# Boeing Special Attention Service Bulletin 777-25-0607: Revision 2

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- Document: [Boeing Special Attention Service Bulletin 777-25-0607](https://openairdocs.org/service-documents/boeing/sb-777-25-0607.md)
- Title as filed: SB-777-25-0607-02
- Pages: 37
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## Text

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### Page 1

Commercial 
Airplanes
777
Service Bulletin
SPECIAL ATTENTION
Number: 777-25-0607
Original Issue: January 09, 2014
Revision 2: January 27, 2023
ATA System: 2511
SUBJECT: EQUIPMENT / FURNISHINGS - Flight Compartment Seats - Captain's and First Officer's
Seat - Manual Override Cable Inspection and Adjustment
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 © 2014 Boeing.
Unpublished Work. All Rights Reserved.
Treatment of this document and its content is governed by contract with Boeing. Rights to use this document
are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The
Boeing Company.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner,
BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and
Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in
connection with this document unless provided in writing by Boeing.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
1 of 37
6.0

### Page 2

Export Controlled ECCN: 9E991
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Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
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BOEING SERVICE BULLETIN 777-25-0607
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Table of Contents
Revision Transmittal Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 19
K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
M. Software Accomplishment Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
C. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 21
3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 21
3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
FIGURE 1: FLIGHT COMPARTMENT SEATS - SEAT IDENTIFICATION . . . . . . . . . . . . . . . . 36
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
3 of 37
BOEING SERVICE BULLETIN 777-25-0607

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Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
4 of 37
BOEING SERVICE BULLETIN 777-25-0607
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Commercial 
Airplanes
777
Service Bulletin
SPECIAL ATTENTION
Revision Transmittal SheetNumber: 777-25-0607Original Issue: January 09, 2014
Revision 2: January 27, 2023
ATA System: 2511
SUBJECT: EQUIPMENT / FURNISHINGS - Flight Compartment Seats - Captain's and First Officer's
Seat - Manual Override Cable Inspection and Adjustment
This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION
Federal Aviation Administration (FAA) Airworthiness Directive AD 2019-16-05 is related to this service bulletin.
The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to
this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service
bulletin mandatory.
Effects of this Revision on airplanes on which the Original Issue or Revision 1 was previously done:
ActionConditionGroup
Do 'Captain's and First Officer's Seats (with
'1Z' part numbers suffix) Inspection and
Manual Override Cable Adjustment' in Work
Instructions.
Airplanes that have inspected and have done all
applicable corrective actions for the installed
Captain's and First Officer's seats that were
identified in the Original Issue and Revision 1 of
this service bulletin.
Group 1, Con-
figuration 2
REASON FOR REVISION
This revision is sent to add new requirements for Ipeco seat part numbers 3A258-0041-01-1Z and
3A258-0042-01-1Z ('1Z' part number suffix). This revision is also sent to list newer issue numbers for each
concurrent supplier service bulletin, and to add conditional information for Ipeco seats that used specific revisions
of Ipeco Component Maintenance Manuals (CMMs) to do manual override cable maintenance.
These sections were changed:
1. Summary, Background; changed information, added Service Related Problem (SRP) reference, and
changed the AD related information in the planning table.
2. Summary, Action; added applicability, changed and added information, and changed the note.
3. Summary, Compliance; changed information and added AD information.
4. Summary, Illustration; changed and added information.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
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5. Paragraph 1.A.1., Airplanes; added Configurations for Group 1, changed and added information, listed
specific line numbers and line number ranges, and replaced the note.
6. Paragraph 1.A.2., Spares Affected; added part numbers.
7. Paragraph 1.B., Concurrent Requirements; added applicability, changed to list newer issue numbers
of each supplier service bulletin, and added part numbers.
8. Paragraph 1.C., Reason; changed information, added SRP reference, and added Revision 2 information.
9. Paragraph 1.D., Description; added applicability, changed and added information, and added Revision
2 information.
10. Paragraph 1.E., Compliance; added and changed information, and added applicability.
11. Paragraph 1.F., Approval; changed information and added Alternative Method Of Compliance (AMOC)
paragraph.
12. Paragraph 1.G., Manpower; added applicability, added a footnote and changed information.
13. Paragraph 1.J.1., Existing Data; added references.
14. Paragraph 2.C.2., Parts and Materials Supplied by the Operator; changed information.
15. Paragraph 3.B., Work Instructions;
– added Ipeco and Boeing seat part numbers.
– added Ipeco CMMs and listed newer issue numbers for each Ipeco service bulletin.
– added conditional information for manual override cable maintenance history.
– changed to add 'Captain's and First Officer's Seats (without '1Z' part numbers suffix) Inspection
and Manual Override Cable Adjustment' heading and added 'Captain's and First Officer's Seats
(with '1Z' part numbers suffix) Inspection and Manual Override Cable Adjustment' work instructions.
– changed the 'serviceable seat' definition for part number series 3A201 and 3A258 seats.
– changed an instruction, corrected an instruction, added information, and added applicability.
Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity and format changes,
to show the location of all content changes.
Pages with no vertical lines have no changes.
REVISION HISTORY
January 09, 2014Original Issue:
July 17, 2018Revision 1:
January 27, 2023Revision 2:
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
6 of 37
BOEING SERVICE BULLETIN 777-25-0607

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Commercial 
Airplanes
777
Service Bulletin
SPECIAL ATTENTION
SummaryNumber: 777-25-0607Original Issue: January 09, 2014
Revision 2: January 27, 2023
ATA System: 2511
SUBJECT: EQUIPMENT / FURNISHINGS - Flight Compartment Seats - Captain's and First Officer's
Seat - Manual Override Cable Inspection and Adjustment
BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS DOCUMENT IMMEDIATELY.
CONCURRENT REQUIREMENTS
Refer to Paragraph 1.B., Concurrent Requirements.
BACKGROUND
Accomplishment of this service bulletin will make sure that Captain's and First Officer's seats do not have
un-commanded movement due to an improperly adjusted cable for the manual release lever. If this service
bulletin is not done, the manual control lever cable could be incorrectly adjusted which could result in its clutch
mechanism (dogs) not engaging correctly and cause an un-commanded seat movement. An un-commanded
seat movement during a critical part of a flight, such as take-off or landing could cause a flight control obstruction
or unintended flight control input which could result in the loss of the ability to control the airplane.
A 747 operator reported that during a takeoff, the First Officer's seat unlocked from its seat tracks and moved
aft. The First Officer was unable to control the airplane and the Captain took over the controls to avoid a rejected
takeoff. The unlocking of the seat from the seat tracks was caused by actuator damage which was a result of
incorrect adjustment of the seats manual release lever cable, allowing the clutch dogs to only partially engage.
Because 777 airplanes use the same seats in the flight compartment, Boeing has issued this service bulletin to
do a one-time inspection, and if necessary an adjustment, in accordance with an Ipeco Service Bulletin. Two
Ipeco Service Bulletins have been issued to account for different part number seats installed. Because of
in-service seat interchangeability, operators are told to inspect the part number of the seats installed and use
the applicable Ipeco Service Bulletin.
This service bulletin gives instructions to find the identification of the installed Captain's and First Officer's seats,
and to do an inspection, and if necessary, an adjustment, of each affected seats' fore/aft manual control lever
and vertical manual control lever in accordance with an Ipeco Service Bulletin. The inspection, and if necessary,
the adjustment, of the manual control levers of the Captain's and First Officer's seats, will make sure that the
seats do not have un-commanded seat movement due to improperly adjusted fore/aft and vertical manual control
levers.
Boeing Service Related Problem (SRP) 777-SRP-25-0320 and 777-SRP-25-0418 are related to this service
bulletin.
Boeing Fleet Team Digest (FTD) 777 FTD 25-13006 is related to this service bulletin.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
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This table is provided to operators for planning purposes only. Refer to the applicable sections for more
information.
ReferenceAffectedPlanning Data
Paragraph 1.A.2., Spares AffectedYesSpares Affected
Paragraph 1.E., Compliance and Paragraph
1.F., Approval
YesAD Related
Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change
Paragraph 1.I., Electrical Load DataNoElectrical Load Changed
Paragraph 1.K., Publications AffectedNoPublications Affected
Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected
(Flight Crew Operations Manual and/or
FAA Approved Airplane Flight Manual)
Paragraph 2.C.1., Kits/PartsNoKits/Parts Required
Paragraph 2.C.2., Parts and Materials Supplied
by the Operator
NoOperator Supplied Parts/Material
Paragraph 2.F., Special Tooling Necessary to
do this Service Bulletin
NoSpecial Tooling Required
ACTION (PRR 61777-278R)
Find the part number of the installed Captain's and First Officer's seats. If specific seat part numbers are found,
find the serial number of those seats, and find their manual override cable maintenance history. For each affected
Captain's and First Officer's seat, do a Detailed Inspection of the fore/aft manual control lever and the vertical
manual control lever on each seat for looseness in accordance with the applicable Ipeco Service Bulletin. If a
control lever inspection is not within limits, remove the seat and install a serviceable seat. Do an operational
test of each adjusted seat.
NOTE: A serviceable seat in this service bulletin is defined as part number 3A258-0041-01-2 (Captain's) and
part number 3A258-0042-01-2 (First Officer's), or it is a seat that has done the inspections and
allapplicable corrective actions in accordance with the applicable Ipeco service bulletin. Or, the manual
override cable maintenance has been completed on the seat in accordance with the Ipeco Component
Maintenance Manual (CMM) 25-10-87, Revision 28 or later, or in accordance with Ipeco CMM 25-11-38,
Revision 21 or later.
EFFECTIVITY
777-200/200LR/300/300ER/777F Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
Refer to Paragraph 1.A.2., Spares Affected, for the list of affected components.
COMPLIANCE
Federal Aviation Administration (FAA) Airworthiness Directive AD 2019-16-05 is related to this service bulletin.
The effective date of AD 2019-16-05 is October 8, 2019.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
8 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 9

The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to
this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service
bulletin mandatory.
Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION
Boeing warranty remedies are not available for the inspection and adjustment given in this service bulletin.
MANPOWER
Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION
None.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
9 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 10 (OCR)

BOEING SERVICE BULLETIN 777-25-0607
FIND THE PART NUMBER OF THE INSTALLED
FIRST OFFICER'S  CAPTAIN'S AND FIRST OFFICER'S SEATS.
SEAT  FIND THE SERIAL NUMBER OF SPECIFIC
SEAT PART NUMBERS, AND FIND THEIR
MANUAL OVERRIDE CÁBLE MAINTENANCE
HISTORY.
FOR EACH AFFECTED CAPTAIN'S AND
FIRST OFFICER'S SEAT, DO A DETAILED
INSPECTION OF TH  VERTICAL MANUAL
CONTR  LEVER FOR LOOSENESS IN
ACCOR  + THE APPLICABLE
IPECO  LETIN
IF A CONTRO  LEVER INSPECTION IS NOT
WITHIN LIMITS  REMOVE THE SEAT AND
INSTALL A SERVICEABLE SEAT. DO AN
OPERATIONAL TEST OF EACH ADJUSTED
SEAT.
FWD
CAPTAIN'S SEAT IS SHOWN
FIRST OFFICER'S SEAT IS OPPOSITE
(LEFT SIDE VIEW)
FWD
CAPTAIN'S SEAT IS SHOWN,
FIRST OFFICER'S SEAT IS OPPOSITE
(RIGHT SIDE VIEW)
FOR EACH AFFECTED CAPTAIN'S AND
FIRST OFFICER'S SEAT,  DO A DETAILED
INSPECTION OF THE FORE/AFT MANUAL
CONTROL LEVER FOR LOOSENESS IN
ACCORDANCE WITH THE APPLICABLE
IPECO SERVICE BULLETIN.
IF A CONTROL LEVER INSPECTION IS NOT
DPERATIONAL YES OF EACH ADUSTED
SEAT.
2965092
Original Issue: January 09, 2014
Revision 2: January 27, 2023  777-25-0607
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.  10 of 37

### Page 11

Commercial 
Airplanes
777
Service Bulletin
SPECIAL ATTENTION
Number: 777-25-0607
Original Issue: January 09, 2014
Revision 2: January 27, 2023
ATA System: 2511
SUBJECT: EQUIPMENT / FURNISHINGS - Flight Compartment Seats - Captain's and First Officer's
Seat - Manual Override Cable Inspection and Adjustment
BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS DOCUMENT IMMEDIATELY.
1.    PLANNING INFORMATION
A. Effectivity
1. Airplanes
Refer to Service Bulletin Index D624W001 Part 3 for Airplane Variable Number, Line Number, and
Serial Number data.
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, 1741-9999 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. Refer
to PRR 61777-278R for data about this change.
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
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
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### Page 12

DESCRIPTIONCONFIGURATIONGROUP
777-200/200LR/300/300ER/777F Airplanes equipped with powered
Ipeco Captain's and First Officer's seats part number series 3A201
and 3A258.
-1
Airplanes that have not done the Original Issue or Revision 1 of this
service bulletin.
1
Airplanes that have done the Original Issue or Revision 1 of this
service bulletin.
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
GroupVariable Number
1WB161 - WB177
1WB181 - WB194
1WB201 - WB215
1WB231 - WB247
1WB271 - WB273
1WB276 - WB286
1WB291 - WB302
1WB306 - WB307
1WB311 - WB337
1WB341 - WB342
1WB366 - WB368
1WB371 - WB388
1WB406
1WB411 - WB413
1WB416 - WB439
1WB446 - WB453
1WB476
1WB481 - WB484
1WB501 - WB512
1WB531 - WB537
1WB551 - WB554
1WB591 - WB597
GroupVariable Number
1WB601 - WB606
1WB611 - WB622
1WB631 - WB638
1WB646 - WB649
1WC051 - WC073
1WC101 - WC104
1WC111 - WC120
1WC221 - WC224
1WC241 - WC243
1WC281 - WC290
1WC301 - WC308
1WC361 - WC364
1WC371 - WC374
1WC381 - WC395
1WC441
1WC446 - WC449
1WC456 - WC459
1WC486 - WC493
1WC506 - WC508
1WC521 - WC522
1WC531 - WC536
1WC546 - WC548
Export Controlled ECCN: 9E991
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Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
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GroupVariable Number
1WC556
1WC566 - WC567
1WC571 - WC574
1WC581
1WC586 - WC587
1WC591 - WC595
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
GroupVariable Number
1WD846 - WD867
1WD871 - WD918
1WD921 - WD957
1WD966 - WD970
1WD981 - WD982
1WD986 - WD987
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
GroupVariable Number
1WE451 - WE484
1WE486 - WE493
1WE495 - WE499
1WE501 - WE504
1WE511 - WE516
1WE526 - WE528
1WE536 - WE549
1WE556 - WE573
1WE576 - WE587
1WE591
1WE601 - WE605
1WE626 - WE627
1WE631
1WE641 - WE642
1WE646 - WE647
1WE651 - WE661
1WE666 - WE677
1WE681 - WE689
1WE701 - WE705
1WE711 - WE712
1WE731 - WE732
1WE736 - WE740
1WE746 - WE772
1WE776 - WE786
1WE791 - WE792
1WE796 - WE798
1WE801 - WE806
1WE811 - WE812
1WE826 - WE828
1WE831 - WE835
1WE851 - WE853
1WE856 - WE857
1WE861 - WE863
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GroupVariable Number
1WE866 - WE868
1WE871
1WF001 - WF004
1WF016 - WF043
1WF046 - WF077
1WF081 - WF088
1WF096 - WF101
1WF106 - WF109
1WF111 - WF124
1WF131 - WF144
1WF146 - WF147
1WF151 - WF152
GroupVariable Number
1WF156 - WF173
1WF176 - WF184
1WF191
1WF201
1WF206 - WF217
1WF221 - WF228
1WF231 - WF248
1WF256 - WF258
1WF261 - WF262
1WF266 - WF288
1WF296
1WF301 - WF306
GroupVariable Number
1WF311 - WF316
1WF321
1WF326 - WF329
1WF336 - WF346
1WF356 - WF357
1WF366 - WF367
1WF371 - WF372
1WF376 - WF377
1WF381
1WF386
--
--
2. Spares Affected
Examine your spares supply for the parts or components identified below. If any parts or components
are found, refer to Paragraph 3.B., Work Instructions for the recommended action.
Part Number
3A201-0007-01-1
3A201-0007-01-1Z
3A201-0008-01-1
3A201-0008-01-1Z
3A258-0041-01-1
3A258-0041-01-1Z
3A258-0042-01-1
3A258-0042-01-1Z
B. Concurrent Requirements
The service bulletin(s) listed below must be done before or at the same time as this service bulletin:
DescriptionService BulletinCompany
Captain's and First Officer's seat manual
override cable adjustment check.
Ipeco SB 201-25-04, Issue 2 or Issue 3(a)(b)Ipeco Holdings Ltd
Captain's and First Officer's seat manual
override cable adjustment check.
Ipeco SB 201-25-04, Issue 4 (e)(f)Ipeco Holdings Ltd
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DescriptionService BulletinCompany
Captain's and First Officer's seat manual
override cable adjustment check.
Ipeco SB 258-25-08, Issue 4 or Issue 5 (c)(d)Ipeco Holdings Ltd
Captain's and First Officer's seat manual
override cable adjustment check.
Ipeco SB 258-25-08, Issue 6 (g)(h)Ipeco Holdings Ltd
(a) Applicable to Captain's seat part number 3A201-0007-01-1.
(b) Applicable to First Officer's seat part number 3A201-0008-01-1.
(c) Applicable to Captain's seat part number 3A258-0041-01-1.
(d) Applicable to First Officer's seat part number 3A258-0042-01-1.
(e) Applicable to Captain's seat part numbers 3A201-0007-01-1 and 3A201-0007-01-1Z.
(f) Applicable to First Officer's seat part numbers 3A201-0008-01-1 and 3A201-0008-01-1Z.
(g) Applicable to Captain's seat part numbers 3A258-0041-01-1 and 3A258-0041-01-1Z.
(h) Applicable to First Officer's seat part numbers 3A258-0042-01-1 and 3A258-0042-01-1Z.
C. Reason
Accomplishment of this service bulletin will make sure that Captain's and First Officer's seats do not
have un-commanded movement due to an improperly adjusted cable for the manual release lever. If
this service bulletin is not done, the manual control lever cable could be incorrectly adjusted which
could result in its clutch mechanism (dogs) not engaging correctly and cause an un-commanded seat
movement. An un-commanded seat movement during a critical part of a flight, such as take-off or
landing could cause a flight control obstruction or unintended flight control input which could result in
the loss of the ability to control the airplane.
A 747 operator reported that during a takeoff, the First Officer's seat unlocked from its seat tracks and
moved aft. The First Officer was unable to control the airplane and the Captain took over the controls
to avoid a rejected takeoff. The unlocking of the seat from the seat tracks was caused by actuator
damage which was a result of incorrect adjustment of the seats manual release lever cable, allowing
the clutch dogs to only partially engage. Because 777 airplanes use the same seats in the flight
compartment, Boeing has issued this service bulletin to do a one-time inspection, and if necessary an
adjustment, in accordance with an Ipeco Service Bulletin. Two Ipeco Service Bulletins have been issued
to account for different part number seats installed. Because of in-service seat interchangeability,
operators are told to inspect the part number of the seats installed and use the applicable Ipeco Service
Bulletin.
This service bulletin gives instructions to find the identification of the installed Captain's and First
Officer's seats, and to do an inspection, and if necessary, an adjustment, of each affected seats' fore/aft
manual control lever and vertical manual control lever in accordance with an Ipeco Service Bulletin.
The inspection, and if necessary, the adjustment, of the manual control levers of the Captain's and
First Officer's seats, will make sure that the seats do not have un-commanded seat movement due to
improperly adjusted fore/aft and vertical manual control levers.
Boeing Service Related Problem (SRP) 777-SRP-25-0320 and 777-SRP-25-0418 are related to this
service bulletin.
Boeing Fleet Team Digest (FTD) 777 FTD 25-13006 is related to this service bulletin.
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Revision 1 was sent to add delivered 777 airplanes that had Ipeco powered Captain's and First Officer's
seats installed during production or in retrofit, and all future deliveries with Ipeco powered Captain's
and First Officer's seats to the effectivity of this service bulletin. This revision also adds instructions to
identify specific Captain's and First Officer's seat serial numbers for seat part numbers 3A258-0041-01-1
and 3A258-0042-01-1. Also seat part numbers 3A258-0041-01-2 and 3A258-0042-01-2 were added
to the Serviceable Seat definition.
Revision 2 is sent to add new requirements for Ipeco seat part numbers 3A258-0041-01-1Z and
3A258-0042-01-1Z ('1Z' part number suffix). This revision is also sent to list newer issue numbers for
each concurrent supplier service bulletin, and to add conditional information for Ipeco seats that used
specific revisions of Ipeco Component Maintenance Manuals (CMMs) to do manual override cable
maintenance.
D. Description
Find the part number of the installed Captain's and First Officer's seats. If specific seat part numbers
are found, find the serial number of those seats, and find their manual override cable maintenance
history. For each affected Captain's and First Officer's seat, do a Detailed Inspection of the fore/aft
manual control lever and the vertical manual control lever on each seat for looseness in accordance
with the applicable Ipeco Service Bulletin. If a control lever inspection is not within limits, remove the
seat and install a serviceable seat. Do an operational test of each adjusted seat.
NOTE: A serviceable seat in this service bulletin is defined as part number 3A258-0041-01-2
(Captain's) and part number 3A258-0042-01-2 (First Officer's), or it is a seat that has done
the inspections and all applicable corrective actions in accordance with the applicable Ipeco
service bulletin. Or, the manual override cable maintenance has been completed on the seat
in accordance with the Ipeco Component Maintenance Manual (CMM) 25-10-87, Revision 28
or later, or in accordance with Ipeco CMM 25-11-38, Revision 21 or later.
Effects of Revision 2 on airplanes on which the Original Issue or Revision 1 was previously done:
ActionConditionGroup
Do 'Captain's and First Officer's Seats (with
'1Z' part numbers suffix) Inspection and
Manual Override Cable Adjustment' in Work
Instructions.
Airplanes that have inspected and have done all
applicable corrective actions for the installed
Captain's and First Officer's seats that were
identified in the Original Issue and Revision 1 of
this service bulletin.
Group 1, Con-
figuration 2
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones
ZoneModel
211, 212777-200, 777-200LR, 777-300,
777-300ER, 777F
E. Compliance
Federal Aviation Administration (FAA) Airworthiness Directive AD 2019-16-05 is related to this service
bulletin. The effective date of AD 2019-16-05 is October 8, 2019.
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The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive
related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times
given in this service bulletin mandatory.
Group 1, Configuration 1:
Boeing recommends that Captain's and First Officer's Seats (without '1Z' part numbers suffix) Inspection
and Manual Override Cable Adjustment given in this service bulletin be done within 72 months after
the Original Issue date of this service bulletin.
Boeing recommends that Captain's and First Officer's Seats (with '1Z' part numbers suffix) Inspection
and Manual Override Cable Adjustment given in this service bulletin be done within 36 months after
the Revision 2 date of this service bulletin.
F. Approval
This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified
in this service bulletin comply with the applicable regulations and are FAA approved, as well as European
Union Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA
approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were
based on the airplane in its original Boeing delivery configuration or as modified by other approved
Boeing changes.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected
by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval
before incorporating this service bulletin.
In addition, the Manager of the FAA Seattle ACO Branch approves accomplishment of the inspections,
adjustments and installation, defined in SB 777-25-0607, Revision 2 as an alternative method of
compliance to accomplishing the inspections, adjustments and installation, required by paragraph (g)
of AD 2019-16-05. All provisions of AD 2019-16-05 that are not specifically referenced in the above
statement remain fully applicable and must be complied with accordingly.
G. Manpower
The table below shows an estimate of the task hours necessary to do this service bulletin for each
airplane. This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with
operator task hour data if necessary. The estimate does not include lost time. These are some examples
of lost time:
• Time to adjust to the workplace
• Time to schedule the work
• Time to inspect the work
• Time to cure the materials
• Time to make the parts
• Time to find the tools.
Elapsed HoursTask HoursNumber of Per-
sons
Task
0.050.051Open Access
0.200.201FIGURE 1(e)
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Elapsed HoursTask HoursNumber of Per-
sons
Task
0.500.501Removal of the Captain's
Seat (a)
0.500.501Installation of the Captain's
Seat (b)
0.500.501Removal of the First Offi-
cer's Seat (a)
0.500.501Installation of the First Offi-
cer's Seat (b)
0.250.251Operational Test of the
Captain's Seat (c)
0.250.251Operational Test of the First
Officer's Seat (c)
0.050.051Close Access
(d)(d)TOTAL FOR EACH AIRPLANE
(a) Only necessary if it is not possible to adjust the seat with the seat installed.
(b) Only necessary if the seat was removed.
(c) Only necessary if the seat was adjusted in accordance with the applicable Ipeco
Service Bulletin.
(d) The total task hours and elapsed hours are not given as the work necessary for each
airplane is variable.
(e) Only necessary if maintenance documentation cannot be used to find the identification
of the seat(s).
For affected seat(s), the time to do the inspection and adjustment in accordance with Ipeco SB 201-25-04
and Ipeco SB 258-25-08 is not included.
H. Weight and Balance Changes
None.
I. Electrical Load Data
Not changed.
J. References
1. Existing Data:
a. Engineering Change Memo PRR 61777-278R
b. Boeing Service Related Problem (SRP) 777-SRP-25-0320, 777-SRP-25-0418
c. Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2019-16-05
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d. Service Bulletin Index D624W001
e. 777 Fleet Team Digest (FTD) 25-13006
f. 777 Aircraft Maintenance Manual (AMM) 25-11-01
g. Ipeco Component Maintenance Manual (CMM) 25-10-87, 25-11-38
h. Ipeco Service Bulletin 201-25-04, 258-25-08
NOTE: The supplier was told to send copies of the service bulletins to each operator.
2. Data Supplied with this Service Bulletin:
None.
3. Installation Drawings Used in the Preparation of this Service Bulletin:
None.
K. Publications Affected
1. Publications:
None.
2. Damage Tolerance Based Structural Inspections:
Boeing has evaluated the repairs and/or changes in this service bulletin for effects on Fatigue
Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the
Maintenance Program. This service bulletin does not affect FCS, therefore DTIs are not necessary.
L. Interchangeability and Intermixability of Parts
Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.
M. Software Accomplishment Summary
Not affected.
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2.    MATERIAL INFORMATION
A. Material - Price and Availability
None.
B. Industry Support Information
Boeing warranty remedies are not available for the inspection and adjustment given in this service
bulletin.
C. Parts Necessary for Each Airplane
1. Kits/Parts
None.
2. Parts and Materials Supplied by the Operator
No parts or materials are necessary to do the change in this service bulletin. However, parts and
materials in the manuals given in Paragraph 1.J., References, can be necessary. Examine operator
part and material supply to make sure all necessary parts and materials are available.
3. Parts Modified and Reidentified
None.
4. Parts Removed and Not Replaced
None.
D. Parts Necessary to Change Spares
None.
E. Special Tooling - Price and Availability
None.
F. Special Tooling Necessary to do this Service Bulletin
No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance
and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine
operator tool supply to make sure all necessary tools are available.
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3.    ACCOMPLISHMENT INSTRUCTIONS
A. GENERAL INFORMATION
KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF
METAL PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED
MATERIAL, METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE
BUNDLES CAN CAUSE DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES
CAN CAUSE SPARKS OR OTHER ELECTRICAL DAMAGE.
CAUTION
NOTE: 1. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for
definition of the acronyms.
2. Obey all of the warnings and cautions given in the specified manual sections.
3. 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 airframe maintenance tasks are included in Chapter 20 of 777
Aircraft Maintenance Manual (AMM).
— Non-standard torque values for maintenance tasks are included in the
applicable installation step.
4. A Detailed Inspection is defined as: An intensive examination of a specific item,
installation or assembly to detect damage, failure or irregularity. This could include
tactile assessment in which a component or assembly can be checked for
tightness/security. Available lighting is normally supplemented with a direct source
of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors
and magnifying lenses may be necessary. Surface cleaning and elaborate access
procedures may be required.
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. 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.
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7. This service bulletin includes operational test procedures for the systems changed
by this service bulletin. More operational tests can possibly be necessary in
accordance with standard maintenance practices because of interruption to other
airplane systems.
8. If shading is used, shaded areas in Figures are to separate the non-critical and
non-authoritative information from the critical and authoritative information.
9. The compliance times for the actions in Paragraph 3.B., WORK INSTRUCTIONS
are in Paragraph 1.E., Compliance.
B. WORK INSTRUCTIONS
Group 1, Configuration 1:
Captain's and First Officer's Seats (without '1Z' part numbers suffix) Inspection and Manual
Override Cable Adjustment
1. Get access to the flight compartment.
2. Inspect to find the identification of the installed Captain's and First Officer's seats in accordance
with FIGURE 1, and do the action(s) that follow related to the part number found:
NOTE: If the identification of the Captain's and First Officer's seats that are installed on the
airplane can be determined by review of maintenance documentation, then it is not
necessary to do the FIGURE 1 inspection.
a. If the installed Captain's seat has the Ipeco part number given in the table below, no further
action is required for this seat.
Boeing Part NumberIpeco Part Number
S232T311-1033A258-0041-01-2
b. If the installed Captain's seat has an Ipeco part number given in the table below and that part
number does not have a serial number identified by the effectivity of Ipeco SB 258-25-08,
Issue 4 or Issue 5 or Issue 6, no further action is required for this seat.
Boeing Part NumberIpeco Part Number
S232T311-1033A258-0041-01-1
c. If the installed Captain's seat has an Ipeco part number given in the table below, which also
has a serial number identified by the effectivity of Ipeco SB 258-25-08, Issue 4 or Issue 5 or
Issue 6, and the manual override cable maintenance has been completed on the seat in
accordance with the Ipeco Component Maintenance Manual (CMM) given in the table below,
no further action is required for this seat.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-11-38,S232T311-1033A258-0041-01-1
Revision 21 or later
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d. If the installed Captain's seat has an Ipeco part number given in the table below, and the
manual override cable maintenance has been completed on the seat in accordance with the
Ipeco Component Maintenance Manual (CMM) given in the table below, no further action is
required for this seat.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-10-87,S232W311-13A201-0007-01-1
Revision 28 or later
e. If the installed Captain's seat has an Ipeco part number given in the table below, and this seat
has not done manual override cable maintenance, or the manual override cable maintenance
has been completed on the seat not in accordance with the Ipeco Component Maintenance
Manual (CMM) given in the table below, or the manual override cable maintenance history of
this seat is not known, do a Detailed Inspection of the fore/aft manual control lever and the
vertical manual control lever of the Captain's seat for looseness in accordance with Ipeco SB
201-25-04, Issue 2 or Issue 3 or Issue 4.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-10-87,S232W311-13A201-0007-01-1
Revision 28 or later
(1) If the movement at the end of the control cable for the fore/aft or vertical manual control
lever is not within the limits given in Ipeco SB 201-25-04, Issue 2 or Issue 3 or Issue 4,
do the steps that follow:
(a) Remove the Captain's seat. Refer to 777 AMM 25-11-01 as an accepted procedure.
NOTE: Operators can choose not to remove the Captain's seat if there is sufficient
access to adjust the Captain's seat in accordance with Ipeco SB 201-25-04,
Issue 2 or Issue 3 or Issue 4, with the seat installed.
(b) Install a serviceable Captain's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: A serviceable Captain's seat in this service bulletin is defined as part number
3A258-0041-01-2, or it is a Captain's seat that has done the inspections
and all applicable corrective actions in accordance with the applicable Ipeco
service bulletin. Or the manual override cable maintenance has been
completed on the seat in accordance with the Ipeco Component
Maintenance Manual (CMM) 25-11-38, Revision 21 or later, or in accordance
with Ipeco CMM 25-10-87, Revision 28 or later.
(2) If the movement at the end of the control cable for the fore/aft and vertical manual control
levers is within the limits given in Ipeco SB 201-25-04, Issue 2 or Issue 3 or Issue 4, no
more work is necessary on the Captain's seat.
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f. If the installed Captain's seat has an Ipeco part number given in the table below, which also
has a serial number identified by the effectivity of Ipeco SB 258-25-08, Issue 4 or Issue 5 or
Issue 6, and this seat has not done manual override cable maintenance, or the manual override
cable maintenance has been completed on the seat not in accordance with the Ipeco
Component Maintenance Manual (CMM) given in the table below, or the manual override
cable maintenance history of this seat is not known, do a Detailed Inspection of the fore/aft
manual control lever and the vertical manual control lever of the Captain's seat for looseness
in accordance with Ipeco SB 258-25-08, Issue 4 or Issue 5 or Issue 6.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-11-38,S232T311-1033A258-0041-01-1
Revision 21 or later
(1) If the movement at the end of the control cable for the fore/aft or vertical manual control
lever is not within the limits given in Ipeco SB 258-25-08, Issue 4 or Issue 5 or Issue 6,
do the steps that follow:
(a) Remove the Captain's seat. Refer to 777 AMM 25-11-01 as an accepted procedure.
NOTE: Operators can choose not to remove the Captain's seat if there is sufficient
access to adjust the Captain's seat in accordance with Ipeco SB 258-25-08,
Issue 4 or Issue 5 or Issue 6, with the seat installed.
(b) Install a serviceable Captain's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: A serviceable Captain's seat in this service bulletin is defined as part number
3A258-0041-01-2, or it is a Captain's seat that has done the inspections
and all applicable corrective actions in accordance with the applicable Ipeco
service bulletin. Or the manual override cable maintenance has been
completed on the seat in accordance with the Ipeco Component
Maintenance Manual (CMM) 25-11-38, Revision 21 or later, or in accordance
with Ipeco CMM 25-10-87, Revision 28 or later.
(2) If the movement at the end of the control cable for the fore/aft and vertical manual control
levers is within the limits given in Ipeco SB 258-25-08, Issue 4 or Issue 5 or Issue 6, no
more work is necessary on the Captain's seat.
g. If the installed First Officer's seat has the Ipeco part number given in the table below, no further
action is required for this seat.
Boeing Part NumberIpeco Part Number
S232T311-1043A258-0042-01-2
h. If the installed First Officer's seat has an Ipeco part number given in the table below and that
part number does not have a serial number identified by the effectivity of Ipeco SB 258-25-08,
Issue 4 or Issue 5 or Issue 6, no further action is required for this seat.
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Boeing Part NumberIpeco Part Number
S232T311-1043A258-0042-01-1
i. If the installed First Officer's seat has an Ipeco part number given in the table below, which
also has a serial number identified by the effectivity of Ipeco SB 258-25-08, Issue 4 or Issue
5 or Issue 6, and the manual override cable maintenance has been completed on the seat in
accordance with the Ipeco Component Maintenance Manual (CMM) given in the table below,
no further action is required for this seat.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-11-38,S232T311-1043A258-0042-01-1
Revision 21 or later
j. If the installed First Officer's seat has an Ipeco part number given in the table below, and the
manual override cable maintenance has been completed on the seat in accordance with the
Ipeco Component Maintenance Manual (CMM) given in the table below, no further action is
required for this seat.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-10-87,S232W311-23A201-0008-01-1
Revision 28 or later
k. If the installed First Officer's seat has an Ipeco part number given in the table below, and this
seat has not done manual override cable maintenance, or the manual override cable
maintenance has been completed on the seat not in accordance with the Ipeco Component
Maintenance Manual (CMM) given in the table below, or the manual override cable maintenance
history of this seat is not known, do a Detailed Inspection of the fore/aft manual control lever
and the vertical manual control lever of the First Officer's seat for looseness in accordance
with Ipeco SB 201-25-04, Issue 2 or Issue 3 or Issue 4.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-10-87,S232W311-23A201-0008-01-1
Revision 28 or later
(1) If the movement at the end of the control cable for the fore/aft or vertical manual control
lever is not within the limits given in Ipeco SB 201-25-04, Issue 2 or Issue 3 or Issue 4,
do the steps that follow:
(a) Remove the First Officer's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: Operators can choose not to remove the First Officer's seat if there is
sufficient access to adjust the First Officer's seat in accordance with Ipeco
SB 201-25-04, Issue 2 or Issue 3 or Issue 4, with the seat installed.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
27 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 28

(b) Install a serviceable First Officer's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: A serviceable First Officer's seat in this service bulletin is defined as part
number 3A258-0042-01-2, or it is a First Officer's seat that has done the
inspections and all applicable corrective actions in accordance with the
applicable Ipeco service bulletin. Or the manual override cable maintenance
has been completed on the seat in accordance with the Ipeco Component
Maintenance Manual (CMM) 25-11-38, Revision 21 or later, or in accordance
with Ipeco CMM 25-10-87, Revision 28 or later.
(2) If the movement at the end of the control cable for the fore/aft and vertical manual control
levers is within the limits given in Ipeco SB 201-25-04, Issue 2 or Issue 3 or Issue 4, no
more work is necessary on the First Officer's seat.
l. If the installed First Officer's seat has an Ipeco part number given in the table below, which
also has a serial number identified by the effectivity of Ipeco SB 258-25-08, Issue 4 or Issue
5 or Issue 6, and this seat has not done manual override cable maintenance, or the manual
override cable maintenance has been completed on the seat not in accordance with the Ipeco
Component Maintenance Manual (CMM) given in the table below, or the manual override
cable maintenance history of this seat is not known, do a Detailed Inspection of the fore/aft
manual control lever and the vertical manual control lever of the First Officer's seat for
looseness in accordance with Ipeco SB 258-25-08, Issue 4 or Issue 5 or Issue 6.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-11-38,S232T311-1043A258-0042-01-1
Revision 21 or later
(1) If the movement at the end of the control cable for the fore/aft or vertical manual control
lever is not within the limits given in Ipeco SB 258-25-08, Issue 4 or Issue 5 or Issue 6,
do the steps that follow:
(a) Remove the First Officer's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: Operators can choose not to remove the First Officer's seat if there is
sufficient access to adjust the First Officer's seat in accordance with Ipeco
SB 258-25-08, Issue 4 or Issue 5 or Issue 6, with the seat installed.
(b) Install a serviceable First Officer's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: A serviceable First Officer's seat in this service bulletin is defined as part
number 3A258-0042-01-2, or it is a First Officer's seat that has done the
inspections and all applicable corrective actions in accordance with the
applicable Ipeco service bulletin. Or the manual override cable maintenance
has been completed on the seat in accordance with the Ipeco Component
Maintenance Manual (CMM) 25-11-38, Revision 21 or later, or in accordance
with Ipeco CMM 25-10-87, Revision 28 or later.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
28 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 29

(2) If the movement at the end of the control cable for the fore/aft and vertical manual control
levers is within the limits given in Ipeco SB 258-25-08, Issue 4 or Issue 5 or Issue 6, no
more work is necessary on the First Officer's seat.
3. For each Captain's and First Officer's seat that had its fore/aft manual control lever adjusted, do
the operational test that follows. If the Captain's or First Officer's seat fails the test, do corrective
actions and repeat the test until the test of the Captain's and First Officer's seat is passed.
a. Make sure there is no power supply to the seat.
b. While sitting in the seat and with the seat back fully upright, operate the fore/aft manual control
lever.
c. Move the seat to the aft most position and release the control lever.
d. Make sure that the seat locks in the aft most position.
e. Operate the fore/aft manual control lever.
f. Move the seat to the forward most position and release the control lever.
g. Make sure that the seat locks in the forward most position.
4. For each Captain's and First Officer's seat that had its vertical manual control lever adjusted, do
the operational test that follows. If the Captain's or First Officer's seat fails the test, do corrective
actions and repeat the test until the test of the Captain's and First Officer's seat is passed.
a. Make sure there is no power supply to the seat.
b. While sitting in the seat and with the seat back fully upright, operate the vertical manual control
lever.
c. Make sure that the seat locks in the highest position.
d. Operate the vertical manual control lever.
e. Move the seat to the lowest position and release the control lever.
f. Make sure that the seat locks in the lowest position.
5. Put the airplane back to a serviceable condition.
Captain's and First Officer's Seats (with '1Z' part numbers suffix) Inspection and Manual Override
Cable Adjustment
1. Get access to the flight compartment.
2. Inspect to find the identification of the installed Captain's and First Officer's seats in accordance
with FIGURE 1, and do the action(s) that follow related to the part number found:
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
29 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 30

NOTE: If the identification of the Captain's and First Officer's seats that are installed on the
airplane can be determined by review of maintenance documentation, then it is not
necessary to do the FIGURE 1 inspection.
a. If the installed Captain's seat has the Ipeco part number given in the table below and that part
number does not have a serial number identified by the effectivity of Ipeco SB 258-25-08,
Issue 6, no further action is required for this seat.
Boeing Part NumberIpeco Part Number
S232T311-1033A258-0041-01-1Z
b. If the installed Captain's seat has the Ipeco part number given in the table below, which also
has a serial number identified by the effectivity of Ipeco SB 258-25-08, Issue 6, and the manual
override cable maintenance has been completed on the seat in accordance with the Ipeco
Component Maintenance Manual (CMM) given in the table below, no further action is required
for this seat.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-11-38,S232T311-1033A258-0041-01-1Z
Revision 21 or later
c. If the installed Captain's seat has the Ipeco part number given in the table below, and the
manual override cable maintenance has been completed on the seat in accordance with the
Ipeco Component Maintenance Manual (CMM) given in the table below, no further action is
required for this seat.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-10-87,S232W311-13A201-0007-01-1Z
Revision 28 or later
d. If the installed Captain's seat has the Ipeco part number given in the table below, and this
seat has not done manual override cable maintenance, or the manual override cable
maintenance has been completed on the seat not in accordance with the Ipeco Component
Maintenance Manual (CMM) given in the table below, or the manual override cable maintenance
history of this seat is not known, do a Detailed Inspection of the fore/aft manual control lever
and the vertical manual control lever of the Captain's seat for looseness in accordance with
Ipeco SB 201-25-04, Issue 4.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-10-87,S232W311-13A201-0007-01-1Z
Revision 28 or later
(1) If the movement at the end of the control cable for the fore/aft or vertical manual control
lever is not within the limits given in Ipeco SB 201-25-04, Issue 4, do the steps that follow:
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
30 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 31

(a) Remove the Captain's seat. Refer to 777 AMM 25-11-01 as an accepted procedure.
NOTE: Operators can choose not to remove the Captain's seat if there is sufficient
access to adjust the Captain's seat in accordance with Ipeco SB 201-25-04,
Issue 4, with the seat installed.
(b) Install a serviceable Captain's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: A serviceable Captain's seat in this service bulletin is defined as part number
3A258-0041-01-2, or it is a Captain's seat that has done the inspections
and all applicable corrective actions in accordance with the applicable Ipeco
service bulletin. Or the manual override cable maintenance has been
completed on the seat in accordance with the Ipeco Component
Maintenance Manual (CMM) 25-11-38, Revision 21 or later, or in accordance
with Ipeco CMM 25-10-87, Revision 28 or later.
(2) If the movement at the end of the control cable for the fore/aft and vertical manual control
levers is within the limits given in Ipeco SB 201-25-04, Issue 4, no more work is necessary
on the Captain's seat.
e. If the installed Captain's seat has the Ipeco part number given in the table below, which also
has a serial number identified by the effectivity of Ipeco SB 258-25-08, Issue 6, and this seat
has not done manual override cable maintenance, or the manual override cable maintenance
has been completed on the seat not in accordance with the Ipeco Component Maintenance
Manual (CMM) given in the table below, or the manual override cable maintenance history of
this seat is not known, do a Detailed Inspection of the fore/aft manual control lever and the
vertical manual control lever of the Captain's seat for looseness in accordance with Ipeco SB
258-25-08, Issue 6.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-11-38,S232T311-1033A258-0041-01-1Z
Revision 21 or later
(1) If the movement at the end of the control cable for the fore/aft or vertical manual control
lever is not within the limits given in Ipeco SB 258-25-08, Issue 6, do the steps that follow:
(a) Remove the Captain's seat. Refer to 777 AMM 25-11-01 as an accepted procedure.
NOTE: Operators can choose not to remove the Captain's seat if there is sufficient
access to adjust the Captain's seat in accordance with Ipeco SB 258-25-08,
Issue 6, with the seat installed.
(b) Install a serviceable Captain's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
31 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 32

NOTE: A serviceable Captain's seat in this service bulletin is defined as part number
3A258-0041-01-2, or it is a Captain's seat that has done the inspections
and all applicable corrective actions in accordance with the applicable Ipeco
service bulletin. Or the manual override cable maintenance has been
completed on the seat in accordance with the Ipeco Component
Maintenance Manual (CMM) 25-11-38, Revision 21 or later, or in accordance
with Ipeco CMM 25-10-87, Revision 28 or later.
(2) If the movement at the end of the control cable for the fore/aft and vertical manual control
levers is within the limits given in Ipeco SB 258-25-08, Issue 6, no more work is necessary
on the Captain's seat.
f. If the installed First Officer's seat has the Ipeco part number given in the table below and that
part number does not have a serial number identified by the effectivity of Ipeco SB 258-25-08,
Issue 6, no further action is required for this seat.
Boeing Part NumberIpeco Part Number
S232T311-1043A258-0042-01-1Z
g. If the installed First Officer's seat has the Ipeco part number given in the table below, which
also has a serial number identified by the effectivity of Ipeco SB 258-25-08, Issue 6, and the
manual override cable maintenance has been completed on the seat in accordance with the
Ipeco Component Maintenance Manual (CMM) given in the table below, no further action is
required for this seat.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-11-38,S232T311-1043A258-0042-01-1Z
Revision 21 or later
h. If the installed First Officer's seat has the Ipeco part number given in the table below, and the
manual override cable maintenance has been completed on the seat in accordance with the
Ipeco Component Maintenance Manual (CMM) given in the table below, no further action is
required for this seat.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-10-87,S232W311-23A201-0008-01-1Z
Revision 28 or later
i. If the installed First Officer's seat has the Ipeco part number given in the table below, and this
seat has not done manual override cable maintenance, or the manual override cable
maintenance has been completed on the seat not in accordance with the Ipeco Component
Maintenance Manual (CMM) given in the table below, or the manual override cable maintenance
history of this seat is not known, do a Detailed Inspection of the fore/aft manual control lever
and the vertical manual control lever of the First Officer's seat for looseness in accordance
with Ipeco SB 201-25-04, Issue 4.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
32 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 33

Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-10-87,S232W311-23A201-0008-01-1Z
Revision 28 or later
(1) If the movement at the end of the control cable for the fore/aft or vertical manual control
lever is not within the limits given in Ipeco SB 201-25-04, Issue 4, do the steps that follow:
(a) Remove the First Officer's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: Operators can choose not to remove the First Officer's seat if there is
sufficient access to adjust the First Officer's seat in accordance with Ipeco
SB 201-25-04, Issue 4, with the seat installed.
(b) Install a serviceable First Officer's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: A serviceable First Officer's seat in this service bulletin is defined as part
number 3A258-0042-01-2, or it is a First Officer's seat that has done the
inspections and all applicable corrective actions in accordance with the
applicable Ipeco service bulletin. Or the manual override cable maintenance
has been completed on the seat in accordance with the Ipeco Component
Maintenance Manual (CMM) 25-11-38, Revision 21 or later, or in accordance
with Ipeco CMM 25-10-87, Revision 28 or later.
(2) If the movement at the end of the control cable for the fore/aft and vertical manual control
levers is within the limits given in Ipeco SB 201-25-04, Issue 4, no more work is necessary
on the First Officer's seat.
j. If the installed First Officer's seat has the Ipeco part number given in the table below, which
also has a serial number identified by the effectivity of Ipeco SB 258-25-08, Issue 6, and this
seat has not done manual override cable maintenance, or the manual override cable
maintenance has been completed on the seat not in accordance with the Ipeco Component
Maintenance Manual (CMM) given in the table below, or the manual override cable maintenance
history of this seat is not known, do a Detailed Inspection of the fore/aft manual control lever
and the vertical manual control lever of the First Officer's seat for looseness in accordance
with Ipeco SB 258-25-08, Issue 6.
Ipeco Component
Maintenance Manual
Boeing Part NumberIpeco Part Number
CMM 25-11-38,S232T311-1043A258-0042-01-1Z
Revision 21 or later
(1) If the movement at the end of the control cable for the fore/aft or vertical manual control
lever is not within the limits given in Ipeco SB 258-25-08, Issue 6, do the steps that follow:
(a) Remove the First Officer's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
33 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 34

NOTE: Operators can choose not to remove the First Officer's seat if there is
sufficient access to adjust the First Officer's seat in accordance with Ipeco
SB 258-25-08, Issue 6, with the seat installed.
(b) Install a serviceable First Officer's seat. Refer to 777 AMM 25-11-01 as an accepted
procedure.
NOTE: A serviceable First Officer's seat in this service bulletin is defined as part
number 3A258-0042-01-2, or it is a First Officer's seat that has done the
inspections and all applicable corrective actions in accordance with the
applicable Ipeco service bulletin. Or the manual override cable maintenance
has been completed on the seat in accordance with the Ipeco Component
Maintenance Manual (CMM) 25-11-38, Revision 21 or later, or in accordance
with Ipeco CMM 25-10-87, Revision 28 or later.
(2) If the movement at the end of the control cable for the fore/aft and vertical manual control
levers is within the limits given in Ipeco SB 258-25-08, Issue 6, no more work is necessary
on the First Officer's seat.
3. For each Captain's and First Officer's seat that had its fore/aft manual control lever adjusted, do
the operational test that follows. If the Captain's or First Officer's seat fails the test, do corrective
actions and repeat the test until the test of the Captain's and First Officer's seat is passed.
a. Make sure there is no power supply to the seat.
b. While sitting in the seat and with the seat back fully upright, operate the fore/aft manual control
lever.
c. Move the seat to the aft most position and release the control lever.
d. Make sure that the seat locks in the aft most position.
e. Operate the fore/aft manual control lever.
f. Move the seat to the forward most position and release the control lever.
g. Make sure that the seat locks in the forward most position.
4. For each Captain's and First Officer's seat that had its vertical manual control lever adjusted, do
the operational test that follows. If the Captain's or First Officer's seat fails the test, do corrective
actions and repeat the test until the test of the Captain's and First Officer's seat is passed.
a. Make sure there is no power supply to the seat.
b. While sitting in the seat and with the seat back fully upright, operate the vertical manual control
lever.
c. Make sure that the seat locks in the highest position.
d. Operate the vertical manual control lever.
e. Move the seat to the lowest position and release the control lever.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
34 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 35

f. Make sure that the seat locks in the lowest position.
5. Put the airplane back to a serviceable condition.
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2: January 27, 2023
35 of 37
BOEING SERVICE BULLETIN 777-25-0607

### Page 36 (OCR)

BOEING SERVICE BULLETIN 777-25-0607
FWD
CAPTAIN'S SEAT
(LEFT SIDE VIEW)
FIRST OFFICER'S SEAT
(LEFT SIDE VIEW)
2294814
FIGURE 1: FLIGHT COMPARTMENT SEATS - SEAT IDENTIFICATION
(SHEET 1 OF 2)
Original Issue: January 09, 2014
Revision 2 January 27, 2023  777-25-0607
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.  36 of 37

### Page 37

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 each airplane.
More DataQtyIdentificationNameTaskStep
(a)1-Captain's SeatInspect1
(a)1-First Officer's SeatInspect2
(a) Inspect the nameplate located on the rear face of the seat base to find the identification (part number
and, if necessary, serial number) of the installed seat.
FIGURE 1: FLIGHT COMPARTMENT SEATS - SEAT IDENTIFICATION
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991
Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 09, 2014
777-25-0607Revision 2 January 27, 2023
37 of 37
BOEING SERVICE BULLETIN 777-25-0607

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