# Boeing Alert Service Bulletin MD11-24A204: Revision 2

- Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2021-0564; AD 2021-24-02 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Boeing Alert Service Bulletin MD11-24A204](https://openairdocs.org/service-documents/boeing/md11-24a204.md)
- Title as filed: MD11-24A204 R02 ---BOEING
- Pages: 59
- PDF: https://openairdocs.org/files/sha256/01/d8/01d8ec841fe9ffe5d685fdda4dce71f46f7cf536783553f6175835b69dd2a7bb
- Page: https://openairdocs.org/service-documents/boeing/md11-24a204/file/01d8ec841fe9

## 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
MD11
Service Bulletin
ALERT
Number: MD11-24A204
Original Issue: July 19, 2002
Revision 2: April 14, 2021
ATA System: 2400
SUBJECT: ELECTRICAL POWER - Electrical Power, General - Install Tube Sleeving, Grommet,
and Spacer on Observer Station Upper Main Circuit Breaker Panel Wiring
Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15
CFR 300-774). An export license may be required before it is used for development, production or use by foreign
persons from specific countries. The controller of this data has the individual responsibility to abide by all export
laws.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET
Copyright © 2002 Boeing.
Unpublished Work. All Rights Reserved.
Treatment of this document and its content is governed by contract with Boeing. Rights to use this document
are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The
Boeing Company.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner,
BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and
Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in
connection with this document unless provided in writing by Boeing.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
1 of 59
4.0

### Page 2

Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
2 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT
BLANK PAGE

### Page 3

Table of Contents
Revision Transmittal Sheet ............................................ 5
S u m m a r y  ...................................................... 9
1. PLANNING INFORMATION ........................................ 1 1
A . E f f e c t i v i t y  ............................................... 1 1
1. Airplanes ............................................ 1 1
2 . S p a r e s  A f f e c t e d  ........................................ 1 2
B. Concurrent Requirements ...................................... 1 2
C. Reason ................................................ 1 2
D. Description .............................................. 1 2
E. Compliance .............................................. 1 3
F . A p p r o v a l  ............................................... 1 6
G. Manpower .............................................. 1 6
H. Weight and Balance Changes .................................... 1 7
I. Electrical Load Data ......................................... 1 7
J . R e f e r e n c e s  .............................................. 1 7
1. Existing Data: ......................................... 1 7
2. Data Supplied with this Service Bulletin: ........................... 1 7
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 1 7
K. Publications Affected ........................................ 1 8
L. Interchangeability and Intermixability of Parts ........................... 1 8
M. Software Accomplishment Summary ................................ 1 8
2. MATERIAL INFORMATION ........................................ 1 9
A. Material - Price and Availability ................................... 1 9
B. Industry Support Information .................................... 1 9
C. Parts Necessary for Each Airplane ................................. 1 9
1 . K i t s / P a r t s :  ........................................... 1 9
2. Parts and Materials Supplied by the Operator: ........................ 1 9
3. Parts Modified and Reidentified: ............................... 2 2
4. Parts Removed and Not Replaced: .............................. 2 2
D. Parts Necessary to Change Spares ................................. 2 2
E. Special Tooling - Price and Availability ............................... 2 2
F. Special Tooling Necessary to do this Service Bulletin ....................... 2 2
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 3
A. GENERAL INFORMATION ..................................... 2 3
B. WORK INSTRUCTIONS ....................................... 2 5
F I G U R E  1 : [ T H I S  F I G U R E  I S  D E L E T E D ] ................................. 2 8
F I G U R E  2 : [ T H I S  F I G U R E  I S  D E L E T E D ] ................................. 2 9
FIGURE 3: WIRE ASSEMBLY - INSPECTION [Group 1, Configuration 1-2] .............. 3 0
FIGURE 4: TUBE SLEEVING INSTALLATION - MODIFICATION [Group 1, Configuration 2] ..... 3 2
FIGURE 5: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING, GROMMET
SPACER AND BRACKET - INSPECTION [Group 1, Configuration 1] ............ 3 9
FIGURE 6: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - BRACKET - TRIM AND
IDENTIFY [Group 1, Configuration 1] ............................. 4 3
FIGURE 7: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - GROMMET -
INSTALLATION [Group 1, Configuration 1] .......................... 4 6
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
3 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 4

FIGURE 8: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SPACER - INSTALLATION
[Group 1, Configuration 1] ................................... 5 0
FIGURE 9: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING AND WIRING
- ROUTING AND INSTALLATION [Group 1, Configuration 1] ................ 5 5
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
4 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 5

Commercial 
Airplanes
MD11
Service Bulletin
ALERT
Revision Transmittal SheetNumber: MD11-24A204Original Issue: July 19, 2002
Revision 2: April 14, 2021
ATA System: 2400
SUBJECT: ELECTRICAL POWER - Electrical Power, General - Install Tube Sleeving, Grommet,
and Spacer on Observer Station Upper Main Circuit Breaker Panel Wiring
This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION
The Federal Aviation Administration (FAA) will possibly release an 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 Original Issue or Revision 1 was previously done:
ActionConditionGroup
Do a General Visual Inspection of
the right observer station upper main
circuit breaker panel and wiring for
missing installation of sleeving,
grommets and spacers, and do an
inspection to determine bracket part
number and do applicable on condi-
tion actions as outlined in Group 1
Configuration 1 Work Instructions.
Airplanes that have done any work
instructions on Original Issue or Re-
vision 1 of this service bulletin.
Group 1
Do a General Visual Inspection of
wire assemblies ABS9110 and
ABS9115 for damage and do appli-
cable on condition actions as out-
lined in Group 1 Configuration 2
Work Instructions.
Airplanes that have not done any
work instructions on Original Issue
or Revision 1 of this service bulletin.
Group 1
REASON FOR REVISION
This revision is sent to give instructions to do a General Visual Inspection of the right observer station upper
main circuit breaker panel and wiring. Boeing has received reports that the changes done on the observer station
upper main circuit breaker panel may have been removed from the airplane.
These sections were changed:
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
5 of 59

### Page 6

1. Summary, ACTION, separated Group 1 Configurations and added description.
2. Summary, COMPLIANCE, changed compliance statement.
3. Summary, MANPOWER, removed manpower table and added reference statement.
4. Paragraph 1.A.1., Airplanes:
a. Added airplane applicability statement.
b. In Group Configuration Table, changed terminology of revision level.
5. Paragraph 1.C., Reason, added revision information.
6. Paragraph 1.D., Description, separated Group 1, Configurations and added descriptions, revision
information and maintenance zone table.
7. Paragraph 1.E., Compliance, changed compliance statement and added compliance tables.
8. Paragraph 1.F., Approval, changed approval statement.
9. Paragraph 1.G., Manpower, added table titles, updated task hours and added notes.
10. Paragraph 1.K.2., added Damage Tolerance Based Structural Inspection information.
11. Paragraph 1.M., Software Accomplishment Summary, added section.
12. Paragraph 2.C.2, Parts and Materials Supplied by the Operator, added statement, removed vendor
notes, and corrected part numbers.
13. Paragraph 3.A., General Information, added general notes.
14. Paragraph 3.B., Work Instructions:
a. Group 1, Configuration 1 added inspection conditions, energize power and serviceable steps.
b. Group 1, Configuration 2 added inspection conditions, energize power and serviceable steps.
15. FIGURE 1: Deleted.
16. FIGURE 2, Deleted.
17. FIGURE 3:
a. Added Group 1, Configuration 1-2 applicability.
b. Added inspection area location.
c. Notes: Added General Visual Inspection.
18. FIGURE 4:
a. Added Group 1, Configuration 2 applicability.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
6 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 7

b. Added wire assembly protection and touch up instructions.
c. Added SOPM reference.
19. Added FIGURE 5.
20. Added FIGURE 6.
21. Added FIGURE 7.
22. Added FIGURE 8.
23. Added FIGURE 9.
The data given in Information Notice MD11-24A204 IN 02 is included in this revision.
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.
Terminology has been changed in the Work Instructions to agree with the terminology defined in Paragraph
3.A., General Information - Note 14.
Pages with no vertical lines have no changes.
REVISION HISTORY
July 19, 2002Original Issue:
November 03, 2005Revision 1:
April 14, 2021Revision 2:
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
7 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 8

Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
8 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT
BLANK PAGE

### Page 9

Commercial 
Airplanes
MD11
Service Bulletin
ALERT
SummaryNumber: MD11-24A204Original Issue: July 19, 2002
Revision 2: April 14, 2021
ATA System: 2400
SUBJECT: ELECTRICAL POWER - Electrical Power, General - Install Tube Sleeving, Grommet,
and Spacer on Observer Station Upper Main Circuit Breaker Panel Wiring
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN
PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT
TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE
NEW OWNER.
CONCURRENT REQUIREMENTS
None.
BACKGROUND
Two operators have reported incidents of wires chafing against inboard upper corner of the observer station
circuit breaker panel. It has been determined that this condition allows for the chafed electrical wires to arc
against the metal panel during the opening and closing of the panel. If not corrected, wire chafing and arcing
on the panel could cause damage to equipment and/or loss of electrical power. Repairing electrical wires, if
required and revising/rerouting wire assemblies for clearance will minimize the possibility of wires chafing/arcing
against the observer station circuit breaker panel during opening and closing.
ACTION
In the observer station upper main circuit breaker panel:
Group 1, Configuration 1:
1. Do a General Visual Inspection of the right observer station upper main circuit breaker panel and wiring
for missing installation of sleeving, grommets and spacers, and do an inspection to determine bracket
part number and do applicable on condition actions..
Group 1, Configuration 2:
1. Do a General Visual Inspection of wire assemblies ABS9110 and ABS9115 for damage and do applicable
on condition actions.
EFFECTIVITY
All MD-11 and MD-11F airplanes. Refer to Paragraph 1.A.1 for detailed effectivity.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
9 of 59

### Page 10

COMPLIANCE
The Federal Aviation Administration (FAA) will possibly release an 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 available for MD-11 airplanes in warranty as of October 1, 2000. Please refer to
Paragraph 2.B., Industry Support Information.
MANPOWER
Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION
Operator Supplied Parts/Materials.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
10 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 11

Commercial 
Airplanes
MD11
Service Bulletin
ALERT
Number: MD11-24A204
Original Issue: July 19, 2002
Revision 2: April 14, 2021
ATA System: 2400
SUBJECT: ELECTRICAL POWER - Electrical Power, General - Install Tube Sleeving, Grommet,
and Spacer on Observer Station Upper Main Circuit Breaker Panel Wiring
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN
PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT
TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE
NEW OWNER.
1.    PLANNING INFORMATION
A. Effectivity
1. Airplanes
This bulletin is applicable to MD-11, MD-11F Airplane(s), line number(s) 447-449, 451-464, 466-489,
491-517, 519-552, 554-646 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.
This service bulletin is for the airplanes shown below:
DESCRIPTIONCONFIGURATIONGROUP
MD-11 and MD-11F Airplanes.-1
Airplanes that have done Original Issue or Revision 1 of this service
bulletin.
1
Airplanes that have not done Original Issue and Revision 1 of this
service bulletin.
2
Airplane Models:
MD-11, MD-11F
GroupFuselage Number
1447 - 449
1451 - 464
GroupFuselage Number
1466 - 489
1491 - 517
GroupFuselage Number
1519 - 552
1554 - 646
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
11 of 59

### Page 12

2. Spares Affected
None.
B. Concurrent Requirements
None.
C. Reason
Two operators have reported incidents of wires chafing against inboard upper corner of the observer
station circuit breaker panel. It has been determined that this condition allows for the chafed electrical
wires to arc against the metal panel during the opening and closing of the panel. If not corrected, wire
chafing and arcing on the panel could cause damage to equipment and/or loss of electrical power.
Repairing electrical wires, if required and revising/rerouting wire assemblies for clearance will minimize
the possibility of wires chafing/arcing against the observer station circuit breaker panel during opening
and closing.
Revision 1: Sent to provide additional instructions to trim the observer station upper main circuit breaker
panel for more clearance and stress relief when panel is open. The data given in Information Notice
MD11-24A204 IN 01, dated August 9, 2002 is included in this revision.
Revision 2: Sent to give instructions to do a General Visual Inspection of the right observer station
upper main circuit breaker panel and wiring. Boeing has received reports that the changes done on
the observer station upper main circuit breaker panel may have been removed from the airplane.
The data given in Information Notice MD11-24A204 IN 02 is included in this revision.
D. Description
In the observer station upper main circuit breaker panel:
Group 1, Configuration 1:
1. Do a General Visual Inspection of the right observer station upper main circuit breaker panel and
wiring for missing installation of sleeving, grommets and spacers, and do an inspection to determine
bracket part number and do applicable on condition actions..
Group 1, Configuration 2:
1. Do a General Visual Inspection of wire assemblies ABS9110 and ABS9115 for damage and do
applicable on condition actions.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
12 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 13

Effects of this Revision on airplanes on which Original Issue or Revision 1 was previously done:
ActionConditionGroup
Do a General Visual Inspection of the right
observer station upper main circuit breaker
panel and wiring for missing installation of
sleeving, grommets and spacers, and do an
inspection to determine bracket part number
and do applicable on condition actions as
outlined in Group 1 Configuration 1 Work In-
structions.
Airplanes that have done any
work instructions on Original Is-
sue or Revision 1 of this service
bulletin.
Group 1
Do a General Visual Inspection of wire assem-
blies ABS9110 and ABS9115 for damage and
do applicable on condition actions as outlined
in Group 1 Configuration 2 Work Instructions.
Airplanes that have not done
any work instructions on Origi-
nal Issue or Revision 1 of this
service bulletin.
Group 1
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones
ZoneModel
211MD-11, MD-11F
E. Compliance
The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to
this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this
service bulletin mandatory.
Accomplish the required actions in accordance with Accomplishment Instructions.
When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When
more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for
that CONDITION or OPTION.
Group 1, Configuration 1:
Table 1: Inspect the Observer Station Upper Main Circuit Breaker Panel for Missing Sleeving,
Grommet, Spacer and Determine Bracket Number
Repeat Interval
(Not to Exceed)
Compliance TimeActionCondition
-Within 8340 flight
hours or within 30
months after the
Revision 2 date of
this service bul-
letin, whichever
occurs first.
Do a General Visual In-
spection of the right ob-
server station upper main
circuit breaker panel for
any missing installation of
sleeving.
All Airplanes
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
13 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 14

Group 1, Configuration 1:
Table 1: Inspect the Observer Station Upper Main Circuit Breaker Panel for Missing Sleeving,
Grommet, Spacer and Determine Bracket Number
Repeat Interval
(Not to Exceed)
Compliance TimeActionCondition
--No further action is re-
quired.
CONDITION 1: SLEEVING
INSTALLED
-Before further flightDo a General Visual In-
spection of wire assem-
blies ABS9110 and
ABS9115 for damage.
CONDITION 2: ANY
SLEEVING NOT IN-
STALLED
-Before further flightInstall sleeve(s) and route
wires.
CONDITION 2.1: NO WIRE
DAMAGE FOUND
-Before further flightCONDITION 2.2 (AC-
TION 1): Repair or re-
place damaged wire(s).
CONDITION 2.2: ANY
WIRE DAMAGE FOUND
-CONDITION 2.2 (AC-
TION 2): Install sleeve(s)
and route wire(s).
-Within 8340 flight
hours or within 30
months after the
Revision 2 date of
this service bul-
letin, whichever
occurs first.
Do inspection of the right
observer station upper
main circuit breaker panel
to determine if the brack-
et part number is
SR11240046-11.
All Airplanes
--No further action is re-
quired.
CONDITION 3: BRACKET
PART NUMBER IS
SR11240046-11
-Before further flightCONDITION 4 (ACTION
1): Trim bracket and
identify as SR11240046-
11.
CONDITION 4: BRACKET
PART NUMBER IS NOT
SR11240046-11
-CONDITION 4 (ACTION
2): Install grommet on
bracket.
-Within 8340 flight
hours or within 30
months after the
Revision 2 date of
this service bul-
letin, whichever
occurs first.
Do a General Visual In-
spection of the right ob-
server station upper main
circuit breaker panel for
missing installation of
grommets and spacers.
All Airplanes
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
14 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 15

Group 1, Configuration 1:
Table 1: Inspect the Observer Station Upper Main Circuit Breaker Panel for Missing Sleeving,
Grommet, Spacer and Determine Bracket Number
Repeat Interval
(Not to Exceed)
Compliance TimeActionCondition
--No further action is re-
quired.
CONDITION 5: GROM-
METS AND SPACERS
ARE INSTALLED
-Before further
flight.
Install any grommet(s).CONDITION 6: ANY
GROMMET(S) NOT IN-
STALLED
-Before further
flight.
Install any spacer(s).CONDITION 7: ANY
SPACER(S) NOT IN-
STALLED
Group 1, Configuration 2:
Table 1: Inspect the Observer Station Upper Main Circuit Breaker Panel for Wire Damage
Repeat Interval
(Not to Exceed)
Compliance TimeActionCondition
-Within 8340 flight
hours or within 30
months after the
Revision 2 date of
this service bul-
letin, whichever
occurs first.
Do a General Visual In-
spection of wire assem-
blies ABS9110 and
ABS9115 for damage.
All Airplanes
-Before further
flight.
Do the changes in the
right observer station up-
per main circuit breaker
panel.
CONDITION 1: NO WIRE
DAMAGE FOUND
-Before further
flight.
CONDITION 2 (ACTION
1): Repair or replace the
damaged wires.
CONDITION 2: ANY WIRE
DAMAGE FOUND
-CONDITION 2 (ACTION
2): Do the changes in the
right observer station up-
per main circuit breaker
panel.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
15 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 16

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.
G. Manpower
The table below shows an estimate of the task hours necessary to do this inspection/repair/modification
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 examine the work
— Time to cure the materials
— Time to make the parts
— Time to find the tools.
Group 1, Configuration 1:
Table 1: Inspect the Observer Station Upper Main Circuit Breaker Panel for Missing Sleeving, Grommet,
Spacer and Determine Bracket Number
NotesElapsed HoursTask HoursNumber of PersonsTask
0.30.31Gain Access
(a)4.08.02Remove Lavatory or Galley
(b)1.11.11Inspect
(a)(c)1.32.62Change
(a)4.08.02Install Lavatory or Galley
0.30.31Close-up
1120.3Total for Each Airplane
(a) Only if necessary.
(b) This is the total time for all inspections.
(c) This is the total time for all changes.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
16 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 17

Group 1, Configuration 2:
Table 2: Inspect the Observer Station Upper Main Circuit Breaker Panel for Wire Damage
Elapsed HoursTask HoursNumber of PersonsTask
0.30.31Gain Access
4.08.02Remove Lavatory or Galley
0.70.71Inspect
1.12.22Change
4.08.02Install Lavatory or Galley
0.30.31Close-up
10.419.5Total for Each Airplane
H. Weight and Balance Changes
None.
I. Electrical Load Data
Not changed.
J. References
1. Existing Data:
a. Standard Overhaul Practices Manual (SOPM) 20-00-00
b. Standard Wiring Practices Manual (SWPM) 20-10-01, 20-10-02, 20-10-09
c. MD-11 Aircraft Maintenance Manual (AMM) 06-22-00, 24-40-00, 24-41-00, 24-42-00, 25-31-00,
25-41-00
d. MD-11 Structural Repair Manual (SRM) 51-21-01
2. Data Supplied with this Service Bulletin:
None.
3. Installation Drawings Used in the Preparation of this Service Bulletin:
ChangeTitleDrawing Number
BNWire Installation, Main Observer StationABP7643
EWire Installation, Upper Main Circuit Breaker PanelSR11240046
These drawings were used to prepare this service bulletin. These drawings are not necessary to
make the specified changes, and are not supplied with this service bulletin. These drawings may
not be applicable to all airplane configurations or operators.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
17 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 18

K. Publications Affected
1. Publications:
Chapter-SectionPublication
25-12Illustrated Parts Catalog
2. Damage Tolerance Based Structural Inspections:
Boeing has evaluated the repairs 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.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
18 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 19

2.    MATERIAL INFORMATION
A. Material - Price and Availability
The operator can supply the parts and materials shown in Paragraph 2.C., Parts Necessary for Each
Airplane. As an alternative, operators can purchase the parts from Boeing Spares or supplier. This
service bulletin does not show the Boeing price.
B. Industry Support Information
Boeing warranty remedies are available for MD-11 airplanes in warranty as of October 1, 2000. For
inspection labor task hour reimbursement for airplanes in warranty as of that date, send a warranty
claim to BCA Contracts - Warranty. If the condition described in this service bulletin is found during the
inspection for airplanes in warranty as of that date and additional task hours are required, send a
warranty claim to BCA Contracts - Warranty. The warranty remedies will expire eight years from the
original release date of this service bulletin.
Boeing Commercial Airplanes Group - Warranties, P.O. Box 3707, MC 2L-46, Seattle, Washington
98124-2207 USA, (Service Bulletin MD-11-24A204).
C. Parts Necessary for Each Airplane
1. Kits/Parts:
None.
2. Parts and Materials Supplied by the Operator:
The following parts or materials are necessary to do the change in this service bulletin. Parts and
materials in the manuals given in Paragraph 1.J., References, can also be necessary. Examine
operator part and material supply to make sure all necessary parts and materials are available.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
19 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 20

Group 1, Configuration 1:
Table 1: Inspect the Observer Station Upper Main Circuit Breaker Panel for Missing Sleeving,
Grommet, Spacer and Determine Bracket Number
NotesNameQTYPart Number /
Specification
(a)Washer1MS35338-42
Screw13D0005-08-8
Washer1NAS1252-8L
Grommet36 In.MS21266-1N
Strap69D0254-1-2-9
Spacer12712453-BN
Tube Sleeving36 In.SR11240046-7
Sleeving, Glass
Fiber Braid Sili-
cone Elastomer
Coated; ES4400
R-A-1 2.00 ID X 36
Inches (DMS2109-
1) or equivalent
Tube Sleeving36 In.SR11240046-9
Sleeving, Glass
Fiber Braid Sili-
cone Elastomer
Coated; ES4400
R-A-1 1.00 ID X 36
Inches (DMS2109-
1) or equivalent
AdhesiveAs Re-
quired.
Adhesive, Ure-
thane, Temp Re-
sist; Uralane 5772
A/B Kit (DPM
6087) or equivalent
Tie TapeAs Re-
quired.
Tape, Lacing and
Tying, DPM 731-6
(a) Maybe purchased from:
1. Order on-line via ATA Spec 2000 or Boeing PART Page.
2. FAX to (206) 662-7145.
3. Spares Customer Support - MC 36-65, Boeing Spares Department, P.O. Box 3707,
Seattle, Washington 98124-2207 USA, (Service Bulletin MD11-24A204).
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
20 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 21

Group 1, Configuration 2:
Table 2: Inspect the Observer Station Upper Main Circuit Breaker Panel for Wire Damage
NotesNameQTYPart Number /
Specification
(a)Screw13D0005-08-12
Washer2NAS1252-8L
Nut1MS21042L08
Grommet36 In.MS21266-1N
Strap69D0254-1-2-9
Spacer12712453-BN
Spacer1NAS43DD3-16FC
Tube Sleeving36 In.SR11240046-7
Sleeving, Glass
Fiber Braid Sili-
cone Elastomer
Coated; ES4400
R-A-1 2.00 ID X 36
Inches (DMS2109-
1) or equivalent
Tube Sleeving36 In.SR11240046-9
Sleeving, Glass
Fiber Braid Sili-
cone Elastomer
Coated; ES4400
R-A-1 1.00 ID X 36
Inches (DMS2109-
1) or equivalent
AdhesiveAs Re-
quired.
Adhesive, Ure-
thane, Temp Re-
sist; Uralane 5772
A/B Kit (DPM
6087) or equivalent
Tie TapeAs Re-
quired.
Tape, Lacing and
Tying, DPM 731-6
(a) Maybe purchased from:
1. Order on-line via ATA Spec 2000 or Boeing PART Page.
2. FAX to (206) 662-7145.
3. Spares Customer Support - MC 36-65, Boeing Spares Department, P.O. Box 3707,
Seattle, Washington 98124-2207 USA, (Service Bulletin MD11-24A204).
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
21 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 22

3. Parts Modified and Reidentified:
The part shown below is changed as shown in this service bulletin. The quantity (QTY) is the
number of part changed on each airplane.
New Part NumberNameQTYExisting Part Number
SR11240046-11Bracket1ABN7013-169
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.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
22 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 23

3.    ACCOMPLISHMENT INSTRUCTIONS
A. GENERAL INFORMATION
IF ELECTRICAL POWER IS APPLIED TO THE AIRPLANE, MAKE SURE YOU
OBEY ALL PRECAUTIONS WHILE YOU DO WORK. IF YOU DO NOT OBEY THE
PRECAUTIONS, DEATH OR INJURY TO PERSONS, AND DAMAGE TO THE
AIRPLANE CAN OCCUR.WARNING
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
ELECTRICALLY GROUND THE AIRPLANE. THIS WILL HELP TO PREVENT
DAMAGE TO THE AIRPLANE OR EQUIPMENT.CAUTION
NOTE: 1. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for
definition of the acronyms.
2. For approved fastener and process material substitutions, refer to MD-11 SRM 51.
3. If the length of fasteners specified in this service bulletin do not meet the installation
standards, fasteners of the same specification, or an approved substitute, one grip
length longer or shorter may be used.
4. A 1/8-inch thick stack of the same type washers called for in this service bulletin is
the maximum thickness which may be used under fastener head or nut to counteract
accumulation of tolerances.
EXCEPTION: When the available fastener length increments are greater than
1/16-inch, a 3/16-inch thick stack of the same type washers may be used.
5. Torque limits to tighten nuts and bolts are given in MD-11 SRM 51.
6. Refer to the Standard Wiring Practices Manual SWPM 20-10-01 for the wire
installation procedures.
7. Obey all of the warnings and cautions given in the specified manual sections.
8. Linear dimensions are in inches.
9. Maintenance personnel should take adequate precautionary measures to ensure
that system components, airplane electrical wiring and panel structures, are not
damaged by drills, metal shavings, and other debris during incorporation of this
service bulletin. Metal shavings and/or debris left in the airplane that can contact
wire bundles, can result in arcing.
10. Use caution not to affect any termination points of the existing wiring.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
23 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 24

11. Install clamps to insure a friction fit on wire bundles to prevent movement within the
clamp when moderate pressure is applied. It is permissible to select smaller or larger
sizes in that type clamp to meet this requirement. Refer to SWPM 20-00-06.
12. A General Visual Inspection is defined as: A visual examination of an interior or
exterior area, installation or assembly to detect obvious damage, failure or irregularity.
A mirror may be necessary to ensure visual access to all surfaces in the inspection
area. This level of inspection is made under normal available lighting conditions such
as daylight, hangar lighting, flashlight or drop-light and may require removal or opening
of access panels or doors. Stands, ladders or platforms may be required to gain
proximity to the area being checked.
13. Equivalent parts are listed in the AEPL, Drawing 7595071.
14. 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.
15. 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.
16. 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.
17. 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.
18. The compliance times for the actions in Paragraph 3.B., WORK INSTRUCTIONS
are in Paragraph 1.E., Compliance
19. Some steps in the Work Instructions are labeled as Required for Compliance (RC).
If this service bulletin is mandated by an Airworthiness Directive (AD), then the steps
labeled as RC, including sub-steps under an RC step and any figures identified in
an RC step, must be done to comply with the AD. If a step or sub-step is labeled
"RC Exempt," then the RC requirement is removed from that step or sub-step. An
Alternative Method of Compliance (AMOC) is required for any deviations to RC steps,
including sub-steps and identified figures. Steps not labeled as RC 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 RC steps, including sub-steps and identified figures, can still be done as specified,
and the airplane can be put back in an airworthy condition.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
24 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 25

B. WORK INSTRUCTIONS
Group 1, Configuration 1:
Inspect the Observer Station Upper Main Circuit Breaker Panel for Missing Sleeving, Grommet,
Spacer and Determine Bracket Number
1. Remove electrical power from the airplane. Refer to MD-11 AMM 24-40-00 as an accepted
procedure.
2. Open the observer station upper main circuit breaker panel at the right side near Station Y=392.000.
Refer to MD-11 AMM 06-22-00.
3. RC - Do a General Visual Inspection of the right observer station upper main circuit breaker panel
for any missing installation of sleeving in accordance with FIGURE 5.
a. CONDITION 1: SLEEVING INSTALLED
(1) No further action is required.
b. CONDITION 2: ANY SLEEVING NOT INSTALLED
(1) Do a General Visual Inspection of wire assemblies ABS9110 and ABS9115 for damage
in accordance with FIGURE 3.
(a) CONDITION 2.1: NO WIRE DAMAGE FOUND
1) Install sleeve(s) and route wires in accordance with FIGURE 9.
(b) CONDITION 2.2: ANY WIRE DAMAGE FOUND
1) Repair or replace damaged wire(s). Refer to SWPM 20-10-01, SWPM 20-10-02
and SWPM 20-10-09 as accepted procedures.
2) Install sleeve(s) and route wire(s) in accordance with FIGURE 9.
4. RC - Do inspection of the right observer station upper main circuit breaker panel to determine if
the bracket part number is SR11240046-11 in accordance with FIGURE 5.
a. CONDITION 3: BRACKET PART NUMBER IS SR11240046-11
(1) No further action is required.
b. CONDITION 4: BRACKET PART NUMBER IS NOT SR11240046-11
(1) Trim bracket and identify as SR11240046-11 in accordance with FIGURE 6.
(2) Install grommet on bracket in accordance with FIGURE 7.
5. RC - Do a General Visual Inspection of the right observer station upper main circuit breaker panel
for missing installation of grommets and spacers in accordance with FIGURE 5.
a. CONDITION 5: GROMMETS AND SPACERS ARE INSTALLED
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
25 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 26

(1) No further action is required.
b. CONDITION 6: ANY GROMMET(S) NOT INSTALLED
(1) Install any grommet in accordance with FIGURE 7.
c. CONDITION 7 ANY SPACER(S) NOT INSTALLED
(1) Install any spacer in accordance with FIGURE 8.
6. Remove and keep lavatory or galley located near Station Y=392.000. Refer to MD-11 AMM 25-41-00
and MD-11 AMM 25-31-00 as accepted procedures.
7. Install kept lavatory or galley. Refer to MD-11 AMM 25-41-00 and MD-11 AMM 25-31-00 as
accepted procedures.
8. Energize aircraft electrical power system. Refer to MD-11 AMM 24-40-00 as an accepted procedure.
9. Do a return-to-service test on system(s) affected by repaired/replaced damaged wires. Refer to
MD-11 AMM 24-41-00 for Maintenance External Power and MD-11 AMM 24-42-00 for Galley
External Power as accepted procedures.
10. Close circuit breaker panel. Refer to MD-11 AMM 06-22-00 as an accepted procedure.
11. Put the airplane back to a serviceable condition.
Group 1, Configuration 2:
Inspect the Observer Station Upper Main Circuit Breaker Panel for Wire Damage
1. Remove electrical power from the airplane. Refer to MD-11 AMM 24-40-00 as an accepted
procedure.
2. Open the observer station upper main circuit breaker panel at the right side near Station Y=392.000.
Refer to MD-11 AMM 06-22-00 as an accepted procedure.
3. RC - Do a General Visual Inspection of wire assemblies ABS9110 and ABS9115 for damage in
accordance with FIGURE 3.
a. CONDITION 1: NO WIRE DAMAGE FOUND
(1) Do the changes in the observer station upper main circuit breaker panel in accordance
with FIGURE 4.
b. CONDITION 2: ANY WIRE DAMAGE FOUND
(1) Repair or replace damaged wire(s). Refer to SWPM 20-10-01, SWPM 20-10-02 and
SWPM 20-10-09 as accepted procedures.
(2) Do the changes in the observer station upper main circuit breaker panel in accordance
with FIGURE 4.
4. Remove and keep lavatory or galley located near Station Y=392.000. Refer to MD-11 AMM 25-41-00
and MD-11 AMM 25-31-00 as accepted procedures.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
26 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 27

5. Install kept lavatory or galley. Refer to MD-11 AMM 25-41-00 and MD-11 AMM 25-31-00 as
accepted procedures.
6. Energize aircraft electrical power system. Refer to MD-11 AMM 24-40-00 as an accepted procedure.
7. Do a return-to-service test on system(s) affected by repaired/replaced damaged wires. Refer to
MD-11 AMM 24-41-00 for Maintenance External Power and MD-11 AMM 24-42-00 for Galley
External Power as accepted procedures.
8. Close circuit breaker panel. Refer to MD-11 AMM 06-22-00 as an accepted procedure.
9. Put the airplane back to a serviceable condition.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2: April 14, 2021
27 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 28

FIGURE 1: [THIS FIGURE IS DELETED]
(SHEET 1 OF 1)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
28 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 29

FIGURE 2: [THIS FIGURE IS DELETED]
(SHEET 1 OF 1)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
29 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 30 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
This Figure applies only to: Group 1, Configuration 1-2.
LAVATORY OR
GALLEY
STA
STA  Y=392.000
Y=347.000
RIGHT OBSERVER STATION
SEE
INBD FWD  A-A
UPPER MAIN CIRCUIT BREAKER
PANEL RIGHT SIDE
2955006
FIGURE 3: WIRE ASSEMBLY - INSPECTION
(SHEET 1 OF 2)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  PROPRIETARY - Copyright © Unpublished  MD11-24A204
Work - See page 1 for details.  30 of 59

### Page 31

The step number shown below agrees with the number shown in the circle symbol in the figure. The QTY number
shown below is the number of the part necessary for one airplane.
NOTESQTYPART NUMBERNAMETASKSTEP
Do a General Visual Inspection of wire as-
semblies ABS9110 and ABS9115 for
damage.
1ABS9110Wire AssemblyInspect1
1ABS9115Wire Assembly
FIGURE 3: WIRE ASSEMBLY - INSPECTION
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
31 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 32 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
This Figure applies only to: Group 1, Configuration 2.
LAVATORY OR
GALLEY
STA
STA  Y=392.000
Y=347.000
RIGHT OBSERVER STATION
SEE B
SEE
INBD  → FWD
A-A
UPPER MAIN CIRCUIT BREAKER
PANEL RIGHT SIDE  2955008
FIGURE 4: TUBE SLEEVING INSTALLATION - MODIFICATION
(SHEET 1 OF 7)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  PROPRIETARY - Copyright © Unpublished  MD11-24A204
Work - See page 1 for details.  32 of 59

### Page 33 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
ABS9110
WIRE ASSY
(REF)
ABS9115
WIRE ASSY
(REF)
Hotelalas
SEE D
BEFORE MODIFICATION
0.15/0.09
6.87/6.63
TRIM
• 1.00 R
2955012
FIGURE 4: TUBE SLEEVING INSTALLATION - MODIFICATION
(SHEET 2 OF 7)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  33 of 59

### Page 34 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
SEE F
BEFORE MODIFICATION
WIRE ASSY
2955020
FIGURE 4: TUBE SLEEVING INSTALLATION - MODIFICATION
(SHEET 3 OF 7)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  34 of 59

### Page 35 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
SEE F
ABS9110
WIRE ASSY
ABS9115
WIRE ASSY
SEE G
AFTER MODIFICATION
CLAMP
WASHER
SCREW
• STA-STRAP
ABS9115
WIRE ASSY
(REF)
2955021
FIGURE 4: TUBE SLEEVING INSTALLATION - MODIFICATION
(SHEET 4 OF 7)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
Work - See page 1 for details.  35 of 59

### Page 36 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
SEE H
AFTER MODIFICATION
NUT
WASHER
SPACER
CLAMP
STA-STR AP
WASHER
SCREW /
ABS9110
WIRE ASSY  (REF)  2955023
FIGURE 4: TUBE SLEEVING INSTALLATION - MODIFICATION
(SHEET 5 OF 7)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  36 of 59

### 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 per airplane.
NOTESQTYPART NUMBERNAMETASKSTEP
-13D0005-08-9ScrewRemove1
2NAS1252-8LWasher
1MS21042L08Nut
1NMC1001-3Clamp
1NMC1001-6Clamp
13D0005-08-9ScrewRemove/Keep2
2NAS1252-8LWasher
1MS21042L08Nut
1NMC1001-1Clamp
1NMC1001-5Clamp
13D0005-08-10ScrewRemove/Keep3
1NAS1252-8LWasher
1NMC1001-6Clamp
13D0005-08-14ScrewRemove/Keep4
1NAS1252-8LWasher
1NMC1001-2Clamp
1NMC1001-2Clamp
2ES4400R-A-1SleevingRemove5
Protect wire assemblies as neces-
sary and trim bracket as shown.
Touch up bracket. Refer to MD-11
SRM 51-21-01 as an accepted
procedure.
1ABN7013-169BracketTrim6
Identify bracket as SR11240046-
11. Refer to SOPM 20-00-00 as an
accepted procedure.
1SR11240046-11BracketIdentify7
-13D0005-08-7ScrewRemove8
2NAS1252-8LWasher
1MS21042L08Nut
1NMC1001-6ClampRemove/Keep
FIGURE 4: TUBE SLEEVING INSTALLATION - MODIFICATION
(SHEET 6 OF 7)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
37 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 38

NOTESQTYPART NUMBERNAMETASKSTEP
Cut to fit and install grommet three
places using Urethane Adhesive
DPM 6087. Refer to MD-11 SWPM
20-10-09 as an accepted proce-
dure.
36 In.MS21266-1NGrommetInstall (New)9
Slit/locate and install sleeving. Re-
fer to MD-11 SWPM 20-10-01
(DMS2109-1) as an accepted pro-
cedure.
1SR11240046-7SleevingInstall (New)10
1SR11240046-9SleevingInstall (New)11
-1NMC1001-2ClampInstall/Kept12
1NMC1001-6Clamp
2NAS1252-8LWasher
13D0005-08-9Screw
1MS21042L08Nut
29D0254-1-2-9StrapInstall (New)
12712453-BNSpacerInstall (New)13
19D0254-1-2-9Strap
1NMC1001-6ClampInstall/Kept14
1NAS1252-8LWasher
13D0005-08-10Screw
19D0254-1-2-9StrapInstall (New)
2NMC1001-2ClampInstall/Kept15
1NAS1252-8LWasher
13D0005-08-14Screw
29D0254-1-2-9StrapInstall (New)
1NAS43DD3-16FCSpacerInstall (New)16
2NAS1252-8LWasher
13D0005-08-12Screw
1MS21042L08Nut
19D0254-1-2-9Strap
1NMC1001-6ClampInstall/Kept
FIGURE 4: TUBE SLEEVING INSTALLATION - MODIFICATION
(SHEET 7 OF 7)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
38 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 39 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
_ This Figure applies only to: Group 1, Configuration 1.
LAVATORY OR
GALLEY
STA
STA  Y=392.000
0002=X
RIGHT OBSERVER STATION
SEE A
SEE
INBD ‹  → FWD  A-A
UPPER MAIN CIRCUIT BREAKER
PANEL RIGHT SIDE
FIGURE 5: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING, GROMMET
SPACER AND BRACKET - INSPECTION
(SHEET 1 OF 4)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  39 of 59

### Page 40 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
ABS9110
WIRE ASSY
ABS9115
WIRE ASSY
SEE
2955030
FIGURE 5: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING, GROMMET
SPACER AND BRACKET - INSPECTION
(SHEET 2 OF 4)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  PROPRIETARY - Copyright © Unpublished  MD11-24A204
Work - See page 1 for details.  40 of 59

### Page 41 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
SEE
ABS9110
WIRE ASSY
(REF)
FIGURE 5: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING, GROMMET
SPACER AND BRACKET - INSPECTION
(SHEET 3 OF 4)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  41 of 59

### Page 42

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 per airplane.
More DataQtyIdentificationNameTaskStep
(a)3MS21266-1NGrommetInspect1
Wire assembly
ABS9115. (b)
1SR11240046-7SleevingInspect2
Wire assembly
ABS9110. (b)
1SR11240046-9SleevingInspect3
(c)12712453-BNSpacerInspect4
(c)1NAS43DD3-16FCSpacerInspect5
(d)1SR11240046-11BracketInspect6
(a) Do a General Visual Inspection for any missing installation of any grommet.
(b) Do a General Visual Inspection for any missing installation of sleeving on the wire assembly(s).
(c) Do a General Visual Inspection for any missing installation of a spacer.
(d) Do an inspection to determine if the bracket part number is SR11240046-11.
FIGURE 5: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING, GROMMET
SPACER AND BRACKET - INSPECTION
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
42 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 43 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
This Figure applies only to: Group 1, Configuration 1.
LAVATORY OR
GALLEY
STA
STA  Y=392.000
0002=X
RIGHT OBSERVER STATION
SEE A
INBD  > FWD
A-A
UPPER MAIN CIRCUIT BREAKER
PANEL RIGHT SIDE  2964403
FIGURE 6: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - BRACKET - TRIM AND
IDENTIFY
(SHEET 1 OF 3)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  43 of 59

### Page 44 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
ABS9110
WIRE ASSEMBLY
ABS9115
WIRE ASSEMBLY
SEE ®
- 0.15/0.09
6.87/6.63
TRIM
1.00 R
2964405
FIGURE 6: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - BRACKET - TRIM AND
IDENTIFY
(SHEET 2 OF 3)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
Work - See page 1 for details.  44 of 59

### Page 45

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary per airplane.
NOTESQTYPART NUMBERNAMETASKSTEP
Protect wire assemblies as neces-
sary and trim bracket as shown.
Touch up bracket. Refer to MD-11
SRM 51-21-01 as an accepted
procedure.
1ABN7013-169BracketTrim1
Identify bracket as SR11240046-
11. Refer to SOPM 20-00-00 as an
accepted procedure.
1SR11240046-11BracketIdentify2
FIGURE 6: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - BRACKET - TRIM AND
IDENTIFY
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
45 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 46 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
This Figure applies only to: Group 1, Configuration 1.
LAVATORY OR
GALLEY
STA
STA  Y=392.000
Y=347.000
RIGHT OBSERVER STATION
SEE
SEE
INBD <  → FWD
A-A
UPPER MAIN CIRCUIT BREAKER
PANEL RIGHT SIDE  2964411
I FIGURE 7: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - GROMMET - INSTALLATION
(SHEET 1 OF 4)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  PROPRIETARY - Copyright © Unpublished  MD11-24A204
Work - See page 1 for details.  46 of 59

### Page 47 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
ABS9110
WIRE ASSY
ABS9115
WIRE ASSY
LOT
SEE (
AFTER MODIFICATION
0964412
• FIGURE 7: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - GROMMET - INSTALLATION
(SHEET 2 OF 4)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  47 of 59

### Page 48 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
SEE D
AFTER MODIFICATION
2964419
FIGURE 7: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - GROMMET - INSTALLATION
(SHEET 3 OF 4)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  48 of 59

### Page 49

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary per airplane.
NOTESQTYPART NUMBERNAMETASKSTEP
Cut to fit and install grommet using
Urethane Adhesive DPM 6087.
Refer to MD-11 SWPM 20-10-09
as an accepted procedure.
-MS21266-1NGrommetInstall (New)1
FIGURE 7: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - GROMMET - INSTALLATION
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
49 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 50 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
This Figure applies only to: Group 1, Configuration 1.
LAVATORY OR
GALLEY
STA
STA  Y=392.000
Y=347.000
RIGHT OBSERVER STATION
SEE ( C
SEE
SEE
INBD <  → FWD
A-A
UPPER MAIN CIRCUIT BREAKER
PANEL RIGHT SIDE  2964398
I FIGURE 8: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SPACER - INSTALLATION
(SHEET 1 OF 5)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  PROPRIETARY - Copyright © Unpublished  MD11-24A204
Work - See page 1 for details.  50 of 59

### Page 51 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
SEE ®
BEFORE MODIFICATION
WIRE ASSY
2964995
FIGURE 8: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SPACER - INSTALLATION
(SHEET 2 OF 5)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
Work - See page 1 for details.  51 of 59

### Page 52 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
ABS9110
WIRE ASSY
ABS9115
WIRE ASSY
SEE  D
AFTER MODIFICATION
2964396
I FIGURE 8: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SPACER - INSTALLATION
(SHEET 3 OF 5)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  52 of 59

### Page 53 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
SEE (F
AFTER MODIFICATION
_ NUT
WASHER
SPACER
CLAMP
STA-STR AP
WASHER
SCREW /
ABS9110
WIRE ASSEMBLY  2964400
FIGURE 8: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SPACER - INSTALLATION
(SHEET 4 OF 5)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
Work - See page 1 for details.  53 of 59

### Page 54

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary per airplane.
NOTESQTYPART NUMBERNAMETASKSTEP
-13D0005-08-7ScrewRemove1
2NAS1252-8LWasher
1MS21042L08Nut
1NMC1001-6ClampRemove/Keep
12712453-BNSpacerInstall (New)2
19D0254-1-2-9Strap
1NAS43DD3-16FCSpacerInstall (New)3
2NAS1252-8LWasher
13D0005-08-12Screw
1MS21042L08Nut
19D0254-1-2-9Strap
1NMC1001-6ClampInstall/Kept
FIGURE 8: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SPACER - INSTALLATION
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
54 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 55 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
This Figure applies only to: Group 1, Configuration 1.
LAVATORY OR
GALLEY
STA
STA  Y=392.000
Y=347.000
RIGHT OBSERVER STATION
SEE A
SEE
INBD  > FWD
A-A
UPPER MAIN CIRCUIT BREAKER
PANEL RIGHT SIDE  2964424
FIGURE 9: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING AND WIRING -
ROUTING AND INSTALLATION
(SHEET 1 OF 5)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  55 of 59

### Page 56

FIGURE 9: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING AND WIRING -
ROUTING AND INSTALLATION
(SHEET 2 OF 5)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
56 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 57 (OCR)

BOEING SERVICE BULLETIN MD11-24A204
ALERT  ALERT
SEE C
ABS9110
WIRE ASSEMBLY.
ABS9115
WIRE ASSEMBLY
SEE
AFTER MODIFICATION
CLAMP
WASHER
SCREW
STA-STRAP
ABS9115
WIRE ASSEMBLY
0964427
FIGURE 9: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING AND WIRING -
ROUTING AND INSTALLATION
(SHEET 3 OF 5)
Original Issue: July 19, 2002
Revision 2 April 14, 2021  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  MD11-24A204
Work - See page 1 for details.  57 of 59

### Page 58

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 per airplane.
NOTESQTYPART NUMBERNAMETASKSTEP
-13D0005-08-9ScrewRemove1
2NAS1252-8LWasher
1MS21042L08Nut
1NMC1001-3Clamp
1NMC1001-6Clamp
13D0005-08-9ScrewRemove/Keep2
2NAS1252-8LWasher
1MS21042L08Nut
1NMC1001-1Clamp
1NMC1001-5Clamp
13D0005-08-10ScrewRemove/Keep3
1NAS1252-8LWasher
1NMC1001-6Clamp
13D0005-08-14ScrewRemove/Keep4
1NAS1252-8LWasher
1NMC1001-2Clamp
1NMC1001-2Clamp
2ES4400R-A-1SleevingRemove5
Slit/locate and install sleeving. Re-
fer to MD-11 SWPM 20-10-01
(DMS2109-1) as an accepted pro-
cedure.
1SR11240046-7SleevingInstall (New)6
1SR11240046-9SleevingInstall (New)7
FIGURE 9: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING AND WIRING -
ROUTING AND INSTALLATION
(SHEET 4 OF 5)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
58 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

### Page 59

NOTESQTYPART NUMBERNAMETASKSTEP
-1NMC1001-2ClampInstall/Kept8
1NMC1001-6Clamp
2NAS1252-8LWasher
13D0005-08-9Screw
1MS21042L08Nut
29D0254-1-2-9StrapInstall (New)
1NMC1001-6ClampInstall/Kept9
1NAS1252-8LWasher
13D0005-08-10Screw
19D0254-1-2-9StrapInstall (New)
2NMC1001-2ClampInstall/Kept10
1NAS1252-8LWasher
13D0005-08-14Screw
29D0254-1-2-9StrapInstall (New)
FIGURE 9: OBSERVER STATION UPPER MAIN CIRCUIT BREAKER PANEL - SLEEVING AND WIRING -
ROUTING AND INSTALLATION
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: July 19, 2002
MD11-24A204Revision 2 April 14, 2021
59 of 59
BOEING SERVICE BULLETIN MD11-24A204
ALERTALERT

---
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.