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 1
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
40 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 41

Group 1, Configuration 2:
Table 3: Left Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers, Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 2:
CLOSE ACCESS.
--CONDITION 15: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
NO MISSING BONDING
JUMPERS OR TUBE
CLAMP, AND ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS 4.0
MILLIOHMS OR LESS.
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 1
(a) Bonding jumper damage is defined as one or more broken strands in the wire braid. Loose is defined
as component rotation when trying to rotate with light finger pressure.
(b) Saddle clamp damage is defined as the rubber part of the clamp being split, cracked or broken or any
contact between the saddle clamps' metal components with the fuel tube. Only the visible surfaces of
the saddle clamp need to be inspected. The clamps do not need to be disassembled for this inspection.
(c) It is only necessary to replace damaged bonding jumpers, tube clamps, and saddle clamps.
(d) Tube clamp damage is defined as tube clamp being cracked, broken or screw hole elongated.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
41 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 42

Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 1: OPEN
ACCESS.
-Do a Detailed Inspection (DET)
of the engine fuel feed tube to
wing structure bonding jumpers,
saddle clamps, and tube clamp
for any damage, a DET for any
loose bonding jumper lugs or
tube clamp, and a DET for any
missing bonding jumpers or
tube clamp, and do electrical
bonding resistance measure-
ment between the wing struc-
ture and engine fuel feed tube.
(a)(b)(d)
All Airplanes.
-FIGURE 4
-FIGURE 5CONDITION 16 (ACTION 1):
Replace any damaged and
missing bonding jumpers and
tube clamps. Re-install any un-
damaged loose bonding jumper
lugs and tube clamps. Make
sure the electrical bonding
measurement between the wing
structure and engine fuel feed
tube is less than 4.0 milliohms.
(c)
CONDITION 16: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, BUT NO DAMAGE
FOUND TO SADDLE
CLAMPS.
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 16 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 4
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
42 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 43

Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 6Replace saddle clamp(s) and
do an electrical bonding resis-
tance measurement between
the wing structure and engine
fuel feed tube.
CONDITION 17: ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S) BUT NOT TO
BONDING JUMPERS OR
TUBE CLAMP, AND NO
LOOSE BONDING JUMPER
LUGS OR TUBE CLAMP
FOUND, AND NO MISSING
BONDING JUMPERS OR
TUBE CLAMP.
-See CONDITION 19.Comply with the actions in
CONDITION 19.
CONDITION 17.1: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
MORE THAN 4.0 MIL-
LIOHMS.
-See CONDITION 20.Comply with the action in CON-
DITION 20.
CONDITION 17.2: ELECTRI-
CAL BONDING RESIS-
TANCE MEASUREMENT IS
4.0 MILLIOHMS OR LESS.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
43 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 44

Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 5 and FIGURE
6
CONDITION 18 (ACTION 1):
Replace any damaged saddle
clamps, bonding jumpers and
tube clamps. Make sure the
electrical bonding measurement
between the wing structure and
engine fuel feed tube is less
than 4.0 milliohms. (c)
CONDITION 18: ANY DAM-
AGE FOUND TO BONDING
JUMPER(S) OR TUBE
CLAMP, OR ANY LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
OR ANY MISSING BOND-
ING JUMPER OR TUBE
CLAMP, AND ANY DAM-
AGE FOUND TO SADDLE
CLAMP(S).
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 18 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 4
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
44 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 45

Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
-FIGURE 5CONDITION 19 (ACTION 1):
Remove the bonding jumpers
and related hardware, clean
bond surfaces, install bonding
jumpers and removed hardware,
and make sure the electrical
bonding measurement between
the wing structure and engine
fuel feed tube is 4.0 milliohms
or less.
CONDITION 19: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
AND NO MISSING BOND-
ING JUMPERS OR TUBE
CLAMP BUT ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS
MORE THAN 4.0 MIL-
LIOHMS.
Do PART 2:
CLOSE ACCESS.
-
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-CONDITION 19 (ACTION 2):
Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 4
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
45 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 46

Group 1, Configuration 2:
Table 4: Right Wing Engine Fuel Feed Tube to Wing Structure Bonding Jumpers. Saddle Clamps, Tube
Clamp Inspection and Electrical Bonding Resistance Measurement
Refer to the listed
procedures in SB
777-28A0097
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 2:
CLOSE ACCESS.
--CONDITION 20: NO DAM-
AGE FOUND TO BONDING
JUMPERS OR TUBE
CLAMP OR SADDLE
CLAMPS, NO LOOSE
BONDING JUMPER LUGS
OR TUBE CLAMP FOUND,
NO MISSING BONDING
JUMPERS OR TUBE
CLAMP, AND ELECTRICAL
BONDING RESISTANCE
MEASUREMENT BE-
TWEEN THE WING
STRUCTURE AND ENGINE
FUEL FEED TUBE IS 4.0
MILLIOHMS OR LESS.
Do PART 3: RE-
PORT INSPEC-
TION RESULTS.
-
Do PART 1: OPEN
ACCESS.
-Repeat DET of the engine fuel
feed tube to wing structure
bonding jumpers, saddle
clamps, and tube clamp for any
damage, a DET for any loose
bonding jumper lugs or tube
clamp, and a DET for any miss-
ing bonding jumpers or tube
clamp, and do electrical bonding
resistance measurement be-
tween the wing structure and
engine fuel feed tube. (a)(b)(d)
-FIGURE 4
(a) Bonding jumper damage is defined as one or more broken strands in the wire braid. Loose is defined
as component rotation when trying to rotate with light finger pressure.
(b) Saddle clamp damage is defined as the rubber part of the clamp being split, cracked or broken or any
contact between the saddle clamps' metal components with the fuel tube. Only the visible surfaces of
the saddle clamp need to be inspected. The clamps do not need to be disassembled for this inspection.
(c) It is only necessary to replace damaged bonding jumpers, tube clamps, and saddle clamps.
(d) Tube clamp damage is defined as tube clamp being cracked, broken or screw hole elongated.
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
46 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 47 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
LEFT MAIN
TANK
3072348
FIGURE 1: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPERS, SADDLE CLAMPS, AND TUBE CLAMP INSPECTION AND ELECTRICAL BONDING RESISTANCE
MEASUREMENT
(SHEET 1 OF 4)
Original Issue: August 14, 2025
Export Controlled ECCN: 9E991  777-28A0097 RB
See page 1 for details  47 of 73

### Page 48 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
ATTACHMENT
FASTENERS
WING
STRUCTURE
WING STRUCTURE
ENGINE FUEL  BRACKET
FEED TUBE
TUBE CLAMP
DETAILED INSPECTION  3072349
FIGURE 1: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPERS, SADDLE CLAMPS, AND TUBE CLAMP INSPECTION AND ELECTRICAL BONDING RESISTANCE
MEASUREMENT
(SHEET 2 OF 4)
Original Issue: August 14, 2025
777-28A0097 RB
Export Controlled ECCN: 9E991
See page 1 for details  48 of 73

### Page 49 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
DETAILED INSPECTION  3075840
FIGURE 1: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPERS, SADDLE CLAMPS, AND TUBE CLAMP INSPECTION AND ELECTRICAL BONDING RESISTANCE
MEASUREMENT
(SHEET 3 OF 4)
Original Issue: August 14, 2025
Export Controlled ECCN: 9E991  777-28A0097 RB
See page 1 for details  49 of 73

### Page 50

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)2-SADDLE CLAMPInspect1
(b)(c)(d)2-BONDING JUMPERInspect2
(e)(f)(h)1-TUBE CLAMPInspect3
(g)1-ELECTRICAL BOND-
ING RESISTANCE
Measure4
(a) Do a detailed inspection of the engine fuel feed tube saddle clamps for any damage. Saddle clamp
damage is defined as the rubber part of the clamp being split, cracked or broken or any contact between
the saddle clamps' metal components with the fuel tube. Inspect only the visible surfaces of the saddle
clamp. The clamps do not need to be disassembled for this inspection.
(b) Do a detailed inspection for any missing bonding jumpers.
(c) Do a detailed inspection of the bonding jumper lugs for a loose condition. Loose is defined as component
rotation when trying to rotate with light finger pressure.
(d) Do a detailed inspection of the engine fuel feed tube to wing structure bonding jumpers for any damage.
Bonding jumper damage is defined as one or more broken strands in the wire braid.
(e) Do a detailed inspection for any missing tube clamp.
(f) Do a detailed inspection of the tube clamp for a loose condition. Loose is defined as component rotation
when trying to rotate with light finger pressure.
(g) Use a M1 or M1B bonding meter to measure the electrical bonding resistance between the wing structure
and the engine fuel feed tube. An acceptable resistance is 4.0 milliohms or less. Refer to SWPM 20-20-
00 as an accepted procedure.
(h) Do a detailed inspection of the tube clamp for damage. Tube clamp damage is defined as tube clamp
being cracked, broken or screw hole elongated.
FIGURE 1: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPERS, SADDLE CLAMPS, AND TUBE CLAMP INSPECTION AND ELECTRICAL BONDING RESISTANCE
MEASUREMENT
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
50 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 51 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
LEFT MAIN
TANK
3072350
FIGURE 2: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPER AND TUBE CLAMP REMOVAL, CLEAN AND INSTALLATION
(SHEET 1 OF 4)
Original Issue: August 14, 2025
Export Controlled ECCN: 9E991  777-28A0097 RB
See page 1 for details  51 of 73

### Page 52 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
WING
STRUCTURE
3072361
FIGURE 2: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPER AND TUBE CLAMP REMOVAL, CLEAN AND INSTALLATION
(SHEET 2 OF 4)
Original Issue: August 14, 2025
777-28A0097 RB
Export Controlled ECCN: 9E991
See page 1 for details  52 of 73

### Page 53

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
-1-NUTRemove1
-1NAS1149C0332RWASHERRemove / Keep
-1-NUTRemove2
-2NAS1149D0332H OR
NAS1149D0332J
WASHERRemove / Keep
-1NAS1801-3-8,
BACS12HN3-8, OR
BACS12GU3K8
SCREWRemove / Keep
(a)2BACJ40AC44-3BONDING JUMPERRemove3
(b)1AN735DC32TUBE CLAMPRemove4
(c)--GROUND STUD
THREADS AND NUT
Clean5
(c)(d)1AN735DC32TUBE CLAMPClean
(c)(d)(l)--ENGINE FUEL FEED
TUBE
Clean
(c)(m)2BACJ40AC44-3BONDING JUMPERClean
(c)1NAS1149C0332RWASHERClean
(c)(o)2NAS1149D0332H OR
NAS1149D0332J
WASHERClean
(c)(o)1NAS1801-3-8,
BACS12HN3-8, OR
BACS12GU3K8
SCREWClean
(e)(k)1AN735DC32TUBE CLAMPInstall (New)6
(f)(g)(h)(k)2BACJ40AC44-3BONDING JUMPERInstall (New)7
(k)(o)1NAS1801-3-8,
BACS12HN3-8, OR
BACS12GU3K8
SCREWInstall (Kept)8
(k)(o)2NAS1149D0332H OR
NAS1149D0332J
WASHERInstall (Kept)
(k)(o)1BACN10YR3CD OR
BACN10JC3CD
NUTInstall (New)
(k)1NAS1149C0332RWASHERInstall (Kept)9
(k)(o)1BACN10YR3CM OR
BACN10JC3CM
NUTInstall (New)
FIGURE 2: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPER AND TUBE CLAMP REMOVAL, CLEAN AND INSTALLATION
(SHEET 3 OF 4)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
53 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 54

More DataQtyIdentificationNameTaskStep
(i)(j)--ELECTRICAL BOND-
ING RESISTANCE
Measure10
(n)-BMS5-45, CLASS BSEALANTInstall (New)11
(a) It is only necessary to discard damaged bonding jumper(s).
(b) It is only necessary to discard a damaged tube clamp.
(c) Solvent clean all bond surfaces. Refer to APPENDIX A as an accepted procedure.
(d) If a fillet seal is found installed, use non-metallic tools to remove the fillet seal from the tube clamp and
engine fuel feed tube interface. Refer to SOPM 20-50-19 as an accepted procedure.
(e) Install a new or serviceable tube clamp. A tube clamp that has no damage is a serviceable tube clamp.
(f) Install the bonding jumper with the red terminal attached to the tube clamp.
(g) Install new or serviceable bonding jumpers. A bonding jumper that has no damage is a serviceable
bonding jumper.
(h) In accordance with APPENDIX B for acceptable bonding jumper installations.
(i) Use a M1 or M1B bonding meter to measure the electrical bonding resistance between the wing structure
and the engine fuel feed tube. Make sure the bonding resistance is 2.5 milliohms or less. Refer to SWPM
20-20-00 as an accepted procedure.
(j) If the resistance measurement is more than the maximum resistance given, disassemble parts, clean
faying surfaces, install parts and measure bonding resistance again.
(k) Install one end of the bonding jumper to the ground stud. Refer to SWPM 20-20-10 as an accepted pro-
cedure. Measure the resistance between the bonding jumper and structure and make sure the maximum
resistance is within limits in accordance with APPENDIX C. Install the other end of the bonding jumper
to the tube clamp. Refer to SWPM 20-20-00 as an accepted procedure. Measure the resistance between
the bonding jumper and fuel tube and ensure the maximum resistance is within limits in accordance with
APPENDIX C. Installation of each end of the bonding jumper requires an electrical bond check in accor-
dance with APPENDIX C.
(l) Make sure tube surface that will contact the clamp is cleaned.
(m) Each bonding jumper has two terminals. Each terminal has two bonding surfaces. Make sure all of the
bonding surfaces on the two bonding jumpers are cleaned.
(n) If a fillet seal was removed from the tube and clamp, apply a new fillet seal. Only the clamp is fillet sealed
to the tube. Do not apply sealant to the clamp hardware (jumper, screw, washers, nut). Fillet seal common
to the tube and clamp including exposed areas of the tube between the clamp tabs. Refer to SWPM 20-
20-00 (see paragraph 8) as an accepted procedure given the requirements above. If a fillet seal was not
removed from the tube and clamp, do not apply a fillet seal.
(o) These parts are not interchangeable.
FIGURE 2: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPER AND TUBE CLAMP REMOVAL, CLEAN AND INSTALLATION
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
54 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 55 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
LEFT MAIN
TANK
3075843
FIGURE 3: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - SADDLE CLAMP
REMOVAL AND INSTALLATION AND ELECTRICAL BONDING RESISTANCE MEASUREMENT
(SHEET 1 OF 3)
Original Issue: August 14, 2025
Export Controlled ECCN: 9E991  777-28A0097 RB
See page 1 for details  55 of 73

### Page 56 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
WING
STRUCTURE
TYPICAL
B
3075845
FIGURE 3: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - SADDLE CLAMP
REMOVAL AND INSTALLATION AND ELECTRICAL BONDING RESISTANCE MEASUREMENT
(SHEET 2 OF 3)
Original Issue: August 14, 2025
777-28A0097 RB
Export Controlled ECCN: 9E991
See page 1 for details  56 of 73

### Page 57

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)4BACB30NM3K4 OR
BACS12GU3K8
FASTENERRemove / Keep1
(a)4NAS1149E0332PWASHERRemove / Keep
(a)2BACC10GF32C OR
BACC10GF32CH
SADDLE CLAMPRemove2
(a)(b)(c)2BACC10GF32C OR
BACC10GF32CH
SADDLE CLAMPInstall (New)3
(a)4NAS1149E0332PWASHERInstall (Kept)4
Refer to 777 AMM
20-11-00 as an ac-
cepted procedure.
4BACB30NM3K4 OR
BACS12GU3K8
FASTENERInstall (Kept)
(a)(d)
(e)1-ELECTRICAL BOND-
ING RESISTANCE
Measure5
(a) Both saddle clamp locations are shown, it is only necessary to replace a damaged saddle clamp(s).
(b) Make sure the engine fuel feed tube is free of any dirt or debris in the area of the clamp before installation
of the new saddle clamp. Refer to SOPM 20-30-03 as an accepted procedure.
(c) BACC10GF32C is an acceptable substitution for BACC10GF32CH.
(d) These parts are not interchangeable.
(e) Use a M1 or M1B bonding meter to measure the electrical bonding resistance between the wing structure
and the engine fuel feed tube. An acceptable resistance is 4.0 milliohms or less. Refer to SWPM 20-20-
00 as an accepted procedure.
FIGURE 3: LEFT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - SADDLE CLAMP
REMOVAL AND INSTALLATION AND ELECTRICAL BONDING RESISTANCE MEASUREMENT
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: August 14, 2025
777-28A0097 RB
57 of 73
REQUIREMENTS BULLETIN 777-28A0097
ALERTALERT

### Page 58 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
RIGHT MAIN
TANK
FWD  3072423
FIGURE 4: RIGHT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPERS, SADDLE CLAMPS AND TUBE CLAMP INSPECTION AND ELECTRICAL BONDING RESISTANCE
MEASUREMENT
(SHEET 1 OF 4)
Original Issue: August 14, 2025
Export Controlled ECCN: 9E991  777-28A0097 RB
See page 1 for details  58 of 73

### Page 59 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
WING
STRUCTURE
WING STRUCTURE
BRACKET
TUBE CLAMP
ENGINE FUEL
FEED TUBE
ATTACHMENT
FASTENERS
• DETAILED INSPECTION  3072424
FIGURE 4: RIGHT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPERS, SADDLE CLAMPS AND TUBE CLAMP INSPECTION AND ELECTRICAL BONDING RESISTANCE
MEASUREMENT
(SHEET 2 OF 4)
Original Issue: August 14, 2025
Export Controlled ECCN: 9E991  777-28A0097 RB
See page 1 for details  59 of 73

### Page 60 (OCR)

REQUIREMENTS BULLETIN 777-28A0097
ALERT  ALERT
FWD
DETAILED INSPECTION  3075841
FIGURE 4: RIGHT WING - FORWARD ENGINE FUEL FEED TUBE TO WING STRUCTURE - BONDING
JUMPERS, SADDLE CLAMPS AND TUBE CLAMP INSPECTION AND ELECTRICAL BONDING RESISTANCE
MEASUREMENT
(SHEET 3 OF 4)
Original Issue: August 14, 2025
777-28A0097 RB
Export Controlled ECCN: 9E991
See page 1 for details  60 of 73

The text continues at https://openairdocs.org/service-documents/boeing/777-28a0097-rb/file/eb5ff10b876c.md?from=61

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.