# Boeing Service Bulletin 747-52-2307: Revision 1

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- Document: [Boeing Service Bulletin 747-52-2307](https://openairdocs.org/service-documents/boeing/sb-747-52-2307.md)
- Title as filed: SB-747-52-2307-01
- Pages: 123
- PDF: https://openairdocs.org/files/sha256/7e/9d/7e9dcfa89aec9ed4ae2bc6830b1d609a6dc72106f1641f19de4704a2389e1047
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## Text

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### Page 1

Commercial 
Airplanes
747
Service Bulletin
SPECIAL ATTENTION
Number: 747-52-2307
Original Issue: May 23, 2017
Revision 1: May 02, 2018
ATA System: 5231 5234
SUBJECT: DOORS - Nose Cargo Door and Forward/Aft Cargo Door - Control Switch Change
Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15
CFR 300-774). An export license may be required before it is used for development, production or use by foreign
persons from specific countries. The controller of this data has the individual responsibility to abide by all export
laws.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET
Copyright © 2017 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Unpublished Work.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: May 23, 2017
747-52-2307Revision 1: May 02, 2018
1 of 123
2.0

### Page 2

Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
2 of 123
BOEING SERVICE BULLETIN 747-52-2307
BLANK PAGE

### Page 3

Table of Contents
Revision Transmittal Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 18
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
C. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 34
3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 35
3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
FIGURE 1: NOSE CARGO DOOR CONTROL SWITCH CHANGE  [Group 1] . . . . . . . . . . . . . . 43
FIGURE 2: NOSE CARGO DOOR AND LIGHT CONTROL MODULE, H121 - WIRE BUNDLE W2572
CHANGE [Group 1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
FIGURE 3: FORWARD CARGO DOOR CONTROL SWITCH REMOVAL . . . . . . . . . . . . . . . . 47
FIGURE 4: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY REMOVAL . . . . . . . . . 49
FIGURE 5: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY INSTALLATION . . . . . . 53
FIGURE 6: P86 PANEL - RESISTOR R2331 REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . 58
FIGURE 7: P86 PANEL - WIRE BUNDLE W0136 CHANGE . . . . . . . . . . . . . . . . . . . . . . . 61
FIGURE 8: WIRE BUNDLE W0572 CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
FIGURE 9: WIRE BUNDLE W1092 CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
3 of 123
BOEING SERVICE BULLETIN 747-52-2307

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FIGURE 10: WIRE BUNDLE W0572 AND W1092 ROUTING . . . . . . . . . . . . . . . . . . . . . . . 67
FIGURE 11: FORWARD CARGO DOOR CONTROL SWITCH INSTALLATION . . . . . . . . . . . . . 72
FIGURE 12: FORWARD CARGO DOOR LIGHT SWITCH AND MARKER INSTALLATION . . . . . . . 74
FIGURE 13: FORWARD CARGO DOOR CONTROL MARKER CHANGE  [Group 1-2] . . . . . . . . . 77
FIGURE 14: FORWARD CARGO DOOR CONTROL MARKER CHANGE [Group 3] . . . . . . . . . . . 80
FIGURE 15: AFT CARGO DOOR CONTROL SWITCH REMOVAL . . . . . . . . . . . . . . . . . . . . 83
FIGURE 16: AFT CARGO DOOR CONTROL PANEL REMOVAL . . . . . . . . . . . . . . . . . . . . . 85
FIGURE 17: AFT CARGO DOOR CONTROL SWITCH PAN CHANGE . . . . . . . . . . . . . . . . . . 88
FIGURE 18: P59 PANEL - RESISTOR R2332 REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . 96
FIGURE 19: P59 PANEL - WIRE BUNDLE W0080 CHANGE . . . . . . . . . . . . . . . . . . . . . . . 99
FIGURE 20: WIRE BUNDLE W0574 CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
FIGURE 21: WIRE BUNDLE W0574 ROUTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
FIGURE 22: AFT CARGO DOOR CONTROL SWITCH INSTALLATION . . . . . . . . . . . . . . . . 110
FIGURE 23: AFT CARGO DOOR LIGHT SWITCH AND MARKER INSTALLATION . . . . . . . . . . 112
FIGURE 24: AFT CARGO DOOR CONTROL MARKER CHANGE [Group 1-2] . . . . . . . . . . . . . 117
FIGURE 25: AFT CARGO DOOR CONTROL MARKER CHANGE  [Group 3] . . . . . . . . . . . . . . 120
APPENDIX A: PART DEMAND INTENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
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Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
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Commercial 
Airplanes
747
Service Bulletin
SPECIAL ATTENTION
Revision Transmittal SheetNumber: 747-52-2307Original Issue: May 23, 2017
Revision 1: May 02, 2018
ATA System: 5231 5234
SUBJECT: DOORS - Nose Cargo Door and Forward/Aft Cargo Door - Control Switch Change
This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION
Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2017-NM-090-AD, is related to
this service bulletin.
Effects of this Revision on airplanes on which Original Issue was previously done:
None.
REASON FOR REVISION
This revision is sent to incorporate findings from the validation of the Original Issue of this service bulletin.
Instructions are included to remove clips around the forward cargo door control switch pan assembly. If the clips
are not removed, they may become damaged when the control switch pan assembly is removed. Additionally,
wire routing instructions were added, certain wires were increased in length within kits, instructions were added
to install pressure seals during wire routing, and New FAA NPRM 2017-NM-090-AD added.
As a part of a service bulletin validation program, this change was completed on airplane RC009 by Service
Bulletin 747-52-2307 Original Issue before the release of Revision 1 of this service bulletin. The change completed
on airplane RC009 by Service Bulletin 747-52-2307 Original Issue is equivalent to the release of Revision 1 of
this service bulletin. Airplane RC009 has the Configuration of a Group 2 airplane.
These sections were changed:
1. Summary, Compliance; added related FAA NPRM information.
2. Paragraph 1.C., Reason; reason for revision statement added.
3. Paragraph 1.D., Description; effects of this revision statement added.
4. Paragraph 1.E., Compliance; added related FAA NPRM information.
5. Paragraph 1.J., References; added related FAA NPRM information.
6. Paragraph 2.C.1., Kits/Parts; updated revised kits.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
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7. Paragraph 2.C.2., Parts and Materials Supplied by the Operator; added footnote information.
8. Figure 4; clip removal information added.
9. Figure 5; clip installation information added.
10. Figure 8; wire routing information added for W0572-029-20 and W0572-026-20.
11. Figure 10; seal removal and installation work added.
12. Figure 17; rivet hole diameter changed.
13. Figure 20; flag note removed from flag note table.
14. Figure 21; seal removal and installation information added.
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
May 23, 2017Original Issue:
May 02, 2018Revision 1:
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
6 of 123
BOEING SERVICE BULLETIN 747-52-2307

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Commercial 
Airplanes
747
Service Bulletin
SPECIAL ATTENTION
SummaryNumber: 747-52-2307Original Issue: May 23, 2017
Revision 1: May 02, 2018
ATA System: 5231 5234
SUBJECT: DOORS - Nose Cargo Door and Forward/Aft Cargo Door - Control Switch Change
BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS DOCUMENT IMMEDIATELY.
CONCURRENT REQUIREMENTS
None.
BACKGROUND
This service bulletin gives instructions to change the nose, forward, and aft cargo door control switches and add
an arm switch to the forward and aft cargo doors. The safety intent of this service bulletin is to prevent failures
of the Nose, Forward, and Aft Cargo Door control switch from allowing un-commanded movement of the cargo
doors, which if not corrected could lead to personnel injury or death.
Operators have reported un-commanded operation for the forward and aft cargo doors due to failed control
switches. Testing of failed switches found that the cargo door control switch can remain actuated after released
to the OFF position. 747-8/8F Certification Maintenance Requirements Document D011U721-02-03 requires
existing Forward, Aft, and Nose Cargo Doors Control Switch replacement every 6 years. In the most recent
report of un-commanded cargo door operation the switch had only been installed for 44 months. Replacement
of the Nose, Forward, and Aft Cargo door control switch with a new improved switch, and the addition of an arm
switch in the open and close circuitry of the Forward and Aft Cargo Doors in accordance with this service bulletin
will prevent failures that could lead to cargo door un-commanded movement.
Boeing Service Related Problem (SRP) 747-8-SRP-52-0114 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 747 FTD 52-07001 is related to this service bulletin.
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 AffectedNoSpares Affected
Paragraph 1.E., Compliance and Paragraph
1.F., Approval
YesAD Related
Paragraph 1.H., Weight and Balance ChangesYesWeight and Balance Change
Paragraph 1.I., Electrical Load DataNoElectrical Load Changed
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
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ReferenceAffectedPlanning Data
Paragraph 1.K., Publications AffectedYesPublications Affected
Paragraph 1.K., Publications AffectedYesAirplane Flight Operations Affected (Flight Crew
Operations Manual and/or FAA Approved Air-
plane Flight Manual)
Paragraph 2.C.1., Kits/PartsYesKits/Parts Required
Paragraph 2.C.2., Parts and Materials Supplied
by the Operator
YesOperator Supplied Parts/Material
Paragraph 2.F., Special Tooling Necessary to
do this Service Bulletin
NoSpecial Tooling Required
ACTION (PRR 85901-148S)
Group 1:
WORK PACKAGE 1: NOSE CARGO DOOR CONTROL SWITCH CHANGE
1. Change the nose cargo door control switch.
2. Change wire bundle W2572.
WORK PACKAGE 2: FORWARD CARGO DOOR CONTROL SWITCH CHANGE
1. Replace existing forward cargo door control switch pan assembly (assembly) with new pan assembly.
2. Remove resistor R2331 from the P86 panel.
3. Change wire bundles W0136, W0572, and W1092.
4. Route wire bundles W0572 and W1092.
5. Install new forward cargo door control switch, arm switch, indicator, and support panel.
6. Change the forward cargo door control switch markers.
WORK PACKAGE 3: AFT CARGO DOOR CONTROL SWITCH CHANGE
1. Change the aft cargo door control switch pan.
2. Remove resistor R2332 from the P59 panel.
3. Change wire bundles W0080 and W0574.
4. Route wire bundle W0574.
5. Install new aft cargo door control switch, arm switch, indicator, and support panel.
6. Change the aft cargo door control switch markers.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
8 of 123
BOEING SERVICE BULLETIN 747-52-2307

### Page 9

EFFECTIVITY
747-8/-8F Airplane(s). Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s).
COMPLIANCE
Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2017-NM-090-AD, is related to
this service bulletin.
Boeing recommends that the change given in this service bulletin be done within 35 months after the Orignal
Issue date of this service bulletin.
INDUSTRY SUPPORT INFORMATION
Boeing warranty remedies are available for airplanes in warranty as of September 18, 2014. Please refer to
Paragraph 2.B., Industry Support Information. The warranty remedies will expire eight years from the original
issue date of this service bulletin.
MANPOWER
Elapsed HoursTotal Task HoursAirplanes
55.3077.80Group 1
53.2575.75Group 2 and 3
MATERIAL INFORMATION
Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
Operators are encouraged to complete the survey provided in APPENDIX A of this service bulletin to help Boeing
predict the quantity and timing of the Boeing Supplied Kits/Parts.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
9 of 123
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### Page 10 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
FORWARD CARGO
DOOR CONTROL
SWITCH CHANGE
AFT CARGO DOOR
CONTROL
SWITCH CHANGE
NOSE CARGO DOOR
CHANGE  CONTROL SWITCH  2508262
Original Issue: May 23, 2017
Revision 1: May 02, 2018  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  747-52-2307
Work - See page 1 for details.  10 of 123

### Page 11

Commercial 
Airplanes
747
Service Bulletin
SPECIAL ATTENTION
Number: 747-52-2307
Original Issue: May 23, 2017
Revision 1: May 02, 2018
ATA System: 5231 5234
SUBJECT: DOORS - Nose Cargo Door and Forward/Aft Cargo Door - Control Switch Change
BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS DOCUMENT IMMEDIATELY.
1.    PLANNING INFORMATION
A. Effectivity
1. Airplanes
This service bulletin is applicable to 747-8/-8F Airplanes, line numbers 1420-1536 in 3 Groups.
The Variable Numbers and Group Information for the applicable airplanes is given below. An
equivalent change is on subsequent production airplanes. Refer to PRR 85901-148S for data
about this change.
Refer to Service Bulletin Index D6-30300 Part 3 for Airplane Variable Number, Line Number, and
Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP
747-8F airplanes line numbers 1420-1536-1
747-8 airplanes line numbers 1434-1531 except line numbers 1499,
1507, 1508, 1510, 1515, 1517, and 1518
-2
747-8 airplanes line numbers 1499, 1507, 1508, 1510, 1515, 1517,
and 1518
-3
Airplane Models:
747-8, 747-8F
GroupVariable Number
2RC001 - RC009
2RC021 - RC040
2RC051 - RC057
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### Page 12

GroupVariable Number
3RC066 - RC072
2RC076 - RC077
1RC501 - RC514
1RC521 - RC528
1RC541
1RC546 - RC566
1RC571 - RC582
1RC601 - RC605
1RC641 - RC644
1RC651 - RC652
1RC661
1RC671 - RC674
2. Spares Affected
None.
B. Concurrent Requirements
None.
C. Reason
This service bulletin gives instructions to change the nose, forward, and aft cargo door control switches
and add an arm switch to the forward and aft cargo doors. The safety intent of this service bulletin is
to prevent failures of the Nose, Forward, and Aft Cargo Door control switch from allowing un-commanded
movement of the cargo doors, which if not corrected could lead to personnel injury or death.
Operators have reported un-commanded operation for the forward and aft cargo doors due to failed
control switches. Testing of failed switches found that the cargo door control switch can remain actuated
after released to the OFF position. 747-8/8F Certification Maintenance Requirements Document
D011U721-02-03 requires existing Forward, Aft, and Nose Cargo Doors Control Switch replacement
every 6 years. In the most recent report of un-commanded cargo door operation the switch had only
been installed for 44 months. Replacement of the Nose, Forward, and Aft Cargo door control switch
with a new improved switch, and the addition of an arm switch in the open and close circuitry of the
Forward and Aft Cargo Doors in accordance with this service bulletin will prevent failures that could
lead to cargo door un-commanded movement.
Revision 1 is sent to incorporate findings from the validation of the Original Issue of this service bulletin.
Instructions are included to remove clips around the forward cargo door control switch pan assembly.
If the clips are not removed, they may become damaged when the control switch pan assembly is
removed. Additionally, wire routing instructions were added, certain wires were increased in length
within kits, instructions added to install pressure seals during wire routing, and New FAA Notice of
Proposed Rule Making NPRM 2017-NM-090-AD added.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
12 of 123
BOEING SERVICE BULLETIN 747-52-2307

### Page 13

Boeing Service Related Problem (SRP) 747-8-SRP-52-0114 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 747 FTD 52-07001 is related to this service bulletin.
D. Description
Group 1:
WORK PACKAGE 1: NOSE CARGO DOOR CONTROL SWITCH CHANGE
1. Change the nose cargo door control switch.
2. Change wire bundle W2572.
WORK PACKAGE 2: FORWARD CARGO DOOR CONTROL SWITCH CHANGE
1. Replace existing forward cargo door control switch pan assembly (assembly) with new pan
assembly.
2. Remove resistor R2331 from the P86 panel.
3. Change wire bundles W0136, W0572, and W1092.
4. Route wire bundles W0572 and W1092.
5. Install new forward cargo door control switch, arm switch, indicator, and support panel.
6. Change the forward cargo door control switch markers.
WORK PACKAGE 3: AFT CARGO DOOR CONTROL SWITCH CHANGE
1. Change the aft cargo door control switch pan.
2. Remove resistor R2332 from the P59 panel.
3. Change wire bundles W0080 and W0574.
4. Route wire bundle W0574.
5. Install new aft cargo door control switch, arm switch, indicator, and support panel.
6. Change the aft cargo door control switch markers.
Effects of this Revision on airplanes on which Original Issue was previously done:
None.
The work in this service bulletin is done in the maintenance zone(s) given below.
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1: May 02, 2018
13 of 123
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### Page 14

Group 1:
Affected Maintenance Zones
ZoneModel
122, 142, 211747-8F
Group 2-3:
Affected Maintenance Zones
ZoneModel
122, 142747-8
E. Compliance
Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2017-NM-090-AD, is
related to this service bulletin.
Boeing recommends that the change given in this service bulletin be done within 35 months after the
Original Issue 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
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 the cargo door control switch
change for each nose, forward, and aft cargo door. 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
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Group 1:
WORK PACKAGE 1: NOSE CARGO DOOR CONTROL SWITCH CHANGE
Elapsed HoursTask HoursNumber of PersonsTask
0.250.251OPEN ACCESS
0.500.501FIGURE 1
0.800.801FIGURE 2
0.250.251CLOSE ACCESS
0.250.251Test
2.052.05TOTAL FOR EACH AIRPLANE
Group 1-2:
WORK PACKAGE 2: FORWARD CARGO DOOR CONTROL SWITCH CHANGE
Elapsed HoursTask HoursNumber of PersonsTask
3.303.301OPEN ACCESS
1.001.001FIGURE 3 and FIG-
URE 4
2.102.101FIGURE 5
0.400.401FIGURE 6
0.200.201FIGURE 7
10.0520.102FIGURE 8 and FIG-
URE 10
2.002.001FIGURE 9 and FIG-
URE 10
1.201.201FIGURE 11 and FIG-
URE 12
1.001.001FIGURE 13
3.303.301CLOSE ACCESS
0.250.251Test
24.8034.85TOTAL FOR EACH AIRPLANE
Group 3:
WORK PACKAGE 2: FORWARD CARGO DOOR CONTROL SWITCH CHANGE
Elapsed HoursTask HoursNumber of PersonsTask
3.303.301OPEN ACCESS
1.001.001FIGURE 3 and FIG-
URE 4
2.102.101FIGURE 5
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Group 3:
WORK PACKAGE 2: FORWARD CARGO DOOR CONTROL SWITCH CHANGE
Elapsed HoursTask HoursNumber of PersonsTask
0.400.401FIGURE 6
0.200.201FIGURE 7
10.0520.102FIGURE 8 and FIG-
URE 10
2.002.001FIGURE 9 and FIG-
URE 10
1.201.201FIGURE 11 and FIG-
URE 12
1.001.001FIGURE 14
3.303.301CLOSE ACCESS
0.250.251Test
24.8034.85TOTAL FOR EACH AIRPLANE
Group 1-2:
WORK PACKAGE 3: AFT CARGO DOOR CONTROL SWITCH CHANGE
Elapsed HoursTask HoursNumber of PersonsTask
3.303.301OPEN ACCESS
1.501.501FIGURE 15 and FIG-
URE 16
3.003.001FIGURE 17
1.201.201FIGURE 18
0.200.201FIGURE 19
12.4524.902FIGURE 20 and FIG-
URE 21
2.252.251FIGURE 22 and FIG-
URE 23
1.001.001FIGURE 24
3.303.301CLOSE ACCESS
0.250.251Test
28.4540.90TOTAL FOR EACH AIRPLANE
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Group 3:
WORK PACKAGE 3: AFT CARGO DOOR CONTROL SWITCH CHANGE
Elapsed HoursTask HoursNumber of PersonsTask
3.303.301OPEN ACCESS
1.501.501FIGURE 15 and FIG-
URE 16
3.003.001FIGURE 17
1.201.201FIGURE 18
0.200.201FIGURE 19
12.4524.902FIGURE 20 and FIG-
URE 21
2.252.251FIGURE 22 and FIG-
URE 23
1.001.001FIGURE 25
3.303.301CLOSE ACCESS
0.250.251Test
28.4540.90TOTAL FOR EACH AIRPLANE
H. Weight and Balance Changes
Group 1:
Change in Moment
(Pound-Inches)
Change in Weight
(Pounds)Airplane
+683.2+0.6747-8F
Group 2:
Change in Moment
(Pound-Inches)
Change in Weight
(Pounds)Airplane
+683.9+0.6747-8
Group 3:
Change in Moment
(Pound-Inches)
Change in Weight
(Pounds)Airplane
+693.1+0.6747-8
I. Electrical Load Data
Not applicable.
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### Page 18

J. References
1. Existing Data:
a. Engineering Change Memo PRR 85901-148S
b. Boeing Service Letter 747-SL-00-018
c. Boeing Service Related Problem (SRP) 747-8-SRP-52-0114
d. Federal Aviation Administration (FAA) Notice of Proposed Rule Making (NPRM)
2017-NM-090-AD
e. Service Bulletin Index D6-30300
f. Standard Overhaul Practices Manual (SOPM) 20-30-12, 20-41-02, 20-41-05, 20-43-03,
20-44-01, 20-50-01, 20-50-05, 20-50-10, 20-50-12, 20-50-19
g. Standard Wiring Practices Manual (SWPM) 20-10-11, 20-10-12, 20-10-19, 20-10-20, 20-30-11
h. 747 Fleet Team Digest (FTD) 52-07001
i. 747-8 Aircraft Maintenance Manual (AMM) 05-51-08, 20-11-08, 25-52-01, 25-80-00, 52-31-00,
52-31-17, 52-34-00
j. 747-8 Structural Repair Manual (SRM) 51-40-02
k. 747-8 Wiring Diagram Manual (WDM) 33-37-31, 52-31-14, 52-34-11, 52-35-11
2. Data Supplied with this Service Bulletin:
None.
3. Installation Drawings Used in the Preparation of this Service Bulletin:
TitleDrawing Number
Skin Panel Assy S-34R to S-44R, STA 520 to 741.1142U3662
Skin Assembly - STA 1741.1 to 1961.1, S-34R to S-46R146U3762
Door Installation - Access, Control Switch, FWD Cargo Door65B07309
Door Installation - Access, Control Switch, AFT Cargo Door65B07310
Switch Instl - Cargo Door Control & Light65B41786
Pan Assy, Control Switch - FWD and AFT Cargo Doors65B23264
Equip Assy Lower FWD Cargo Panel (P86)65B41650
Equip Assy - Aft Cargo Equipment, P59284U0059
Conduit Installation FWD Cargo Door65B70620
Conduit Installation AFT Cargo Door65B70621
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### Page 19

TitleDrawing Number
Conduit Instl - AFT Cargo Door65B70900
Wire Bundle Instl - Lower Sidewall RH, STA 523 Thru 723288U4208
Wire Bundle Instl - Main Deck Floor Beams RH, STA 523 Thru 723288U4210
Wire Bundle Instl - Lower Sidewall RH, STA 1723 Thru 1983288U4628
Wire Bundle Instl - Main Deck Floor Beams RH, STA 1723 Thru
1983
288U4630
Control Switch Forward AFT and Nose Cargo Door Revision289U1309
Marker Kit - Lower Lobe Cargo Door Upgrade, Sect 42 and 46675U0400
Control Switch Pan, Retrofit Kit - FWD and AFT Cargo Doors675U0014
The table above lists applicable drawings used to prepare this service bulletin. The drawings are
not necessary to make the specified changes, and are not supplied with this service bulletin. The
drawings may not be applicable to all airplane configurations or operators.
K. Publications Affected
1. Publications:
Chapter-SectionPublication
1.30747-8 Flight Crew Operations Manual
52-31, 52-34747 Aircraft Maintenance Manual - System
Description Section
52-31, 52-34747 Aircraft Maintenance Manual - Practices
and Procedures
33-37, 52-31, 52-34, 52-35, Equip-
ment List
747 Wiring Diagram Manual
11-20, 11-32, 25,53, 33-37, 52-34747 Illustrated Parts Catalog
33-37, 52-31, 52-34, 52-35747 System Schematic Manual
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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### Page 20

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BLANK PAGE

### Page 21

2.    MATERIAL INFORMATION
A. Material - Price and Availability
Boeing can supply the kits shown in Paragraph 2.C., Parts Necessary for Each Airplane. Operators
are encouraged to share schedule requirements with Boeing for incorporation of the service bulletin.
The kits are subject to the terms and conditions of the Boeing standard purchase order acknowledgment.
Prices are in United States Dollars. Terms: Net 30 days.
Reference this service bulletin and submit your purchase order by one of these methods:
1. Order on-line via ATA Spec 2000 or The Boeing PART Page
2. Fax to (206) 662-7145
REFER TO THE BOEING PART PAGE ON MYBOEINGFLEET.COM OR CONTACT FIRST RESPONDER
AT FR@BOEING.COM FOR THE LATEST REORDER LEAD TIME (ROLT) AND PRICE INFORMATION
Unit Price as of
the original issue
date of this Ser-
vice Bulletin (US
Dollars)
ROLT as of the
original issue
date of this Ser-
vice Bulletin (Cal-
endar Days)
NameKit Number
$400.00118TOP KIT, RETROFIT - NOSE CARGO
DOOR CONTROL SWITCH CHANGE
015U2165-1 (a)
$7,840.00349TOP KIT, RETROFIT - FWD CARGO DOOR
CONTROL SWITCH CHANGE
015U2165-2 (b)
$7,840.00349TOP KIT, RETROFIT - FWD CARGO DOOR
CONTROL SWITCH CHANGE
015U2165-3 (c)
$3,490.00577TOP KIT, RETROFIT - AFT CARGO DOOR
CONTROL SWITCH CHANGE
015U2165-4 (d)
$3,490.00577TOP KIT, RETROFIT - AFT CARGO DOOR
CONTROL SWITCH CHANGE
015U2165-5 (e)
$572.00284MARKER KIT - LOWER LOBE CARGO
DOOR CARGO UPGRADE, SECT 42
675U0400-1 (b)
$572.00284MARKER KIT - LOWER LOBE CARGO
DOOR CARGO UPGRADE, SECT 42 BI-
LINGUAL
675U0400-2 (c)
$572.00284MARKER KIT - LOWER LOBE CARGO
DOOR CARGO UPGRADE, SECT 46
675U0400-3 (d)
$572.00284MARKER KIT - LOWER LOBE CARGO
DOOR CARGO UPGRADE, SECT 46 BI-
LINGUAL
675U0400-4 (e)
(a) This kit is for Group 1 Work Package 1.
(b) This kit is for Group 1 and Group 2 Work Package 2.
(c) This kit is for Group 3 Work Package 2.
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### Page 22

REFER TO THE BOEING PART PAGE ON MYBOEINGFLEET.COM OR CONTACT FIRST RESPONDER
AT FR@BOEING.COM FOR THE LATEST REORDER LEAD TIME (ROLT) AND PRICE INFORMATION
Unit Price as of
the original issue
date of this Ser-
vice Bulletin (US
Dollars)
ROLT as of the
original issue
date of this Ser-
vice Bulletin (Cal-
endar Days)
NameKit Number
(d) This kit is for Group 1 and Group 2 Work Package 3.
(e) This kit is for Group 3 Work Package 3.
REFER TO THE BOEING PART PAGE ON MYBOEINGFLEET.COM OR CONTACT FIRST
RESPONDER AT FR@BOEING.COM FOR THE LATEST PRICE INFORMATION
Unit Price as of the
original issue date
of this Service Bul-
letin (US Dollars)
NamePart Number
$25.00MARKER - ALUMINUM FOIL,
CARGO DOOR CONTROL
284U2700-98
$15.00MARKER - VINYL, CARGO
DOOR ARM S786
284U2700-99
$15.00MARKER - VINYL, CARGO
DOOR ARM S785
284U2700-100
$15.00VINYL MARKER, CARGO
DOOR CONTROL M710
BAC27EEL14960
$15.00VINYL MARKER, CARGO
DOOR CONTROL M712
BAC27EEL14961
$15.00VINYL MARKER, EXTERNAL
CARGO LIGHTS S143
BAC27EEL14962
$15.00VINYL MARKER, EXTERNAL
CARGO LIGHTS S144
BAC27EEL14963
Operators are encouraged to complete the survey provided in APPENDIX A of this service bulletin to
help Boeing predict the quantity and timing of the Boeing Supplied Kits/Parts.
B. Industry Support Information
Boeing warranty remedies are available for 747 airplanes in warranty as of September 18, 2014. For
task hour reimbursement for airplanes in warranty as of that date, send a warranty claim to Boeing
Fleet Support Contracts - Warranty. The kits for airplanes in warranty as of that date will be supplied
at no charge. Send a purchase order for the kits to Boeing Material Management. Please refer to this
service bulletin number and reference the airplane variable number(s) in your purchase order. The
warranty remedies will expire eight years from the original issue date of this service bulletin.
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### Page 23

C. Parts Necessary for Each Airplane
1. Kits/Parts
To get the kits/parts shown below, refer to Paragraph 2.A., Material - Price and Availability.
NOTE: One top kit and the items shown in Paragraph 2.C.2., Parts and Materials Supplied by
the Operator, are necessary for each cargo door.
Group 1:
Kit 015U2165
NotesExisting Part
Number
NameQtyNew Part Number
-1
--TOP KIT, RETROFIT - NOSE
CARGO DOOR CONTROL
SWITCH CHANGE
-015U2165-1
--ASSY -105 (W02572)1289U1309-105
(a)284U7410-1SWITCH, TOGGLE1MS24524-27
(a) Discard the existing part.
Group 1:
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-105
--ASSY -105 (W02572)-289U1309-105
--WIRE - RAW MATERIAL1289U1309-105W
--ID TAPE - CONNECTOR1289U1309-10501
(a)-CONTACT, PIN4BACC47CN1S
(a)-TERMINAL, LUG3BACT12AC2
(a)-TERMINAL, LUG3BACT12AC6
(a)-TERMINAL5BACT12AR202
(a) There are more parts than are necessary.
Group 1:
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-105W
--WIRE - RAW MATERIAL-289U1309-105W
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### Page 24

Group 1:
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-105W
--WIRE1BMS13-
48T10C01G020
Group 1:
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-10501
--ID TAPE - CONNECTOR-289U1309-10501
--TAPE, ID1BACT19C-T
Kit 015U2165
NotesExisting Part
Number
NameQtyNew Part Number
-5-4-3-2
(c)-TOP KIT,
RETROFIT - FWD
CARGO DOOR
CONTROL
SWITCH CHANGE
...-015U2165-2
(d)-TOP KIT,
RETROFIT - FWD
CARGO DOOR
CONTROL
SWITCH CHANGE
..-.015U2165-3
(e)-TOP KIT,
RETROFIT - AFT
CARGO DOOR
CONTROL
SWITCH CHANGE
.-..015U2165-4
(f)-TOP KIT,
RETROFIT - AFT
CARGO DOOR
CONTROL
SWITCH CHANGE
-...015U2165-5
--CLAMP..11287T0011-2
--ASSY -101
(W0574)
11..289U1309-101
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### Page 25

Kit 015U2165
NotesExisting Part
Number
NameQtyNew Part Number
-5-4-3-2
--ASSY -102
(W0080)
11..289U1309-102
--ASSY -103
(W0572)
..11289U1309-103
--ASSY -104
(W0136)
..11289U1309-104
--ASSY -106
(W1092)
..11289U1309-106
--LAMP 28V T 1
3per4 FLANGE
BASE PER DWG
B14142 CHICAGO
MINIATURE LAMP
INC
1111387
--RETAINER CLIP
ASSY
..11411A4902-7
--INDICATOR,
PRESS-TO-TEST
11115-86546-071
--CONTROL
SWITCH PAN,
RETROFIT KIT -
FWD CARGO
DOOR
..11675U0014-1
--CONTROL
SWITCH PAN,
RETROFIT KIT -
AFT CARGO
DOOR
11..675U0014-2
--SUPPORT PANEL,
CARGO DOOR
CONTROL, LOW-
ER LOBE
111169B47815-23
(b)-SCREW..11BACS12GU3K4
(b)-SCREW4444BACS12GU3K8
--SEAL1111BACS45A13
(a)284U7410-1SWITCH, TOGGLE2222MS24524-27
--WASHER4455NAS1149D0316J
(a) Discard the existing part.
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### Page 26

Kit 015U2165
NotesExisting Part
Number
NameQtyNew Part Number
-5-4-3-2
(b) If grip length shown is not available at Boeing, fasteners supplied in kits may be one grip length
longer than indicated. Also, if any fasteners part numbers listed are not available or have been su-
perseded, substitute fasteners may be supplied in kits.
(c) This kit is for Group 1 and Group 2 Work Package 2.
(d) This kit is for Group 3 Work Package 2.
(e) This kit is for Group 1 and Group 2 Work Package 3.
(f) This kit is for Group 3 Work Package 3.
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-103
--ASSY -103 (W0572)-289U1309-103
--WIRE - RAW MATERIAL1289U1309-103W
--ID TAPE - CONNECTOR1289U1309-10301
(a)-CONTACT, SOCKET4BACC47CP1S
(a)-TERMINAL, LUG5BACT12AC6
(a)-TERMINAL14BACT12AR202
(a)-TERMINAL2BACT12AR204
(a)-PLUG4MS27488-20-1
(a) There are more parts than are necessary.
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-103W
--WIRE - RAW MATERIAL-289U1309-103W
--WIRE1BMS13-
48T10C01G020
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-10301
--ID TAPE - CONNECTOR-289U1309-10301
--TAPE, ID1BACT19C-T
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### Page 27

Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-104
--ASSY -104 (W0136)-289U1309-104
(a)-PLUG3MS27488-20-1
(a) There are more parts than are necessary.
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-106
--ASSY -106 (W1092)-289U1309-106
--WIRE - RAW MATERIAL1289U1309-106W
(a)-TERMINAL3BACT12AR202
(a)-SPLICE SEALED CRIMP3D-436-36
(a) There are more parts than are necessary.
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-106W
--WIRE - RAW MATERIAL-289U1309-106W
--WIRE1BMS13-
48T10C01G020
Kit 675U0014
NotesExisting Part
Number
NameQtyNew Part Number
-1
--CONTROL SWITCH PAN,
RETROFIT KIT - FWD CARGO
DOOR
-675U0014-1
--PAN ASSY165B23264-4
(a)(b)-BOLT, 100 DEG HEX DR16BACB30NW6K4Y
(a)(b)-BOLT, 100 DEG HEX DR20BACB30NW6K5Y
(a)-BOLT, PROTRUDING HD8BACB30VT5HK2
--COLLAR, SHEAR8BACC30BL5
(b)-COLLAR36BACC30R6
--FILLER, FLAT4BACF3F011L011NN
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### Page 28

Kit 675U0014
NotesExisting Part
Number
NameQtyNew Part Number
-1
(a)-RIVET8BACR15BB4D4C
--SHIM,LAMINATED4BACS40R007E010F
(a) If grip length shown is not available at Boeing, fasteners supplied in kits may be one grip
length longer than indicated. Also, if any fasteners part numbers listed are not available or
have been superseded, substitute fasteners may be supplied in kits.
(b) There are more parts than are necessary.
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-101
--ASSY -101 (W0574)-289U1309-101
--WIRE - RAW MATERIAL1289U1309-101W
--ID TAPE - CONNECTOR1289U1309-10101
--ID TAPE - CONNECTOR1289U1309-10102
--ID TAPE - CONNECTOR1289U1309-10103
(a)-CONTACT6BACC47CN2S
(a)-CONTACT, SOCKET4BACC47CP1S
(a)-TERMINAL, LUG5BACT12AC6
(a)-TERMINAL3BACT12AR182
--TERMINAL8BACT12AR202
(a)-TERMINAL2BACT12AR204
(a)-SPLICE2D-436-37
(a)-PLUG4MS27488-20-1
(a) There are more parts than are necessary.
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-101W
--WIRE - RAW MATERIAL-289U1309-101W
--WIRE1BMS13-
48T10C01G018
--WIRE1BMS13-
48T10C01G020
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### Page 29

Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-10101
--ID TAPE - CONNECTOR-289U1309-10101
--TAPE, ID1BACT19C-T
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-10102
--ID TAPE - CONNECTOR-289U1309-10102
--TAPE, ID1BACT19C-T
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-10103
--ID TAPE - CONNECTOR-289U1309-10103
--TAPE, ID1BACT19C-T
Kit 289U1309
NotesExisting Part
Number
NameQtyNew Part Number
-102
--ASSY -102 (W0080)-289U1309-102
(a)-PLUG3MS27488-20-1
(a) There are more parts than are necessary.
Kit 675U0014
NotesExisting Part
Number
NameQtyNew Part Number
-2
--CONTROL SWITCH PAN,
RETROFIT KIT - AFT CARGO
DOOR
-675U0014-2
--DOUBLER1675U0014-11
--DOUBLER1675U0014-12
(b)-BRACKET169B17889U5
(b)-BRACKET169B17889U6
(a)-BOLT, HEX DRIVE6BACB30NX6K2Y
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### Page 30

Kit 675U0014
NotesExisting Part
Number
NameQtyNew Part Number
-2
(a)-BOLT, PROTRUDING HD8BACB30NX6K3Y
(a)-BOLT, PROTRUDING HD4BACB30NX6K5Y
(a)-BOLT, PROTRUDING HEAD8BACB30VT6K3
--COLLAR8BACC30BL6
(c)-COLLAR20BACC30R6
--FILLER, RECTANGULAR4BACF3H07JF006HN
--NUTPLATE, SELF-LOCK4BACN10KA3CCD
(a)-RIVET, UNIVERSAL HD6BACR15BB6D5C
(a)-RIVET8BACR15CE3AD4
--SEAL, RING2BACS11BD1
--SEAL, RING2BACS11BD2
--SEAL1BACS45B1
--RING, RETAINING, EXT1MS16624-2087
(a) If grip length shown is not available at Boeing, fasteners supplied in kits may be one grip
length longer than indicated. Also, if any fasteners part numbers listed are not available or
have been superseded, substitute fasteners may be supplied in kits.
(b) To make installation easier, some Boeing parts are supplied in a temporary configuration.
Those parts are identified with a 'U', 'W', or 'Y' in place of the '-' (dash) in the part number.
It is permitted to install parts identified with a 'U', 'W', or 'Y' as an alternative to the '-' (dash)
part number. Refer to Boeing Drawing 005W0900 and Boeing Service Letter 747-SL-00-
018 for more information.
(c) There are more parts than are necessary.
Group 1-2:
Kit 675U0400
NotesExisting Part
Number
NameQtyNew Part Number
-1
(b)-MARKER KIT - LOWER LOBE
CARGO DOOR UPGRADE,
SECT 42
-675U0400-1
(a)-MARKER - CARGO DOOR
SWITCH-OUTSIDE... (WARN-
ING)
1140U0430-43
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### Page 31

Group 1-2:
Kit 675U0400
NotesExisting Part
Number
NameQtyNew Part Number
-1
(a)-MARKER - WARNING! CRUSH
HAZARD. STAY OUT OF
DOOR PATH. CAN CAUSE IN-
JURY OR DEATH.
1140U0430-44
(a)-MARKER - CARGO DOOR
SWITCH-INSIDE... (WARNING)
1140U0430-47
(a) This part has a limited shelf life.
(b) This kit has a limited shelf life.
Group 3:
Kit 675U0400
NotesExisting Part
Number
NameQtyNew Part Number
-2
(b)-MARKER KIT - LOWER LOBE
CARGO DOOR UPGRADE,
SECT 42 BI-LINGUAL
-675U0400-2
(a)-MARKER - CARGO DOOR
SWITCH-OUTSIDE... (EN-
GLISH/CHINESE WARNING)
1140U0430-45
(a)-MARKER - WARNING! CRUSH
HAZARD. STAY OUT OF
DOOR PATH. CAN... (EN-
GLISH/CHINESE)
1140U0430-46
(a)-MARKER - CARGO DOOR
SWITCH-INSIDE... (EN-
GLISH/CHINESE WARNING))
1140U0430-48
(a) This part has a limited shelf life.
(b) This kit has a limited shelf life.
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### Page 32

Group 1-2:
Kit 675U0400
NotesExisting Part
Number
NameQtyNew Part Number
-3
(b)-MARKER KIT - LOWER LOBE
CARGO DOOR UPGRADE,
SECT 46
-675U0400-3
(a)-MARKER - CARGO DOOR
SWITCH-OUTSIDE... (WARN-
ING)
1140U0430-43
(a)-MARKER - WARNING! CRUSH
HAZARD. STAY OUT OF
DOOR PATH. CAN CAUSE IN-
JURY OR DEATH.
1140U0430-44
(a)-MARKER - CARGO DOOR
SWITCH-INSIDE... (WARNING)
1140U0430-47
(a) This part has a limited shelf life.
(b) This kit has a limited shelf life.
Group 3:
Kit 675U0400
NotesExisting Part
Number
NameQtyNew Part Number
-4
(b)-MARKER KIT - LOWER LOBE
CARGO DOOR UPGRADE,
SECT 46 BI-LINGUAL
-675U0400-4
(a)-MARKER - CARGO DOOR
SWITCH-OUTSIDE... (EN-
GLISH/CHINESE WARNING)
1140U0430-45
(a)-MARKER - WARNING! CRUSH
HAZARD. STAY OUT OF
DOOR PATH. CAN... (EN-
GLISH/CHINESE)
1140U0430-46
(a)-MARKER - CARGO DOOR
SWITCH-INSIDE... (EN-
GLISH/CHINESE WARNING))
1140U0430-48
(a) This part has a limited shelf life.
(b) This kit has a limited shelf life.
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### Page 33

Group 1-2:
NotesNameWork Package
3 QTY
Work Package
2 QTY
Part Number /
Specification
(a)MARKER - ALUMINUM FOIL, CARGO
DOOR CONTROL
11284U2700-98
(a)MARKER - VINYL, CARGO DOOR ARM
S786
1-284U2700-99
(a)MARKER - VINYL, CARGO DOOR ARM
S785
-1284U2700-100
(a)VINYL MARKER, CARGO DOOR CON-
TROL M710
-1BAC27EEL14960
(a)VINYL MARKER, CARGO DOOR CON-
TROL M712
1-BAC27EEL14961
(a)VINYL MARKER, EXTERNAL CARGO
LIGHTS S143
-1BAC27EEL14962
(a)VINYL MARKER, EXTERNAL CARGO
LIGHTS S144
1-BAC27EEL14963
(b)MARKER KIT - LOWER LOBE CARGO
DOOR UPGRADE, SECT 42
-1675U0400-1
(b)MARKER KIT - LOWER LOBE CARGO
DOOR UPGRADE, SECT 46
1-675U0400-3
(a) This part has a limited shelf life.
(b) This kit has a limited shelf life.
Group 3:
NotesNameWork Package
3 QTY
Work Package
2 QTY
Part Number /
Specification
(a)MARKER - ALUMINUM FOIL, CARGO
DOOR CONTROL
11284U2700-98
(a)MARKER - VINYL, CARGO DOOR ARM
S786
1-284U2700-99
(a)MARKER - VINYL, CARGO DOOR ARM
S785
-1284U2700-100
(a)VINYL MARKER, CARGO DOOR CON-
TROL M710
-1BAC27EEL14960
(a)VINYL MARKER, CARGO DOOR CON-
TROL M712
1-BAC27EEL14961
(a)VINYL MARKER, EXTERNAL CARGO
LIGHTS S143
-1BAC27EEL14962
(a)VINYL MARKER, EXTERNAL CARGO
LIGHTS S144
1-BAC27EEL14963
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### Page 34

Group 3:
NotesNameWork Package
3 QTY
Work Package
2 QTY
Part Number /
Specification
(b)MARKER KIT - LOWER LOBE CARGO
DOOR UPGRADE, SECT 42 BI-LINGUAL
-1675U0400-2
(b)MARKER KIT - LOWER LOBE CARGO
DOOR UPGRADE, SECT 46 BI-LINGUAL
1-675U0400-4
(a) This part has a limited shelf life.
(b) This kit has a limited shelf life.
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.
NotesNameQTYPart Number /
Specification
(a)Sealant10 OzBMS5-95
(a)(d)PRIMER4 OzBMS 10-11, TYPE
I
(a)Organic Corrosion Inhibiting Com-
pound
4 OzBMS3-23
(b)Fairing Compound2 OzEC-3587
(c)Chemical Conversion Coating4 OzType II, Class A
-LACING TAPE - WHITE - PRESSUR-
IZED (TEMP 135 DEG)
As Required829A9001-1
-LACING TAPE - BLUE - PRESSUR-
IZED (TEMP 135 DEG)
As Required829A9001-5
(a)StrapAs RequiredBACS38K()
(a) Refer to the Qualified Products List at the end of the Boeing Material Specification (BMS)
for supplier data.
(b) Can be purchased from: 3M Company 3211 E Chestnut Expy Springfield, Missouri 65802
CAGE: 6A670. BMS5-95 is an approved equivalent.
(c) Refer to SOPM 20-43-03 for material information. Some conversion coatings contain
Chromium trioxide/Chromic Acid and are not available in the European Union as of
September 2017 without an authorization. EU operators are encouraged to ensure their
suppliers are authorized to provide the material after the sunset date and users comply
with the risk mitigation measures and operational conditions.
(d) Some primers contain Strontium Chromate and will not be available in the European
Union after January 2019 without an authorization. EU operators are encouraged to ensure
their suppliers are authorized to provide the material after the sunset date and users
comply with the risk mitigation measures and operational conditions.
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### Page 35

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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### Page 36

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BLANK PAGE

### Page 37

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. The work instructions are divided into work packages. Task Hours and Elapsed Hours
for each package are given in Paragraph 1.G., Manpower. You can do each work
package independently.
4. Unless shown differently, these dimensions and tolerances are used:
– Linear dimensions are in inches
– Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus
or minus 0.03 inch
– Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch
– Angular tolerance is plus or minus 2 degrees
– Hole dimensions for standard solid rivets and fasteners are in Structural Repair
Manual (SRM) Chapter 51
– Torque Values:
— Values for structural fasteners are given in 747 Structural Repair Manual,
Chapter 51.
— Values for airframe maintenance tasks are included in Chapter 20 of 747
Aircraft Maintenance Manual (AMM).
— Values for electrical maintenance tasks are included in Chapter 20 of
Standard Wiring Practices Manual (SWPM).
— Values for engine maintenance tasks are included in Chapter 70 of 747
Aircraft Maintenance Manual (AMM).
— Non-standard torque values for maintenance tasks are included in the
applicable installation step.
5. Use the approved fastener, process and material substitutions in accordance with
SRM Chapter 51.
6. Refer to the SWPM 20-10-11 and SWPM 20-10-12 for the wire installation procedures,
and SWPM 20-10-19 for the wire separation requirements, as accepted procedures.
7. The necessary conditions for selection of clamp type and size are included in SWPM
20-10-12. If any wire bundle support clamp specified in this service bulletin does not
make a correct fit on the wire bundle, refer to SWPM 20-10-12 as an accepted
procedure to select a clamp that fits correctly.
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### Page 38

8. If the length of any fastener specified in this service bulletin does not meet installation
standards given in SRM Chapter 51, then a fastener of the same specification, or
an approved substitute, with a length which meets the installation standards given
in SRM Chapter 51 may be used. In addition, washers may be installed for fastener
grip length in accordance with SRM Chapter 51. Refer to SOPM 20-50-01 for alternate
full threaded fasteners (screws) needed for installation in this service bulletin.
9. 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.
10. The instructions in Paragraph 3.B., Work Instructions and the figures can include
operation of tools or test equipment. Boeing Engineering Tool Drawings, the Illustrated
Tool and Equipment Manual, and the Special Tool and Ground Handling Drawing
Index contain data on versions of the tools or test equipment that you can use. It is
permitted to use replaced tools. It is not permitted to use superseded tools.
11. 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.
12. 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.
13. This service bulletin includes functional test procedures for the systems changed by
this service bulletin. More functional tests can possibly be necessary in accordance
with standard maintenance practices because of interruption to other airplane systems.
14. Some Boeing parts are supplied in a temporary configuration. Those parts are
identified with a 'U', 'W', or 'Y' in place of the '-' (dash) in the part number. It is
permitted to install parts identified with a 'U', 'W', or 'Y' as an alternative to the '-'
(dash) part number. Boeing Drawing 005W0900 contains more data.
15. Use of colors in Figures is based on guidance from the ATA e-Business Program
(ATA) iSpec 2200.
16. The compliance times for the actions in Paragraph 3.B., WORK INSTRUCTIONS
are in Paragraph 1.E., Compliance.
17. 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.
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### Page 39

B. WORK INSTRUCTIONS
Group 1:
WORK PACKAGE 1: NOSE CARGO DOOR CONTROL SWITCH CHANGE
1. RC - Change the nose cargo door control switch in accordance with FIGURE 1.
2. Change wire bundle W2572 in accordance with FIGURE 2.
3. RC - Do the Nose Cargo Door - Normal Operation procedure. Refer to 747-8 AMM 52-31-00 as
an accepted procedure. If any of the tests fail, accomplish corrective actions and repeat the test
and applicable corrective actions until the test is passed.
4. Put the airplane back to a serviceable condition.
WORK PACKAGE 2: FORWARD CARGO DOOR CONTROL SWITCH CHANGE
1. Open the following circuit breakers, circuit breaker collars, attach DO-NOT-CLOSE tags, and verify
system is in a zero energy state:
Power Distribution Center - Left Panel, P414
NAMELOCATIONNUMBER
CARGO DR-FWD LWRA21C00814
CARGO DR CONT-FWDF15C00285
FWD CAR LIGHTC25C00612
2. Remove and keep forward lower lobe cargo compartment sidewall and ceiling linings 122CW,
122DW, 122AC, 122BC, 122CC, and 122DC. Refer to 747-8 AMM 25-52-01 as an accepted
procedure.
3. Insulation blankets can be removed and kept for access. Refer to 747-8 AMM 25-80-00 as an
accepted procedure.
4. Open forward cargo door control switch access door 122AR.
5. RC - Remove forward cargo door control switch in accordance with FIGURE 3.
6. Remove existing forward cargo door control switch pan assembly (assy) in accordance with FIGURE
4.
7. Install new forward cargo door control switch pan assy in accordance with FIGURE 5.
8. Remove resistor R2331 from the P86 panel in accordance with FIGURE 6.
9. Change wire bundle W0136 in accordance with FIGURE 7.
10. Change wire bundle W0572 in accordance with FIGURE 8.
11. Change wire bundle W1092 in accordance with FIGURE 9.
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### Page 40

12. Route wire bundles W0572 and W1092 in accordance with FIGURE 10.
13. RC - Install new forward cargo door control switches in accordance with FIGURE 11.
14. Install switch and markers in accordance with FIGURE 12.
15. Group 1-2:
Change the forward cargo door control markers in accordance with FIGURE 13.
16. Group 3:
Change the forward cargo door control markers in accordance with FIGURE 14.
17. Install kept insulation blankets. Refer to 747-8 AMM 25-80-00 as an accepted procedure.
18. Install kept forward lower lobe cargo compartment sidewall and ceiling linings 122CW, 122DW,
122AC, 122BC, 122CC, and 122DC. Refer to 747-8 AMM 25-52-01 as an accepted procedure.
19. Close the following circuit breakers, remove circuit breaker collars, and DO-NOT-CLOSE tags:
Power Distribution Center - Left Panel, P414
NAMELOCATIONNUMBER
CARGO DR-FWD LWRA21C00814
CARGO DR CONT-FWDF15C00285
FWD CAR LIGHTC25C00612
20. RC - Do the Forward Cargo Door - Open and Close the Door Electrically procedure for the forward
cargo door. Refer to 747-8 AMM 52-34-00 as an accepted procedure. If any of the tests fail,
accomplish corrective actions and repeat the test and applicable corrective actions until the test
is passed.
21. Pressurize the cabin and check for air leakage in the area of the changed cargo door control panel.
Refer to 747-8 AMM 05-51-08 as an accepted procedure.
22. Put the airplane back to a serviceable condition.
WORK PACKAGE 3: AFT CARGO DOOR CONTROL SWITCH CHANGE
1. Open the following circuit breakers, circuit breaker collars, attach DO-NOT-CLOSE tags, and verify
system is in a zero energy state:
Aft, Lower Cargo Equipment Panel, P59
NAMELOCATIONNUMBER
AFT CARGO DOOR PWR UNITS-C00815
EXT CAR AREA LTS-C00615
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### Page 41

Power Distribution Center - Left Panel, P414
NAMELOCATIONNUMBER
CARGO DR CONT-AFTF16C00288
2. Remove and keep aft lower lobe cargo compartment sidewall and ceiling linings 142KW, 142LW,
142EC, 142FC, 142GC, and 142HC. Refer to 747-8 AMM 25-52-01 as an accepted procedure.
3. Remove and keep insulation blankets as necessary. Refer to 747-8 AMM 25-80-00 as an accepted
procedure.
4. Open aft cargo door control switch access door 142AR.
5. RC - Remove the aft cargo door control switch in accordance with FIGURE 15.
6. Remove the aft cargo door control panel in accordance with FIGURE 16.
7. Change the aft cargo door control switch pan in accordance with FIGURE 17.
8. Remove resistor R2332 from the P59 panel in accordance with FIGURE 18.
9. Change wire bundle W0080 in accordance with FIGURE 19.
10. Change wire bundle W0574 in accordance with FIGURE 20.
11. Route wire bundle W0574 in accordance with FIGURE 21.
12. RC - Install new aft cargo door control switches in accordance with FIGURE 22.
13. Install switch and markers in accordance with FIGURE 23.
14. Group 1-2:
Change the aft cargo door control markers in accordance with FIGURE 24.
15. Group 3:
Change the aft cargo door control markers in accordance with FIGURE 25.
16. Install kept insulation blankets. Refer to 747-8 AMM 25-80-00 as an accepted procedure.
17. Install kept aft lower lobe cargo compartment sidewall and ceiling linings 142KW, 142LW, 142EC,
142FC, 142GC, and 142HC. Refer to 747-8 AMM 25-52-01 as an accepted procedure.
18. Close the following circuit breakers, remove circuit breaker collars, and DO-NOT-CLOSE tags:
Aft, Lower Cargo Equipment Panel, P59
NAMELOCATIONNUMBER
AFT CARGO DOOR PWR UNITS-C00815
EXT CAR AREA LTS-C00615
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### Page 42

Power Distribution Center - Left Panel, P414
NAMELOCATIONNUMBER
CARGO DR CONT-AFTF16C00288
19. RC - Do the Aft Cargo Door - Open and Close the Door Electrically procedure for the aft cargo
door. Refer to 747-8 AMM 52-34-00 as an accepted procedure. If any of the tests fail, accomplish
corrective actions and repeat the test and applicable corrective actions until the test is passed.
20. Pressurize the cabin and check for air leakage in the area of the changed cargo door control panel.
Refer to 747-8 AMM 05-51-08 as an accepted procedure.
21. Put the airplane back to a serviceable condition.
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### Page 43 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
This Figure applies only to: Group 1.
NOSE CARGO DOOR CONTROLS
112
LOCK-OUT  LATCHES  DOOR
ENGAGED  CLOSED  UP
CLOSED 0) OPEN
OFF/LOCK TEST  LAMP
SYSTEM POWER  TEST
OFF  ON
THRESHOLD  SIDEWALL  CEILING  NOSE SPOT LIGHT
LIGHT CONTROLS
NOSE DOOR AND LIGHT CONTROL MODULE, H121
FIGURE 1: NOSE CARGO DOOR CONTROL SWITCH CHANGE
(SHEET 1 OF 2)
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### Page 44

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
Equipment ID
S1161. Refer to 747-
8 AMM 52-31-17 as
an accepted proce-
dure.
1284U7410-1SWITCHRemove1
Equipment ID
S1161. Refer to 747-
8 AMM 52-31-17 as
an accepted proce-
dure.
1MS24524-27SWITCH, TOGGLEInstall (New)2
FIGURE 1: NOSE CARGO DOOR CONTROL SWITCH CHANGE
(SHEET 2 OF 2)
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### Page 45 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
This Figure applies only to: Group 1.
W2572
- 037-20
038-20
040-20
OPEN
52-31-14
012-20 1
019-201
3  013-20  020-201  10
D6140J  S1161  ARM CLOSED  -3  S1162
52-31-14
S1160
H121(YEY) NOSE DOOR CONTROL AND LIGHTS STA 275, WL 240, LBL 80
ADDED WIRE OR NEW ROUTING
+ DELETED WIRE OR FORMER ROUTING
EXISTING WIRE  FLAG NOTE  2500383
REFERENCE: 747-8 WDM 52-31-14
The flag note numbers shown below agree with the numbers shown in the flag symbols in the figure.
Flag
Note  Name  Identification  Qty  More Data
1  WIRE  BMS13-48T10C01G020  7  (a)
LACING TAPE - WHITE -  829A9001-1  (a)
PRESSURIZED (TEMP 135
DEG)
2  TERMINAL  BACT12AR202  4  Refer to SWPM 20-30-11 as an
accepted procedure.
TERMINAL, LUG  BACT12AC6  2  Refer to SWPM 20-30-11 as an
accepted procedure.
FIGURE 2: NOSE CARGO DOOR AND LIGHT CONTROL MODULE, H121 - WIRE BUNDLE W2572 CHANGE
(SHEET 1 OF 2)
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### Page 46

More DataQtyIdentificationName
Flag
Note
-3BACC47CN1SCONTACT, PIN4
(a) Refer to SWPM 20-30-11 as
an accepted procedure.
2BACT12AC2TERMINAL, LUG5
(a) Imprint: D06140J M/W
D06140P H121 (W7252).
1BACT19C-TTAPE, ID6
(a) Only required if existing wire will be too short for re-termination.
FIGURE 2: NOSE CARGO DOOR AND LIGHT CONTROL MODULE, H121 - WIRE BUNDLE W2572 CHANGE
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1 May 02, 2018
46 of 123
BOEING SERVICE BULLETIN 747-52-2307

### Page 47 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
STA
540
S-35R
S-36R
FWD
FORWARD CARGO DOOR CONTROL SWITCH
2566523
FIGURE 3: FORWARD CARGO DOOR CONTROL SWITCH REMOVAL
(SHEET 1 OF 2)
Original Issue: May 23, 2017
Revision 1 May 02, 2018  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING
Work - See page 1 for details.  EZLO LD

### Page 48

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
Equipment ID M710.1284U7410-1SWITCHRemove1
FIGURE 3: FORWARD CARGO DOOR CONTROL SWITCH REMOVAL
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1 May 02, 2018
48 of 123
BOEING SERVICE BULLETIN 747-52-2307

### Page 49 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
STA
540
S-35R
===/==:
4 LOCATIONS
4 LOCATIONS
LIGHT
ON
LATCHES
CLOSED
S-36R
FORWARD CARGO DOOR
CONTROL SWITCH
FWD
FIGURE 4: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY REMOVAL
(SHEET 1 OF 4)
Original Issue: May 23, 2017
Revision 1 May 02, 2018  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING
Work - See page 1 for details.  49 of 123

### Page 50 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
S-35R
DOUBLER
S-36R
INBD
A-A  2506482
FIGURE 4: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY REMOVAL
(SHEET 2 OF 4)
Original Issue: May 23, 2017
Revision 1 May 02, 2018  Export Controlled ECCN: 9E991 - BOEING  747-52-2307
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  50 of 123

### Page 51 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
S-35R
DÖUBLER
S-36R
INBD
B-B  2508245
FIGURE 4: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY REMOVAL
(SHEET 3 OF 4)
Original Issue: May 23, 2017
Revision 1 May 02, 2018  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  747-52-2307
Work - See page 1 for details.  51 of 123

### Page 52

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
Equipment ID L56971112-12GPINDICATOR LIGHT
ASSY
Remove1
Equipment ID S1431MS24523-22SWITCHRemove / Keep2
Remove all attach-
ing fasteners.
169B47815-7SUPPORT PANELRemove3
-16BACR15BBFASTENERRemove4
Remove the clip
common to the
stringer and the stiff-
ener.
4-CLIPRemove / Keep
Remove all attach-
ing fasteners.
2-STIFFENERRemove / Keep5
-4-SHIMRemove6
If present.4-SHIMRemove7
Refer to SWPM 20-
10-20 as an accept-
ed procedure.
2-SEALRemove8
Remove all attach-
ing fasteners.
1-PAN ASSYRemove9
FIGURE 4: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY REMOVAL
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1 May 02, 2018
52 of 123
BOEING SERVICE BULLETIN 747-52-2307

### Page 53 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
STA
540
PAN ASSEMBLY
CLIP
•
S-35R
SHIM
(4 LOCATIONS)  АД .  + +
FILLER
(4 LOCATIONS)
STIFFENER  STIFFENER
1 3
AN +  #+ AN
32 LOCATIONS
S-36R
CLIP  • B  CLIP
FORWARD CARGO DOOR
CONTROL SWITCH PAN
2506510
FIGURE 5: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY INSTALLATION
(SHEET 1 OF 5)
Original Issue: May 23, 2017
Revision 1 May 02, 2018  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  747-52-2307
Work - See page 1 for details.  53 of 123

### Page 54 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
S-35R
CLIP  STIFFENER  PAN ASSEMBLY
SHIM
(4) 6)
FILLER
BRACKET
CLIP
FILLER  S-36R
SHIM
A-A  2506488
FIGURE 5: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY INSTALLATION
(SHEET 2 OF 5)
Original Issue: May 23, 2017
Revision 1 May 02, 2018  Export Controlled ECCN: 9E991 - BOEING  PROPRIETARY - Copyright © Unpublished  747-52-2307
Work - See page 1 for details.  54 of 123

### Page 55 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
S-35R
CLIP
STIFFENER
PAN ASSEMBLY
0340  ~ SHIM
FILLER
BRACKET
FILLER
S-36R
SHIM
INBD
B-B
2506761
FIGURE 5: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY INSTALLATION
(SHEET 3 OF 5)
Original Issue: May 23, 2017
Revision 1 May 02, 2018  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  747-52-2307
Work - See page 1 for details.  55 of 123

### Page 56

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
Pick up existing fas-
tener holes in pan
assy to aid in locat-
ing.
165B23264-4PAN ASSYPut / Hold1
-4BACF3F011L011NNFILLER, FLATPut / Hold
(a)(b)(c)4BACS40R007E010FSHIM,LAMINATEDPut / Hold
-265B07309STIFFENERPut / Hold
-4-CLIPPut / Hold
All fastener holes
common to pan as-
sy, fillers, and shims.
--FASTENER HOLEDrill / Ream2
-265B07309STIFFENERRemove / Keep3
-4BACF3F011L011NNFILLER, FLATRemove
-4BACS40R007E010FSHIM,LAMINATEDRemove
-165B23264-4PAN ASSYRemove
-4-CLIPRemove / Keep
Fay seal with BMS5-
95. Refer to SOPM
20-50-19 as an ac-
cepted procedure.
-BMS5-95SEALANTApply4
(d)-EC-3587FAIRING COMPOUNDApply5
(e)165B23264-4PAN ASSYInstall (New)6
-4BACF3F011L011NNFILLER, FLATInstall (New)
-4BACS40R007E010FSHIM,LAMINATEDInstall (New)
-265B07309STIFFENERInstall (Kept)
-4-CLIPInstall (Kept)
(a) Remove 0.003 laminations as required. Maximum allowable gap after shimming and before fastener pull-
up is 0.010 inches.
(b) Apply chemical conversion coating after delamination. Refer to SOPM 20-43-03 as an accepted procedure.
(c) Apply BMS 10-11, TYPE I primer to restore protective finish. Refer to SOPM 20-41-02 as an accepted
procedure.
(d) Apply EC-3587 fairing compound along all four sides of pan. Refer to SOPM 20-50-19 as an accepted
procedure. BMS5-95 is an approved equivalent.
FIGURE 5: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY INSTALLATION
(SHEET 4 OF 5)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1 May 02, 2018
56 of 123
BOEING SERVICE BULLETIN 747-52-2307

### Page 57

More DataQtyIdentificationNameTaskStep
(e) Apply BMS3-23 Organic Corrosion Inhibiting Compound to brackets and internal surfaces of pan. Refer
to SOPM 20-41-05 as an accepted procedure.
More DataHole DiaQtyIdentificationNameCode
(a)(b)(c)0.216-0.21932BACB30NW6K()YBOLT, 100 DEG HEX
DR
A
(c)-32BACC30R6COLLAR
(a)(c)0.128-0.13516BACR15BB4D4CRIVETB
Optional to rivet. (a)(b)(c)0.161-0.16416BACB30VT5HK2BOLT, PROTRUDING
HD
Optional to rivet. (c)-16BACC30BL5COLLAR, SHEAR
(a) Deburr all fastener holes.
(b) Install fasteners wet with BMS5-95. Refer to SOPM 20-50-19 as an accepted procedure.
(c) It is acceptable to install the same diameter fastener as removed only if the existing fastener hole diameter
meets size limits in accordance with 747-8 SRM 51-40-02.
FIGURE 5: FORWARD CARGO DOOR CONTROL SWITCH PAN ASSY INSTALLATION
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1 May 02, 2018
57 of 123
BOEING SERVICE BULLETIN 747-52-2307

### Page 58 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
FORWARD
CARGO DOOR
P86 PANEL
B
INBD  2508276
A-A
FIGURE 6: P86 PANEL - RESISTOR R2331 REMOVAL
(SHEET 1 OF 3)
Original Issue: May 23, 2017
Revision 1 May 02, 2018  Export Controlled ECCN: 9E991 - BOEING  747-52-2307
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.  58 of 123

### Page 59 (OCR)

BOEING SERVICE BULLETIN 747-52-2307
4 5 6 7 8 9 10 11 12 13
INBD
B-B
2508563
FIGURE 6: P86 PANEL - RESISTOR R2331 REMOVAL
(SHEET 2 OF 3)
Original Issue: May 23, 2017
Revision 1 May 02, 2018  PROPRIETARY - Copyright © Unpublished  Export Controlled ECCN: 9E991 - BOEING  747-52-2307
Work - See page 1 for details.  59 of 123

### Page 60

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
-269B40800-5SPACERRemove1
-169B40800-6TERMINAL ASSEM-
BLY
Remove
-169B40800-83RESISTOR ASSEM-
BLY
Remove
(a)1-MARKERRemove
(a) Refer to 747-8 AMM 20-11-08 as an accepted procedure.
FIGURE 6: P86 PANEL - RESISTOR R2331 REMOVAL
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991 - BOEING
PROPRIETARY - Copyright © Unpublished
Work - See page 1 for details.
Original Issue: May 23, 2017
747-52-2307Revision 1 May 02, 2018
60 of 123
BOEING SERVICE BULLETIN 747-52-2307

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