# Boeing Alert Service Bulletin 747-28A2280: Revision 1

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### Page 1

Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 1 of 1162
 
 
 
Commercial
Airplanes
747
Service Bulletin
Number: 747-28A2280
Original Issue: August 07, 2008
Revision 1: November 25, 2009
ATA System: 2831
SUBJECT: FUEL - Fuel Jettison System - Center Tank Override/Jettison Fuel Pumps - Main 2 and 
Main 3 Tank Override/Jettison Fuel Pumps - Change to Give Redundant Control of the 
Fuel Pumps
BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET
Copyright © 2008 The Boeing Company
Unpublished Work - All Rights Reserved
Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable 
subject matter.  Boeing also claims copyright in this document as a compilation and/or collective work.
This document includes proprietary information owned by The Boeing Company and/or one or more third 
parties.  Treatment of the document and the information it contains is governed by contract with Boeing.  For 
more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.
Boeing, 707, 717, 727, 737, 747, 757, 767, 777, BBJ, BOEING BUSINESS JET, DC-8, DC-9, DC-10, MD-10, 
MD-11, MD-80, MD-90, the Boeing logo and the Boeing livery are among the trademarks owned by Boeing or 
its subsidiaries. No intellectual property license (express or implied) is granted in connection with this document 
or otherwise.

### Page 2

BLANK PAGE
Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 2 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
BLANK PAGE

### Page 3

Table of Contents
Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 3 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
Table of Contents
Revision Transmittal Sheet .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  11
Summary .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  13
1. PLANNING INFORMATION .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  17
A. Effectivity .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  17
1. Airplanes   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  17
2. Spares Affected .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  46
B. Concurrent Requirements  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   .  46
C. Reason .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  47
D. Description .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  48
E. Compliance.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   .  .  .  .  48
F. Approval .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  49
G. Manpower   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   .  .  .  .  49
H. Weight and Balance Changes  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  50
I. Electrical Load Data  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   .  .  .  50
J. References .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   .  .  .  .  51
1. Existing Data: .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  51
2. Data supplied with this Service Bulletin:   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  51
3. Installation Drawings Used in the Preparation of this Service Bulletin: .  .  .  .  .  .  .  .  .  .  52
K. Publications Affected .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  53
L. Interchangeability and Intermixability of Parts  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  53
2. MATERIAL INFORMATION .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  55
A. Material - Price and Availability.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  55
B. Industry Support Information .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   .  61
C. Parts Necessary For Each Airplane  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  61
1. Kits/Parts: .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  61
2. Parts and Materials Supplied by the Operator:  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 251
3. Parts Modified and Reidentified:   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 251
4. Parts Removed and Not Replaced: .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 251
D. Parts Necessary to Change Spares  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 251
E. Special Tooling - Price and Availability.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 252
F. Special Tooling Necessary to do this Service Bulletin .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 252
3. ACCOMPLISHMENT INSTRUCTIONS .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 253
A. GENERAL INFORMATION   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 253
B. WORK INSTRUCTIONS .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2 54
FIGURE  1: P914 RELAY PANEL SUPPORT BRACKET - INSTALLATION.  .  .  .  .  .  .  .  .  .  .  .  .  .  . 397
FIGURE  2: P915 RELAY PANEL SUPPORT BRACKET - INSTALLATION.  .  .  .  .  .  .  .  .  .  .  .  .  .  . 401
FIGURE  3: MAIN EQUIPMENT CENTER - P914 RELAY PANEL - INSTALLATION .  .  .  .  .  .  .  .  .  . 405
FIGURE  4: MAIN EQUIPMENT CENTER - P915 RELAY PANEL - INSTALLATION .  .  .  .  .  .  .  .  .  . 409
FIGURE  5: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 413
FIGURE  6: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 419
FIGURE  7: MAIN EQUIPMENT CENTER - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 425
FIGURE  8: MAIN EQUIPMENT CENTER - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 454
FIGURE  9: MAIN EQUIPMENT CENTER - P414-1 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  . 486
FIGURE  10: MAIN EQUIPMENT CENTER - P414 PANEL - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  . 489
FIGURE  11: MAIN EQUIPMENT CENTER - P414 PANEL - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  . 494

### Page 4

Table of Contents
Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 4 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
FIGURE  12: MAIN EQUIPMENT CENTER - P414 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  499
FIGURE  13: MAIN EQUIPMENT CENTER - P414 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  504
FIGURE  14: MAIN EQUIPMENT CENTER - P415-1 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  509
FIGURE  15: MAIN EQUIPMENT CENTER - P415 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  512
FIGURE  16: MAIN EQUIPMENT CENTER - P415 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  517
FIGURE  17: MAIN EQUIPMENT CENTER - P414 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  522
FIGURE  18: MAIN EQUIPMENT CENTER - P415 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  527
FIGURE  19: MAIN EQUIPMENT CENTER - P415 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  532
FIGURE  20: MAIN EQUIPMENT CENTER - P414 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  537
FIGURE  21: MAIN EQUIPMENT CENTER - P180 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  542
FIGURE  22: MAIN EQUIPMENT CENTER - P180 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  546
FIGURE  23: MAIN EQUIPMENT CENTER - P414 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  550
FIGURE  24: MAIN EQUIPMENT CENTER - E2-6 SHELF - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  555
FIGURE  25: MAIN EQUIPMENT CENTER - E2-6 SHELF - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  558
FIGURE  26: MAIN EQUIPMENT CENTER - E2-6 SHELF - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  561
FIGURE  27: MAIN EQUIPMENT CENTER - E2-6 SHELF - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  564
FIGURE  28: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  567
FIGURE  29: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  569
FIGURE  30: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  571
FIGURE  31: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  573
FIGURE  32: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE .  .  .  .  .  .  .  575
FIGURE  33: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE .  .  .  .  .  .  .  577
FIGURE  34: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE .  .  .  .  .  .  .  579
FIGURE  35: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE .  .  .  .  .  .  .  581
FIGURE  36: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE .  .  .  .  .  .  .  586
FIGURE  37: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   589
FIGURE  38: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   591
FIGURE  39: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   593
FIGURE  40: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   595
FIGURE  41: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   597
FIGURE  42: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   598
FIGURE  43: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   599
FIGURE  44: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   600
FIGURE  45: OVERRIDE/JETTISON PUMPS - WIRING CHANGES   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  602
FIGURE  46: OVERRIDE/JETTISON PUMPS - WIRING CHANGES   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  604
FIGURE  47: OVERRIDE/JETTISON PUMPS - WIRING CHANGES   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  605
FIGURE  48: OVERRIDE/JETTISON PUMPS - WIRING CHANGES   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  607
FIGURE  49: OVERRIDE/JETTISON PUMPS - WIRING CHANGES   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  609
FIGURE  50: OVERRIDE/JETTISON PUMPS - WIRING CHANGES   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  611

### Page 5

Table of Contents
Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 5 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
FIGURE  51: OVERRIDE/JETTISON PUMPS - MAIN 2 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 612
FIGURE  52: OVERRIDE/JETTISON PUMPS - MAIN 2 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 614
FIGURE  53: OVERRIDE/JETTISON PUMPS - MAIN 2 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 616
FIGURE  54: OVERRIDE/JETTISON PUMPS - MAIN 2 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 618
FIGURE  55: OVERRIDE/JETTISON PUMPS - MAIN 2 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 620
FIGURE  56: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 622
FIGURE  57: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 624
FIGURE  58: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 626
FIGURE  59: OVERRIDE/JETTISON PUMPS - MAIN 2 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 628
FIGURE  60: OVERRIDE/JETTISON PUMPS - MAIN 2 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 630
FIGURE  61: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 632
FIGURE  62: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 634
FIGURE  63: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 636
FIGURE  64: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 638
FIGURE  65: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGES   .  .  .  .  .  .  .  .  .  . 640
FIGURE  66: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGES.  .  .  .  .  .  . 642
FIGURE  67: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGES.  .  .  .  .  .  . 645
FIGURE  68: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGES.  .  .  .  .  .  . 651
FIGURE  69: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGES.  .  .  .  .  .  . 653
FIGURE  70: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGES.  .  .  .  .  .  . 655
FIGURE  71: OVERRIDE/JETTISON PUMPS - WIRING CHANGES  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 657
FIGURE  72: OVERRIDE/JETTISON PUMPS - WIRING CHANGES  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 659
FIGURE  73: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGES.  .  .  .  .  .  . 661
FIGURE  74: FUEL JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 663
FIGURE  75: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE   .  .  .  .  .  .  . 665
FIGURE  76: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE   .  .  .  .  .  .  . 667
FIGURE  77: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE   .  .  .  .  .  .  . 669
FIGURE  78: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE   .  .  .  .  .  .  . 671
FIGURE  79: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE   .  .  .  .  .  .  . 673
FIGURE  80: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6 7 5
FIGURE  81: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6 7 6
FIGURE  82: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6 7 7
FIGURE  83: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6 7 9
FIGURE  84: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6 8 1
FIGURE  85: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6 8 2
FIGURE  86: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6 8 3
FIGURE  87: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6 8 4
FIGURE  88: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6 8 5

### Page 6

Table of Contents
Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 6 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
FIGURE  89: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   686
FIGURE  90: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   687
FIGURE  91: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   688
FIGURE  92: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   689
FIGURE  93: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   690
FIGURE  94: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   691
FIGURE  95: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   692
FIGURE  96: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   693
FIGURE  97: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  694
FIGURE  98: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  696
FIGURE  99: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  698
FIGURE  100: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  700
FIGURE  101: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  702
FIGURE  102: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  704
FIGURE  103: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  706
FIGURE  104: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  708
FIGURE  105: FUEL JETTISON PUMPS - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  710
FIGURE  106: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE  .  .  .  .  .  .  711
FIGURE  107: FUEL JETTISON PUMPS - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  713
FIGURE  108: FUEL JETTISON PUMPS - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  715
FIGURE  109: FUEL JETTISON PUMPS - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  717
FIGURE  110: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  718
FIGURE  111: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  720
FIGURE  112: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  722
FIGURE  113: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  724
FIGURE  114: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  728
FIGURE  115: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  730
FIGURE  116: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  732
FIGURE  117: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  736
FIGURE  118: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  741
FIGURE  119: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  746
FIGURE  120: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  751
FIGURE  121: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  756
FIGURE  122: FUEL LOW PRESSURE WARNING - BOOSTER PUMPS - OVERRIDE/JETTISON PUMPS
- WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  761
FIGURE  123: FUEL LOW PRESSURE WARNING - BOOSTER PUMPS - OVERRIDE/JETTISON PUMPS
- WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  763
FIGURE  124: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   765

### Page 7

Table of Contents
Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
FIGURE  125: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .7 7 1
FIGURE  126: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .7 7 7
FIGURE  127: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .7 8 3
FIGURE  128: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .7 8 9
FIGURE  129: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .7 9 5
FIGURE  130: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 0 1
FIGURE  131: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 0 7
FIGURE  132: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 1 3
FIGURE  133: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 1 9
FIGURE  134: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 2 5
FIGURE  135: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 3 1
FIGURE  136: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 3 7
FIGURE  137: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 4 3
FIGURE  138: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 4 9
FIGURE  139: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 5 5
FIGURE  140: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 6 1
FIGURE  141: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 6 7
FIGURE  142: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 7 3
FIGURE  143: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 7 9
FIGURE  144: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 8 5
FIGURE  145: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 9 1
FIGURE  146: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8 9 7
FIGURE  147: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 903
FIGURE  148: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 904
FIGURE  149: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 905
FIGURE  150: OVERRIDE/JETTISON PUMPS - MAIN 2 AFT - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  . 906
FIGURE  151: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING

### Page 8

Table of Contents
Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 8 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   908
FIGURE  152: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   910
FIGURE  153: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   911
FIGURE  154: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   912
FIGURE  155: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   914
FIGURE  156: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   915
FIGURE  157: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   916
FIGURE  158: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   918
FIGURE  159: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   919
FIGURE  160: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   920
FIGURE  161: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   922
FIGURE  162: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   924
FIGURE  163: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   926
FIGURE  164: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   928
FIGURE  165: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   930
FIGURE  166: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   932
FIGURE  167: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   934
FIGURE  168: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  .  936
FIGURE  169: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  .  938
FIGURE  170: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  .  940
FIGURE  171: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  .  942
FIGURE  172: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  .  944
FIGURE  173: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  .  946
FIGURE  174: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  .  948
FIGURE  175: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  950
FIGURE  176: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  952
FIGURE  177: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  954
FIGURE  178: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  956
FIGURE  179: OVERRIDE/JETTISON PUMPS - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  958
FIGURE  180: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  .  960
FIGURE  181: FUEL LOW PRESSURE WARNING - BOOSTER PUMPS 1, 2 FWD - 3, 4 AFT - LEFT,
RIGHT OVERRIDE JETTISON - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  962

### Page 9

Table of Contents
Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
FIGURE  182: FUEL LOW PRESSURE WARNING - BOOSTER PUMPS 1, 2 FWD - 3, 4 AFT - LEFT,
RIGHT OVERRIDE JETTISON - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 964
FIGURE  183: FUEL LOW PRESSURE WARNING - JETTISON PUMPS - MAIN 2 AND 3 AFT - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .9 6 6
FIGURE  184: FUEL LOW PRESSURE WARNING - JETTISON PUMPS - MAIN 2 AND 3 AFT - WIRING
CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .9 6 7
FIGURE  185: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  . 968
FIGURE  186: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  . 970
FIGURE  187: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  . 972
FIGURE  188: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  . 974
FIGURE  189: OVERRIDE/JETTISON PUMPS - MAIN 3 AFT - WIRING CHANGE.  .  .  .  .  .  .  .  .  .  . 976
FIGURE  190: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 978
FIGURE  191: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 980
FIGURE  192: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 982
FIGURE  193: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 984
FIGURE  194: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 986
FIGURE  195: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 988
FIGURE  196: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 990
FIGURE  197: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 992
FIGURE  198: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 994
FIGURE  199: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 996
FIGURE  200: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 998
FIGURE  201: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1000
FIGURE  202: FUEL LOW PRESSURE WARNING - BOOSTER PUMPS 1, 2 FWD - 3, 4 AFT - LEFT,
RIGHT OVERRIDE JETTISON - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1002
FIGURE  203: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1004
FIGURE  204: OVERRIDE/JETTISON PUMPS - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1006
FIGURE  205: MAIN EQUIPMENT CENTER - P415 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  . 1008
FIGURE  206: MAIN EQUIPMENT CENTER - P415 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  . 1013
FIGURE  207: MAIN EQUIPMENT CENTER - E2-6 SHELF - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  . 1018
FIGURE  208: MAIN EQUIPMENT CENTER - E2-6 SHELF - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  . 1021
FIGURE  209: MAIN EQUIPMENT CENTER - P414 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  . 1024
FIGURE  210: FUEL LOW PRESSURE WARNING - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1029
FIGURE  211: FUEL LOW PRESSURE WARNING - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1030
FIGURE  212: FUEL LOW PRESSURE WARNING - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1031
FIGURE  213: FUEL LOW PRESSURE WARNING - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1032
FIGURE  214: FUEL LOW PRESSURE WARNING - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1033
FIGURE  215: FUEL LOW PRESSURE WARNING - WIRING CHANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1034
FIGURE  216: MAIN EQUIPMENT CENTER - P415 PANEL - WIRING CHANGE   .  .  .  .  .  .  .  .  .  . 1035
FIGURE  217: MAIN EQUIPMENT CENTER - LEFT SIDE - TERMINAL MODULE AND NUT SPACER -
INSTALLATION .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1040
FIGURE  218: MAIN EQUIPMENT CENTER - RIGHT SIDE - TERMINAL MODULE AND NUT SPACER -
INSTALLATION .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1044
FIGURE  219: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGES .  .  .  .  . 1048
FIGURE  220: FUEL JETTISON PUMPS - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1051
FIGURE  221: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE .  .  .  .  .  . 1053

### Page 10

Table of Contents
Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 10 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
FIGURE  222: FUEL JETTISON PUMPS - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1055
FIGURE  223: OVERRIDE/JETTISON PUMPS - MAIN 2 AFT - WIRING CHANGE .  .  .  .  .  .  .  .  .  . 1057
FIGURE  224: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1059
FIGURE  225: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1065
FIGURE  226: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1071
FIGURE  227: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1077
FIGURE  228: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1078
FIGURE  229: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1079
FIGURE  230: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1080
FIGURE  231: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1081
FIGURE  232: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1082
FIGURE  233: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1083
FIGURE  234: FUEL LOW PRESSURE WARNING - WIRING CHANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1084
FIGURE  235: MAIN EQUIPMENT CENTER - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1085
FIGURE  236: MAIN EQUIPMENT CENTER - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1114
FIGURE  237: MAIN EQUIPMENT CENTER - P414 PANEL - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  . 1142
FIGURE  238: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE  .  .  .  .  .  . 1147
FIGURE  239: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGES  .  .  .  .  . 1149
FIGURE  240: OVERRIDE/JETTISON PUMPS - WIRING CHANGES .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1151
FIGURE  241: OVERRIDE/JETTISON PUMPS - MAIN 3 FORWARD - WIRING CHANGE  .  .  .  .  .  . 1153
FIGURE  242: FUEL LOW PRESSURE WARNING - JETTISON PUMPS MAIN 2 AND 3 FWD - WIRING
CHANGE.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1155
FIGURE  243: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  . 1157
FIGURE  244: OVERRIDE/JETTISON PUMPS - MAIN 2 FORWARD - WIRING CHANGE  .  .  .  .  .  . 1159
FIGURE  245: MAIN EQUIPMENT CENTER - P415 PANEL - WIRING CHANGE .  .  .  .  .  .  .  .  .  .  . 1161

### Page 11

Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 11 of 1162
 
 
 
Commercial
Airplanes
747
Service Bulletin
Number: 747-28A2280 Revision Transmittal Sheet
Original Issue: August 07, 2008
Revision 1: November 25, 2009
ATA System: 2831
SUBJECT: FUEL - Fuel Jettison System - Center Tank Override/Jettison Fuel Pumps - Main 2 and 
Main 3 Tank Override/Jettison Fuel Pumps - Change to Give Redundant Control of the 
Fuel Pumps
This Revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION
No more work is necessary on airplanes changed as shown in the original issue of this service bulletin.
REASON FOR REVISION
As a part of a service bulletin validation program, this change was completed on airplane RM084 by Service 
Bulletin 747-28A2280 Original Issue before the release of Revision 1 of this service bulletin.  The change 
completed on airplane RM084 by Service Bulletin 747-28A2280 Original Issue is equivalent to the release of 
Revision 1 of this service bulletin.   Airplane RM084 has the configuration of a Group 131 airplane.
This revision is sent to update the wire diagrams and wire installation figures, include more information on 
access, and update the material information section because more wiring parts are needed to complete the 
change. Also more figures are needed to show the configuration of the validation airplane.
The effectivity group assignment for RM084 was changed from Group 2 to new Group 131 to show the correct 
wiring configuration for this airplane.
The following sections were changed:
1. In Summary, Planning Information, Material Information, Accomplishment Instructions, and all applicable 
figures, updated to specify the new group.
2. In Summary, and Planning Information, Paragraph 1.D., updated the access instructions.
3. In Material Information, Paragraph 2.A., updated the price and availability of the Top Kit.
4. In Material Information, Paragraph 2.C., updated the parts list.
5. In Accomplishment Instructions, Paragraph 3.A., added a note to follow the existing wire bundle routing 
when possible.
6. In Accomplishment Instructions, Paragraph 3.B., updated steps for ceiling panels and floor panels removal 
to specify stations.

### Page 12

Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 12 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
7. In Figure 1 and 2, revised step tables to show new fasteners for brackets.
8. In Figure 7, 8, 235, and 236, revised step tables to correct the separation code for W4727.
9. In Figure 7, 8, 235, and 236, revised step tables to include colored plastic tie straps as an alternative to 
lacing tape.
10. In Figure 51 - 55, added new flag notes for BACC47CP2S contact at DM7867 and updated quantity of 
BACC47CP1S contact. 
11. In Figure 67 - 70 and 73, revised illustrations to show M7869 on the left side.
12. In Figure 67 - 70, and 73, added new flag notes for BACC47CP2S contact at DM7869 and updated quantity 
of BACC47CP1S contact. 
13. In Figure 76 - 79, added new flag notes for BACC47CP2S contact at DM7868 and updated quantity of 
BACC47CP1S contact. 
14. In Figure 186 - 189, added new flag notes for BACC47CP2S contact at DM7866 and updated quantity of 
BACC47CP1S contact. 
15. In Figure 187, revised illustration to show wire W4748-012-20 termination at SP14401.
16. In Figure 217 and 218, revised step tables to specify ground ID labels.
17. Added 6 new figures for new group 131 to show new wire positions and terminations for connector 
D40280P.  
18. Added 2 new figures for new group 131 to show new wire positions for connector D40368P.
19. Added 1 new figure to install hardware for new receptacle connectors and updated Accomplishment 
Instructions to include the new figure.
The data given in Information Notice 747-28-2280 IN 01 is included in this revision with one exception. In Figures 
113, 116, 117, 118, 119, 120, 121, the wires W3942-8FE, W3942-8FF, and W3942-8FH are specified as size 
20 wire but they are size 22 wire. This statement in IN 01 is incorrect and the wire size should be size 20.
Paragraph 1.A., Effectivity, shows changes of airplane operators.  Each operator should examine the Effectivity 
paragraph for changes.
Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location 
of important changes.
Pages with no vertical lines have no important changes.
REVISION HISTORY
Original Issue August 07, 2008
Revision 1: November 25, 
2009

### Page 13

Original Issue: August 07, 2008
Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 13 of 1162
 
 
 
Commercial
Airplanes
747
Service Bulletin
Number: 747-28A2280 Summary
Original Issue: August 07, 2008
Revision 1: November 25, 2009
ATA System: 2831
SUBJECT: FUEL - Fuel Jettison System - Center Tank Override/Jettison Fuel Pumps - Main 2 and 
Main 3 Tank Override/Jettison Fuel Pumps - Change to Give Redundant Control of the 
Fuel Pumps
CONCURRENT REQUIREMENTS
Refer to Paragraph 1.B  for the list of concurrent requirements.
BACKGROUND
Accomplishment of the changes in this service bulletin will help prevent an ignition source in a fuel tank as a 
result of a override/jettison fuel pump that continues to run after it has been commanded OFF.  An ignition 
source in a fuel tank could result in a fire or an explosion.  
A safety assessment conducted by Boeing under Special Federal Aviation Regulation (SFAR) 88, "Fuel Tank 
System Fault Tolerance Evaluation Requirements" indicates that there is a small risk of an ignition source in a 
fuel tank if a override/jettison fuel pump continues to run for an extended time after fuel level goes below the 
pump inlet.  When the Engine Indicating and Alert System (EICAS) status message "FUEL TANK/ENGINE" is 
received (all main tanks are equal), the inboard main override/jettison pumps are normally commanded off.  
When the fuel quantity in the center tank goes below the specified weight, the center override/jettison pumps 
are normally commanded off.  However, if a single failure in the pump control circuitry occurs, a pump can 
continue to run after it is commanded off.  When a pump runs after the fuel level goes below the pump inlet, 
there is a small risk that the pump can cause an ignition source in the fuel tank from an overheat condition, 
electrical arcs or frictional sparks.   
This service bulletin gives the instructions to install new pump control relays and time delay relays in the circuitry 
for the center fuel tank override/jettison fuel pumps and the main fuel tank override/jettison fuel pumps.  The 
new pump control relays provide a redundant power control if a failure of the existing relays occurs.  The new 
time delay relays do an automatic shutoff of the override/jettison fuel pumps in the center tank or the main tank 
15 seconds after a low pressure indication. The time delay relays provide redundant power control if a failure of 
a flight deck switch in the on position occurs.  Each set of relays have a new EICAS status message to 
annunciate a fault in a pump control relay.  For the center tank, the EICAS status messages are "FUEL CMD 
CTR L" and "FUEL CMD CTR R".  For the main tank, the EICAS status messages are "FUEL CMD OVD 2" and 
"FUEL CMD OVD 3".   These messages are enabled by a fuels pseudo hardware program pin on the Electronic 
Flight Indication System (EFIS)/EICAS Interface Units (EIU).  These changes help make sure that the risk of an 
ignition source in a fuel tank is kept to a minimum.  The changes are identical to the changes to airplanes in 
production.

### Page 14

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BOEING SERVICE BULLETIN 747-28A2280
 
 
This change affects Section 9 of the 747-400 Maintenance Planning Data (MPD) document.  New Airworthiness 
Limitations (AWL) "28-AWL-26" will be added to Section 9 of the MPD to include an operational test of the 
uncommanded on system for the override/jettison fuel pumps in the main 2 and main 3 fuel tanks.
ACTION (PRR 85539-8)
Group  1-2, 5-10, 12-28, 30, 32-47, 49-71, 75-115, 117-120, 123-131: Get access to the main equipment center.  
Get access to the wire bundles in the ceiling from station 400 to station 970 in the forward cargo compartment 
on the right and left sides.  Get access to the wiring below the floor panels from station 900 to station 1200 to 
the AL1201 and AL1202 disconnect brackets in the passenger cabin on the right and left sides.  Install the new 
P914 panel assembly on the left side of the airplane.  Install the new P915 panel assembly on the right side of 
the airplane.  Change the airplane wiring.  Do a functional test.  Close access.
Group  121-122: Get access to the main equipment center.  Install the new P914 panel assembly on the left side 
of the airplane.  Install the new P915 panel assembly on the right side of the airplane.  Change the airplane 
wiring.  Do a functional test.  Close access.
Group  3-4, 11, 29, 31, 48, 72-74, 116: Get access to the main equipment center.  Get access to the wire bundles 
in the ceiling from station 400 to station 970 in the forward cargo compartment on the right and left sides.  Get 
access to the wiring below the floor panels from station 900 to station 1200 to the AL1201 and AL1202 
disconnect brackets on the main deck on the right and left sides.  Get access to the AF0314 disconnect bracket 
on the right side wall in the cargo compartment on the main deck.  Install the new P914 panel assembly on the 
left side of the airplane.  Install the new P915 panel assembly on the right side of the airplane.  Change the 
airplane wiring.  Do a functional test.  Close access.
Boeing Service Bulletin 747-28-2145 and 747-28-2149 have some wiring changes that are related to the wiring 
changes in this service bulletin.
EFFECTIVITY
747-400/-400D/-400F Airplanes.  Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes.
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.
Boeing recommends that this service bulletin be incorporated within 60 months after the original issue date of 
this service bulletin.
INDUSTRY SUPPORT INFORMATION
Boeing warranty remedies are not available for the configuration changes given in this service bulletin.

### Page 15

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BOEING SERVICE BULLETIN 747-28A2280
 
 
MANPOWER
MATERIAL INFORMATION
Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
Airplanes Total Task Hours Elapsed Hours
Group  1-2, 5-10, 12-28, 30, 32-47, 49-71, 75-115, 
117-120, 123-131:
409.50 109.75
Group  3-4, 11, 29, 31, 48, 72-74, 116, 121-122: 383.50 101.75

### Page 16

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BOEING SERVICE BULLETIN 747-28A2280
 
 
FWD
MAIN EQUIPMENT CENTER
FWD
UP
INSTALL NEW P914 AND P915
PANELS AND CHANGE A/P
WIRING.
P415-1 OR P415
AUXILIARY PANEL
P414-1 OR P414
AUXILIARY PANEL
1309606

### Page 17

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Commercial
Airplanes
747
Service Bulletin
Number: 747-28A2280
Original Issue: August 07, 2008
Revision 1: November 25, 2009
ATA System: 2831
SUBJECT: FUEL - Fuel Jettison System - Center Tank Override/Jettison Fuel Pumps - Main 2 and 
Main 3 Tank Override/Jettison Fuel Pumps - Change to Give Redundant Control of the 
Fuel Pumps
1. PLANNING INFORMATION
A. Effectivity
1. Airplanes
This service bulletin is for the airplanes shown below.  An equivalent change is on subsequent 
production airplanes.  Refer to PRR 85539-8 for data about this change.
GROUP CONFIGURATION DESCRIPTION
1 - 747-400 airplanes with different wiring 
configurations
2 - 747-400 airplanes with different wiring 
configurations
3 - 747-400F airplanes with different wiring 
configurations
4 - 747-400F airplanes with different wiring 
configurations
5 - 747-400 airplanes with different wiring 
configurations
6 - 747-400 airplanes with different wiring 
configurations
7 - 747-400 airplanes with different wiring 
configurations
8 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145

### Page 18

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BOEING SERVICE BULLETIN 747-28A2280
 
 
9 - 747-400D airplanes with different wiring 
configurations
10 - 747-400 airplanes with different wiring 
configurations
11 - 747-400F airplanes with different wiring 
configurations
12 - 747-400 airplanes with different wiring 
configurations
13 - 747-400 airplanes with different wiring 
configurations
14 - 747-400 airplanes with different wiring 
configurations
15 - 747-400 airplanes with different wiring 
configurations
16 - 747-400 airplanes with different wiring 
configurations
17 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
18 - 747-400 airplanes with different wiring 
configurations
19 - 747-400 airplanes with different wiring 
configurations
20 - 747-400 airplanes with different wiring 
configurations
21 - 747-400 airplanes with different wiring 
configurations
22 - 747-400 airplanes with different wiring 
configurations
GROUP CONFIGURATION DESCRIPTION

### Page 19

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BOEING SERVICE BULLETIN 747-28A2280
 
 
23 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
24 - 747-400 airplanes with different wiring 
configurations
25 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
26 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
27 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
GROUP CONFIGURATION DESCRIPTION

### Page 20

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BOEING SERVICE BULLETIN 747-28A2280
 
 
28 - 747-400 airplanes with different wiring 
configurations
29 - 747-400F airplanes with different wiring 
configurations
30 - 747-400 airplanes with different wiring 
configurations
31 - 747-400F airplanes with different wiring 
configurations
32 - 747-400 airplanes with different wiring 
configurations
33 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
34 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
35 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
GROUP CONFIGURATION DESCRIPTION

### Page 21

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BOEING SERVICE BULLETIN 747-28A2280
 
 
36 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
37 - 747-400 airplanes with different wiring 
configurations
38 - 747-400 airplanes with different wiring 
configurations
39 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
40 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
GROUP CONFIGURATION DESCRIPTION

### Page 22

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BOEING SERVICE BULLETIN 747-28A2280
 
 
41 - 747-400 airplanes with different wiring 
configurations
42 - 747-400 airplanes with different wiring 
configurations
43 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
44 - 747-400 airplanes with different wiring 
configurations
45 - 747-400 airplanes with different wiring 
configurations
46 - 747-400 airplanes with different wiring 
configurations
47 - 747-400 airplanes with different wiring 
configurations
48 - 747-400F airplanes with different wiring 
configurations
49 - 747-400 airplanes with different wiring 
configurations
50 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
51 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
52 - 747-400 airplanes with different wiring 
configurations
53 - 747-400 airplanes with different wiring 
configurations
GROUP CONFIGURATION DESCRIPTION

### Page 23

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BOEING SERVICE BULLETIN 747-28A2280
 
 
54 - 747-400 airplanes with different wiring 
configurations
55 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
56 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
57 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
58 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
59 - 747-400 airplanes with different wiring 
configurations
60 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
61 - 747-400 airplanes with different wiring 
configurations
GROUP CONFIGURATION DESCRIPTION

### Page 24

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BOEING SERVICE BULLETIN 747-28A2280
 
 
62 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
63 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
64 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
65 - 747-400 airplanes with different wiring 
configurations
66 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
GROUP CONFIGURATION DESCRIPTION

### Page 25

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BOEING SERVICE BULLETIN 747-28A2280
 
 
67 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
68 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
69 - 747-400 airplanes with different wiring 
configurations
70 - 747-400 airplanes with different wiring 
configurations
71 - 747-400 airplanes with different wiring 
configurations
72 - 747-400F airplanes with different wiring 
configurations
73 - 747-400F airplanes with different wiring 
configurations
74 - 747-400F airplanes with different wiring 
configurations
75 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
76 - 747-400 airplanes with different wiring 
configurations
GROUP CONFIGURATION DESCRIPTION

### Page 26

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BOEING SERVICE BULLETIN 747-28A2280
 
 
77 - 747-400 airplanes with different wiring 
configurations
78 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
79 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
80 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
GROUP CONFIGURATION DESCRIPTION

### Page 27

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BOEING SERVICE BULLETIN 747-28A2280
 
 
81 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
82 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
83 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
84 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
GROUP CONFIGURATION DESCRIPTION

### Page 28

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BOEING SERVICE BULLETIN 747-28A2280
 
 
85 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
86 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
87 - 747-400 airplanes with different wiring 
configurations
88 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
89 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
90 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
GROUP CONFIGURATION DESCRIPTION

### Page 29

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BOEING SERVICE BULLETIN 747-28A2280
 
 
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configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
92 - 747-400 airplanes with different wiring 
configurations
93 - 747-400 airplanes with different wiring 
configurations
94 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
95 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
GROUP CONFIGURATION DESCRIPTION

### Page 30

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Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 30 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
96 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
97 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
98 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
99 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
100 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
GROUP CONFIGURATION DESCRIPTION

### Page 31

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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 31 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
101 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
102 - 747-400 airplanes with different wiring 
configurations
103 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
104 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
105 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
GROUP CONFIGURATION DESCRIPTION

### Page 32

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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 32 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
106 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
107 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
108 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
109 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2145
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2145
3 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
4 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
110 - 747-400 airplanes with different wiring 
configurations
1 747-400 airplanes with different wiring 
configurations without the incorporation of 
Boeing Service Bulletin 747-28-2149
2 747-400 airplanes with different wiring 
configurations with the incorporation of Boeing 
Service Bulletin 747-28-2149
GROUP CONFIGURATION DESCRIPTION

### Page 33

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BOEING SERVICE BULLETIN 747-28A2280
 
 
Airplane models:
111 - 747-400 airplanes with different wiring 
configurations
112 - 747-400 airplanes with different wiring 
configurations
113 - 747-400 airplanes with different wiring 
configurations
114 - 747-400 airplanes with different wiring 
configurations
115 - 747-400 airplanes with different wiring 
configurations
116 - 747-400F airplanes with different wiring 
configurations
117 - 747-400 airplanes with different wiring 
configurations
118 - 747-400 airplanes with different wiring 
configurations
119 - 747-400 airplanes with different wiring 
configurations
120 - 747-400D airplanes with different wiring 
configurations
121 - 747-400 airplanes with different wiring 
configurations
122 - 747-400 airplanes with different wiring 
configurations
123 - 747-400 airplanes with different wiring 
configurations
124 - 747-400 airplanes with different wiring 
configurations
125 - 747-400 airplanes with different wiring 
configurations
126 - 747-400 airplanes with different wiring 
configurations
127 - 747-400 airplanes with different wiring 
configurations
128 - 747-400 airplanes with different wiring 
configurations
129 - 747-400 airplanes with different wiring 
configurations
130 - 747-400 and 747-400D airplanes with different 
wiring configurations
131 - 747-400 airplanes with different wiring 
configurations
GROUP CONFIGURATION DESCRIPTION

### Page 34

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BOEING SERVICE BULLETIN 747-28A2280
 
 
747-400 747-400D 747-400F
IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER
AEROLINEAS ARGENTINAS  (ARG)
100 RT702
102 RT704
99 RT701
AIR ATLANTA ICELANDIC  (AID)
106 RT751
123 RT515
AIR CHINA  (BEJ)
1R M 3 4 1
118 RT878–RT880
128 RT034–RT035
22 RM811–RM813
AIR CHINA CARGO  (CGC)
4 RL501–RL502
40 RT031–RT033
53 RT101
77 RT103
AIR FRANCE  (AFA)
103 RT711
104 RT712
117 RT074 RT713–RT716
129 RT121
2 RM401–RM403
21 RT073
29 RL671–RL673
3 RL674–RL675
52 RT071–RT072
76 RT075
94 RT591
AIR INDIA  (AIN)
118 RU001–RU006
AIR NEW ZEALAND  (ANZ)
101 RT703
124 RT932
17 RT671–RT672
2R M 0 8 2
47 RM191–RM192
6 RT673
AIR PACIFIC  (APC)
35 RT502 RT504

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BOEING SERVICE BULLETIN 747-28A2280
 
 
AIR PULLMANTUR  (PUL)
123 RT523 RT525
18 RT749
ALL NIPPON AIRWAYS  (ANA)
108 RT776
124 RT753–RT755
69 RT777
9 RU831 RU833–RU841
AMIRI FLIGHT  (ABD)
124 RT137
131 RM084
ASIANA AIRLINES  (AAR)
116 RR746–RR747
124 RT131–RT136 RU032
2R M 0 7 1
3 RM861–RM863
ATLAS AIR  (TLS)
107 RT752
116 RR748
3 RM891–RM899 RM901–RM906
AVION AIRCRAFT TRADING H.F.  (VNG)
123 RT633–RT634
9 RT756
BAHRAIN ROYAL FLIGHT  (BHR)
7R M 4 2 6
BRITISH AIRWAYS  (BAB)
1 RM096–RM097 RM136–RM145 RM261–RM264
10 RT490–RT499 RU121
111 RU123
112 RU132
113 RU126–RU131
119 RU122
15 RU124–RU125
60 RT486–RT487
61 RT488–RT489
8 RT471–RT485
CARGOLUX AIRLINES  (CLX)
11 RM881–RM889 RR723–RR724
48 RR721–RR722
72 RR701

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BOEING SERVICE BULLETIN 747-28A2280
 
 
CATHAY PACIFIC AIRWAYS  (CAT)
109 RT781
110 RT782
123 RT514 RT517 RT522 RT529
RT837
17 RT451–RT455
24 RT518 RT528
31 RM856–RM859
6 RT458–RT469
63 RT511–RT512
73 RR951
74 RR952
78 RT456
79 RT457
81 RT508
CHINA AIRLINES  (CHI)
1 RM021–RM024
123 RT636–RT640
29 RL430
3 RL411–RL429
30 RM441–RM443 RM445
CHINA CARGO  (CIQ)
3 RL521
CHINA SOUTHERN AIRLINES  (GUN)
4 RL751–RL752
CORSAIR  (COR)
123 RT613–RT614 RT616 RT618–RT619 RT621
DRAGONAIR  (DRG)
123 RT519
24 RT513 RT516
42 RT524
83 RT510
DUBAI AIR WING  (DAW)
1R M 1 6 7
5R M 1 6 8
53 RT102
EL AL ISRAEL AIRLINES  (ELA)
123 RT527
2R M 0 9 1
37 RU081–RU083
EVA AIR  (EVA)
124 RT162–RT163 RT165–RT168 RT951–RT955
2 RM116–RM117
3 RL401–RL403

### Page 37

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BOEING SERVICE BULLETIN 747-28A2280
 
 
EVERGREEN INTERNATIONAL A/L  (EVR)
121 RT631–RT632
122 RT876
37 RT743
EXPORT RESTRICTED AIRPLANES  (YWV)
123 RT620
36 RT606
96 RT602
GARUDA INDONESIA  (GIA)
124 RT931 RU061–RU062
GECAS  (GEF)
123 RT615 RT622
126 RT412
GOVERNMENT OF JAPAN  (JAG)
67 RT681–RT682
GRAND STAR  (GCG)
4 RR861
GREAT WALL AIRLINES  (GWL)
3R M 8 5 2
42 RT520
HIS MAJESTY THE SULTAN'S FLIGHT  (BWN)
12 RT440
JADE CARGO INTERNATIONAL  (JDE)
3 RL511
JAL INTERNATIONAL  (JAL)
114 RM130–RM132 RM317–RM318
120 RU801
13 RM126–RM129 RM316
130 RT652–RT654 RT966–RT967 RU802–RU809
26 RT641–RT645
27 RT646–RT650
28 RT861–RT864
3 RL461–RL462
44 RT655–RT657
97 RT651
KALITTA AIR  (KAC)
39 RT021–RT022
KINGDOM HOLDING COMPANY  (KBA)
118 RT877

### Page 38

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BOEING SERVICE BULLETIN 747-28A2280
 
 
KLM - ROYAL DUTCH AIRLINES  (KLM)
127 RT012–RT014
20 RM801–RM803
23 RT001–RT005
3 RL681–RL683
32 RT008–RT011
49 RT006–RT007
64 RT531–RT532
65 RT534–RT535
84 RT533
KOREAN AIR  (KAL)
1 RM011–RM013
123 RT577–RT588 RT590 RT811–RT814
4 RL451–RL456 RM871–RM880 RR862
75 RT061
88 RT571
89 RT572
90 RT573
91 RT574
92 RT575
93 RT576
KUWAIT AIRWAYS  (KUW)
54 RT151
LION AIR  (MLI)
35 RT503 RT505
LUFTHANSA GERMAN AIRLINES  (DLH)
12 RT439 RT441–RT447
16 RM001–RM007
34 RT433–RT436
41 RT045–RT047
50 RT041–RT042
51 RT043–RT044
58 RT431–RT432
59 RT437–RT438
MALAYSIA AIRLINES  (MAS)
124 RU017
18 RT744 RT746 RT748 RT750
2 RM036–RM040 RM366–RM367
28 RU016
4 RL491–RL492
MARTINAIR HOLLAND  (MTH)
62 RT506–RT507
80 RT501
82 RT509
NIPPON CARGO AIRLINES  (NCA)
3 RL471–RL473

### Page 39

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BOEING SERVICE BULLETIN 747-28A2280
 
 
NORTHWEST AIRLINES  (NWA)
14 RM241–RM246
33 RT407–RT410
55 RT401 RT406
56 RT402–RT403
57 RT404–RT405
OMAN ROYAL FLIGHT  (RFO)
7R M 0 1 0
PHILIPPINE AIRLINES  (PAL)
124 RU059
45 RU051–RU052 RU060
54 RT152
POLAR AIR CARGO  (PAO)
3 RL651–RL655
QANTAS  (QAN)
1 RM331–RM333
105 RT742
124 RU031
19 RF001–RF006
25 RT552–RT556
39 RT741
43 RT557–RT559
6 RT562–RT568
85 RT551
86 RT560
87 RT561
ROYAL AIR MAROC  (RAM)
9 RT717
SAUDI ARABIAN AIRLINES  (SVA)
2 RM156–RM157
71 RU101–RU102
SAUDI ROYAL FLIGHT  (SRF)
2R M 1 5 8
SIACARGO  (SIT)
3 RL431–RL436 RM851 RM853–RM855 RR851–RR856
SINGAPORE AIRLINES  (SIA)
1 RM041–RM045
123 RT521 RT831–RT835
24 RT526
42 RT530
SONAIR  (SON)
115 RM231–RM233

### Page 40

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BOEING SERVICE BULLETIN 747-28A2280
 
 
SOUTH AFRICAN AIRWAYS  (SAA)
38 RM081 RM083
46 RM147
THAI AIRWAYS INTERNATIONAL  (TII)
125 RT694–RT699 RT801–RT803
68 RT691–RT692
7 RM026–RM030 RM431
98 RT693
TRANSAERO AIRLINES  (TRX)
46 RM146
70 RT783–RT784
UNITED AIR LINES  (UAL)
1R M 1 6 6
123 RT609–RT612 RT617 RT623–RT630
126 RT411
36 RT605 RT607–RT608
5 RM169–RM177
66 RT603–RT604
95 RT601
UPS  (UPS)
124 RT161 RT164
US AIR FORCE  (USF)
3R M 9 1 1
VIRGIN ATLANTIC AIRWAYS  (VAA)
124 RT945–RT949
2 RM051–RM053 RM351–RM355
WORLD AIRWAYS, INC.  (WLD)
18 RT745 RT747
YANGTZE RIVER EXPRESS  (YTH)
9 RT757
IDENTIFICATION BY VARIABLE NUMBER
Variable  Group
RF001–RF006 19
RL401–RL403 3
RL411–RL429 3
RL430 29
RL431–RL436 3
RL451–RL456 4
RL461–RL462 3
RL471–RL473 3

### Page 41

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BOEING SERVICE BULLETIN 747-28A2280
 
 
RL491–RL492 4
RL501–RL502 4
RL511 3
RL521 3
RL651–RL655 3
RL671–RL673 29
RL674–RL675 3
RL681–RL683 3
RL751–RL752 4
RM001–RM007 16
RM010 7
RM011–RM013 1
RM021–RM024 1
RM026–RM030 7
RM036–RM040 2
RM041–RM045 1
RM051–RM053 2
RM071 2
RM081 38
RM082 2
RM083 38
RM084 131
RM091 2
RM096–RM097 1
RM116–RM117 2
RM126–RM129 13
RM130–RM132 114
RM136–RM145 1
RM146–RM147 46
RM156–RM158 2
RM166–RM167 1
RM168–RM177 5
RM191–RM192 47
RM231–RM233 115
RM241–RM246 14
RM261–RM264 1
RM316 13
RM317–RM318 114
RM331–RM333 1
Variable  Group

### Page 42

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BOEING SERVICE BULLETIN 747-28A2280
 
 
RM341 1
RM351–RM355 2
RM366–RM367 2
RM401–RM403 2
RM426 7
RM431 7
RM441–RM443 30
RM445 30
RM801–RM803 20
RM811–RM813 22
RM851–RM855 3
RM856–RM859 31
RM861–RM863 3
RM871–RM880 4
RM881–RM889 11
RM891–RM899 3
RM901–RM906 3
RM911 3
RR701 72
RR721–RR722 48
RR723–RR724 11
RR746–RR748 116
RR851–RR856 3
RR861–RR862 4
RR951 73
RR952 74
RT001–RT005 23
RT006–RT007 49
RT008–RT011 32
RT012–RT014 127
RT021–RT022 39
RT031–RT033 40
RT034–RT035 128
RT041–RT042 50
RT043–RT044 51
RT045–RT047 41
RT061 75
RT071–RT072 52
RT073 21
Variable  Group

### Page 43

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BOEING SERVICE BULLETIN 747-28A2280
 
 
RT074 117
RT075 76
RT101–RT102 53
RT103 77
RT121 129
RT131–RT137 124
RT151–RT152 54
RT161–RT168 124
RT401 55
RT402–RT403 56
RT404–RT405 57
RT406 55
RT407–RT410 33
RT411–RT412 126
RT431–RT432 58
RT433–RT436 34
RT437–RT438 59
RT439–RT447 12
RT451–RT455 17
RT456 78
RT457 79
RT458–RT469 6
RT471–RT485 8
RT486–RT487 60
RT488–RT489 61
RT490–RT499 10
RT501 80
RT502–RT505 35
RT506–RT507 62
RT508 81
RT509 82
RT510 83
RT511–RT512 63
RT513 24
RT514–RT515 123
RT516 24
RT517 123
RT518 24
RT519 123
Variable  Group

### Page 44

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BOEING SERVICE BULLETIN 747-28A2280
 
 
RT520 42
RT521–RT523 123
RT524 42
RT525 123
RT526 24
RT527 123
RT528 24
RT529 123
RT530 42
RT531–RT532 64
RT533 84
RT534–RT535 65
RT551 85
RT552–RT556 25
RT557–RT559 43
RT560 86
RT561 87
RT562–RT568 6
RT571 88
RT572 89
RT573 90
RT574 91
RT575 92
RT576 93
RT577–RT588 123
RT590 123
RT591 94
RT601 95
RT602 96
RT603–RT604 66
RT605–RT608 36
RT609–RT630 123
RT631–RT632 121
RT633–RT634 123
RT636–RT640 123
RT641–RT645 26
RT646–RT650 27
RT651 97
RT652–RT654 130
Variable  Group

### Page 45

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BOEING SERVICE BULLETIN 747-28A2280
 
 
RT655–RT657 44
RT671–RT672 17
RT673 6
RT681–RT682 67
RT691–RT692 68
RT693 98
RT694–RT699 125
RT701 99
RT702 100
RT703 101
RT704 102
RT711 103
RT712 104
RT713–RT716 117
RT717 9
RT741 39
RT742 105
RT743 37
RT744–RT750 18
RT751 106
RT752 107
RT753–RT755 124
RT756–RT757 9
RT776 108
RT777 69
RT781 109
RT782 110
RT783–RT784 70
RT801–RT803 125
RT811–RT814 123
RT831–RT835 123
RT837 123
RT861–RT864 28
RT876 122
RT877–RT880 118
RT931–RT932 124
RT945–RT949 124
RT951–RT955 124
RT966–RT967 130
Variable  Group

### Page 46

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BOEING SERVICE BULLETIN 747-28A2280
 
 2. Spares Affected
None.
B. Concurrent Requirements
The service bulletin(s) listed below must be done before or at the same time as this service bulletin:
RU001–RU006 118
RU016 28
RU017 124
RU031–RU032 124
RU051–RU052 45
RU059 124
RU060 45
RU061–RU062 124
RU081–RU083 37
RU101–RU102 71
RU121 10
RU122 119
RU123 111
RU124–RU125 15
RU126–RU131 113
RU132 112
RU801 120
RU802–RU809 130
RU831–RU841 9
Group  1-131: 
Company Service Bulletin Description Notes
Boeing 747-31-2376, 
Original Issue
Installs new Integrated Display System (IDS) 
software
(a)(c)
Boeing 747-31-2377, 
Original Issue
Installs new Integrated Display System (IDS) 
software
(b)(d)
Boeing 747-31-2378, 
Original Issue
Installs new Integrated Display System (IDS) 
software
(e)
(a) This service bulletin is not a concurrent or prior requirement for airplanes RL429, 
RL430, RL473, RL511, RL521.  These airplanes received the new software in 
production.
(b) This service bulletin is not a concurrent or prior requirement for airplanes RL456, 
RL492, RL502.  These airplanes received the new software in production.
Variable  Group

### Page 47

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BOEING SERVICE BULLETIN 747-28A2280
 
 
C. Reason
Accomplishment of the changes in this service bulletin will help prevent an ignition source in a fuel 
tank as a result of a override/jettison fuel pump that continues to run after it has been commanded 
OFF.  An ignition source in a fuel tank could result in a fire or an explosion.  
A safety assessment conducted by Boeing under Special Federal Aviation Regulation (SFAR) 88, 
"Fuel Tank System Fault Tolerance Evaluation Requirements" indicates that there is a small risk of an 
ignition source in a fuel tank if a override/jettison fuel pump continues to run for an extended time after 
fuel level goes below the pump inlet.  When the Engine Indicating and Alert System (EICAS) status 
message "FUEL TANK/ENGINE" is received (all main tanks are equal), the inboard main override/
jettison pumps are normally commanded off.  When the fuel quantity in the center tank goes below the 
specified weight, the center override/jettison pumps are normally commanded off.  However, if a single 
failure in the pump control circuitry occurs, a pump can continue to run after it is commanded off.  
When a pump runs after the fuel level goes below the pump inlet, there is a small risk that the pump 
can cause an ignition source in the fuel tank from an overheat condition, electrical arcs or frictional 
sparks.   
This service bulletin gives the instructions to install new pump control relays and time delay relays in 
the circuitry for the center fuel tank override/jettison fuel pumps and the main fuel tank override/jettison 
fuel pumps.  The new pump control relays provide a redundant power control if a failure of the existing 
relays occurs.  The new time delay relays do an automatic shutoff of the override/jettison fuel pumps 
in the center tank or the main tank 15 seconds after a low pressure indication. The time delay relays 
provide redundant power control if a failure of a flight deck switch in the on position occurs.  Each set 
of relays have a new EICAS status message to annunciate a fault in a pump control relay.  For the 
center tank, the EICAS status messages are "FUEL CMD CTR L" and "FUEL CMD CTR R".  For the 
main tank, the EICAS status messages are "FUEL CMD OVD 2" and "FUEL CMD OVD 3".   These 
messages are enabled by a fuels pseudo hardware program pin on the Electronic Flight Indication 
System (EFIS)/EICAS Interface Units (EIU).  These changes help make sure that the risk of an ignition 
source in a fuel tank is kept to a minimum.  The changes are identical to the changes to airplanes in 
production.
This change affects Section 9 of the 747-400 Maintenance Planning Data (MPD) document.  New 
Airworthiness Limitations (AWL) "28-AWL-26" will be added to Section 9 of the MPD to include an 
operational test of the uncommanded on system for the override/jettison fuel pumps in the main 2 and 
main 3 fuel tanks.
As a part of a service bulletin validation program, this change was completed on airplane RM084 by 
Service Bulletin 747-28A2280 Original Issue before the release of Revision 1 of this service bulletin.  
The change completed on airplane RM084 by Service Bulletin 747-28A2280 Original Issue is 
equivalent to the release of Revision 1 of this service bulletin.   Airplane RM084 has the configuration 
of a Group 131 airplane.
(c) This service bulletin is applicable for General Electric powered airplanes.
(d) This service bulletin is applicable for Pratt and Whitney powered airplanes.
(e) This service bulletin is applicable for Rolls Royce powered airplanes.
Group  1-131: 
Company Service Bulletin Description Notes

### Page 48

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BOEING SERVICE BULLETIN 747-28A2280
 
 
Revision 1 is sent to update the wire diagrams and wire installation figures, include more information 
on access, and update the material information section because more wiring parts are needed to 
complete the change. Also more figures are needed to show the configuration of the validation 
airplane.
The effectivity group assignment for RM084 was changed from Group 2 to new Group 131 to show 
the correct wiring configuration for this airplane.
The data given in Information Notice 747-28-2280 IN 01 is included in this revision with one exception. 
In Figures 113, 116, 117, 118, 119, 120, 121, the wires W3942-8FE, W3942-8FF, and W3942-8FH 
are specified as size 20 wire but they are size 22 wire. This statement in IN 01 is incorrect and the wire 
size should be size 20.
D. Description
Group  1-2, 5-10, 12-28, 30, 32-47, 49-71, 75-115, 117-120, 123-131: Get access to the main 
equipment center.  Get access to the wire bundles in the ceiling from station 400 to station 970 in the 
forward cargo compartment on the right and left sides.  Get access to the wiring below the floor panels 
from station 900 to station 1200 to the AL1201 and AL1202 disconnect brackets in the passenger 
cabin on the right and left sides.  Install the new P914 panel assembly on the left side of the airplane.  
Install the new P915 panel assembly on the right side of the airplane.  Change the airplane wiring.  Do 
a functional test.  Close access.
Group  121-122: Get access to the main equipment center.  Install the new P914 panel assembly on 
the left side of the airplane.  Install the new P915 panel assembly on the right side of the airplane.  
Change the airplane wiring.  Do a functional test.  Close access.
Group  3-4, 11, 29, 31, 48, 72-74, 116: Get access to the main equipment center.  Get access to the 
wire bundles in the ceiling from station 400 to station 970 in the forward cargo compartment on the 
right and left sides.  Get access to the wiring below the floor panels from station 900 to station 1200 
to the AL1201 and AL1202 disconnect brackets on the main deck on the right and left sides.  Get 
access to the AF0314 disconnect bracket on the right side wall in the cargo compartment on the main 
deck.  Install the new P914 panel assembly on the left side of the airplane.  Install the new P915 panel 
assembly on the right side of the airplane.  Change the airplane wiring.  Do a functional test.  Close 
access.
Boeing Service Bulletin 747-28-2145 and 747-28-2149 have some wiring changes that are related to 
the wiring changes in this service bulletin.
Revision 1 - No more work is necessary on airplanes changed as shown in the original issue of this 
service bulletin.
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.
Boeing recommends that this service bulletin be incorporated within 60 months after the original issue 
date of this service bulletin.

### Page 49

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BOEING SERVICE BULLETIN 747-28A2280
 
 
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 this change for each airplane.  
This estimate is for direct labor only, done by an experienced crew.  Adjust the estimate with operator 
task hour data if necessary.  The estimate does not include lost time.  These are some examples of 
lost time:
— Time to adjust to the workplace
— Time to schedule the work
— Time to inspect the work
— Time to cure the materials
— Time to make the parts
— Time to find the tools.
Group  1-2, 5-10, 12-28, 30, 32-47, 49-71, 75-115, 117-120, 123-131: 
Task
Number of 
Persons Task-Hours Elapsed Hours
Open Access 2 7.50 3.75
Figure 1 1 1.00 1.00
Figure 2 1 1.00 1.00
Figure 3 1 0.75 0.75
Figure 4 1 0.75 0.75
Wiring changes 
(Multiple Figures)
4 385.50 95.25
Test 2 4.00 2.00
Close Access 2 7.50 3.75
TOTAL FOR EACH AIRPLANE 409.50 109.75
Group  3-4, 11, 29, 31, 48, 72-74, 116, 121-122: 
Task
Number of 
Persons Task-Hours Elapsed Hours
Open Access 2 4.50 2.25
Figure 1 1 1.00 1.00
Figure 2 1 1.00 1.00
Figure 3 1 0.75 0.75

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BOEING SERVICE BULLETIN 747-28A2280
 
 
H. Weight and Balance Changes
I. Electrical Load Data
1. Direct Current (DC) Loads
2. Alternating Current (AC) Loads
None
3. Type
Continuous
Figure 4 1 0.75 0.75
Wiring changes 
(Multiple Figures)
4 365.50 90.25
Test 2 4.00 2.00
Close Access 2 4.50 2.25
TOTAL FOR EACH AIRPLANE 383.50 101.75
Group  3-4, 11, 29, 31, 48, 72-74, 116: 
Airplane
Change in Weight 
(Pounds)
Change in Moment 
(Pound-Inches)
Group 3-4, 11, 29, 31, 48, 72-74, 116 +83.6 +37620.0
Group  1-2, 5-10, 12-28, 30, 32-47, 49-71, 75-115, 117-120, 123-131: 
Airplane
Change in Weight 
(Pounds)
Change in Moment 
(Pound-Inches)
Group 1-2, 5-10, 12-28, 30, 32-47, 49-71, 75-115, 117, 123-
130
+84.2 +37890.0
Group  121-122: 
Airplane
Change in Weight 
(Pounds)
Change in Moment 
(Pound-Inches)
Group 121-122 +80.6 +36270.0
Airplanes Amperes Bus
Group 1-131 0.79 D2P180
0.79 D3P180
1.58 D2P180
1.58 D4P180
0.08 DGHBP414A
Group  3-4, 11, 29, 31, 48, 72-74, 116, 121-122: 
Task
Number of 
Persons Task-Hours Elapsed Hours

### Page 51

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BOEING SERVICE BULLETIN 747-28A2280
 
 
Intermittent
J. References
1. Existing Data:
a. PRR 85539-8
b. 747-400 Aircraft Maintenance Manual (AMM)  12-11-00, 20-41-03, 24-22-00, 24-52-01, 
25-25-00, 25-27-00, 25-59-01, 28-26-00, 28-31-00, 31-61-00, 32-09-02, 34-61-02, 
45-10-00, 53-21-02
c. 747-400 Structural Repair Manual (SRM)  50-41-02, 51-40-02, 51-40-06, 51-41-06
d. 747-400 Wiring Diagram Manual (WDM)  28-21-11, 28-31-21, 28-31-22, 28-31-23, 
28-31-24, 28-31-25, 28-31-26, 28-42-11, 28-42-12, 28-42-13, 28-42-14
e. Boeing Drawing 012W6100 
f. Boeing Parts Standards Document D-590
g. Boeing Service Bulletin  747-28-2145, 747-28-2149, 747-31-2376, 747-31-2377, 
747-31-2378
h. Standard Overhaul Practices Manual (SOPM)  20-50-05
i. Standard Wiring Practices Manual (SWPM)  20-10-11, 20-10-12, 20-10-14, 20-10-19, 
20-20-00, 20-20-11, 20-30-11, 20-30-12, 20-60-08, 20-61-11, 20-71-14, 20-72-17, 
20-81-12, 20-81-19, 20-90-11
2. Data supplied with this Service Bulletin:
None.

### Page 52

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BOEING SERVICE BULLETIN 747-28A2280
 
 
3. Installation Drawings Used in the Preparation of this Service Bulletin:
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.
Drawing Number Title
284U0914 P914 PANEL EQUIPMENT ASSEMBLY AND INSTALLATION
284U0915 P915 PANEL EQUIPMENT ASSEMBLY AND INSTALLATION
288U3026 E2-6 RIGHT MAIN EQUIPMENT CENTER
288U4122 WIRE BUNDLE INSTALLATION UPPER DECK SIDEWALL RH, 
STA 243 THRU 403
288U4126 WIRE BUNDLE INSTALLATION MAIN DECK AREA SIDEWALL 
RH, STA 243 THRU 403
288U4127 WIRE BUNDLE INSTALLATION LOWER SIDEWALL LH, STA 
243 THRU 403
288U4128 WIRE BUNDLE INSTALLATION LOWER SIDEWALL RH, STA 
243 THRU 403
288U4129 WIRE BUNDLE INSTALLATION NOSE WHEEL WELL RH AND 
FWD 400 BULKHEAD RH
288U4132 WIRE BUNDLE INSTALLATION BULKHEAD AFT SIDE STA 400
288U4147 WIRE BUNDLE INSTALLATION LOWER SIDEWALL LH, STA 
403 THRU 523
288U4150 WIRE BUNDLE INSTALLATION MAIN DECK FLOOR BEAMS 
RH, STA 403 THRU 523 AND AFT 400 BULKHEAD RH
288U4151 WIRE BUNDLE INSTALLATION MAIN DECK FLOOR BEAMS 
LH, STA 403 THRU 523 AND AFT BULKHEAD LH
288U4156 WIRE BUNDLE INSTALLATION MAIN DECK FLOOR BEAMS, 
STA 403 THRU 523, LBL 50 TO RBL 60
65B07936 BULKHEAD INSTL - STA 400, NOSE WHEEL WELL
828B8000 WIRE BUNDLE INSTAL - 747-400 LARGE CARGO FREIGHTER 
- SHIPS
828B8101 WIRE BUNDLE INSTALLATION - NOSE SECTION 41
828B8104 WIRE BUNDLE INSTALLATION - LOWER LOBE

### Page 53

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BOEING SERVICE BULLETIN 747-28A2280
 
 
K. Publications Affected
L. Interchangeability and Intermixability of Parts
Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.
Publication Chapter-Section
747 Maintenance Manual 28-31
747 Wiring Diagram Manual 28-31, 28-42
747 Fault Reporting Manual EICAS Status Messages
747 Fault Isolation Manual 28-31
747 Illustrated Parts Catalog 28-31
747 System Schematic Manual 28-31, 28-42
747-400 Maintenance Planning Data (MPD) Section 9

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BOEING SERVICE BULLETIN 747-28A2280
 
 
BLANK PAGE

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BOEING SERVICE BULLETIN 747-28A2280
 
 
2. MATERIAL INFORMATION
A. Material - Price and Availability
Boeing can supply the kits shown in Paragraph 2.C., Parts Necessary For Each Airplane as shown 
below.  If there is a limit to the quantity (QTY) of available kits, a supply sequence is given by Spares.  
More kits become available as shown in the Reorder Lead Time (ROLT).  ROLT is calculated from the 
date Boeing gets the purchase order.
Group  2, 21, 24, 28, 42, 52, 63, 69, 71, 83, 92-93, 112-113, 123-125, 127, 129, 131: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-1 Top Kit 08/14/09 19 35 $75,525
Group  3, 29, 31, 72: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-2 Top Kit 08/14/09 9 35 $75,470
Group  6, 10, 61, 70, 79, 87, 110: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-3 Top Kit 08/14/09 4 35 $75,524
Group  8, 17, 43: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-4 Top Kit 08/14/09 2 35 $75,302
Group  4: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-5 Top Kit 08/14/09 2 35 $75,503
Group  27, 36, 68, 75, 90, 106-107: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-6 Top Kit 08/14/09 1 35 $75,007
Group  53, 77, 101-102, 126: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-7 Top Kit 11/05/09 1 35 $75,525

### Page 56

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Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 56 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
Group  11, 48: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-8 Top Kit 11/05/09 1 35 $75,503
Group  18, 37, 105: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-9 Top Kit 08/14/09 1 35 $75,525
Group  26, 66: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-10 Top Kit 08/14/09 1 35 $75,848
Group  12: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-11 Top Kit 08/14/09 1 35 $75,525
Group  32, 49: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-12 Top Kit 08/14/09 1 35 $75,412
Group  23: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-13 Top Kit 08/14/09 1 35 $75,894
Group  35, 62: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-14 Top Kit 08/14/09 1 35 $75,007
Group  25, 85: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-15 Top Kit 08/14/09 1 35 $75,007
Group  33, 99: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-16 Top Kit 08/14/09 1 35 $75,007

### Page 57

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BOEING SERVICE BULLETIN 747-28A2280
 
 
Group  30: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-17 Top Kit 08/14/09 1 35 $75,130
Group  51: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-18 Top Kit 08/14/09 1 35 $75,894
Group  55, 57: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-19 Top Kit 08/14/09 1 35 $75,007
Group  34: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-20 Top Kit 08/14/09 1 35 $75,007
Group  60, 78, 86: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-21 Top Kit 08/14/09 1 35 $75,523
Group  91, 98, 108: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-22 Top Kit 08/14/09 1 35 $75,525
Group  39: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-23 Top Kit 08/14/09 1 35 $75,524
Group  41: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-24 Top Kit 08/14/09 1 35 $75,412
Group  88-89, 94: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-25 Top Kit 08/14/09 1 35 $75,007

### Page 58

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BOEING SERVICE BULLETIN 747-28A2280
 
 
Group  45: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-26 Top Kit 10/06/09 1 35 $75,525
Group  73-74: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-27 Top Kit 08/14/09 1 35 $75,503
Group  54: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-28 Top Kit 08/14/09 1 35 $75,033
Group  56: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-29 Top Kit 08/14/09 1 35 $75,444
Group  58: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-30 Top Kit 08/14/09 1 35 $75,007
Group  59: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-31 Top Kit 08/14/09 1 35 $75,525
Group  81-82: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-32 Top Kit 08/14/09 1 35 $75,524
Group  64: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-33 Top Kit 05/27/08 1 35 $75,894
Group  95-96: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-34 Top Kit 08/14/09 1 35 $75,848

### Page 59

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Revision 1:  November 25, 2009 747-28A2280
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 59 of 1162
BOEING SERVICE BULLETIN 747-28A2280
 
 
Group  67: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-35 Top Kit 08/14/09 1 35 $75,007
Group  80: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-36 Top Kit 08/14/09 1 35 $75,444
Group  100: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-37 Top Kit 08/14/09 1 35 $75,524
Group  109: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-38 Top Kit 08/14/09 1 35 $75,305
Group  9, 15, 44, 76, 97, 104, 114, 117-118, 120, 128, 130: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-39 Top Kit 08/14/09 7 35 $75,525
Group  111, 119: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-40 Top Kit 08/14/09 1 35 $75,524
Group  65: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-41 Top Kit 08/14/09 1 35 $75,412
Group  40: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-42 Top Kit 08/14/09 1 35 $75,848
Group  84: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-43 Top Kit 08/14/09 1 35 $75,894

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BOEING SERVICE BULLETIN 747-28A2280
 
 
The kits are subject to the terms and conditions of the Boeing standard purchase order 
acknowledgment.  After the Unit Price date, new price and ROLT data is applicable.  Prices are in 
United States dollars.  Terms: Net 30 days.
Group  103: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-44 Top Kit 08/14/09 1 35 $75,524
Group  50: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-45 Top Kit 08/14/09 1 35 $75,894
Group  116: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-46 Top Kit 08/14/09 1 35 $75,503
Group  121: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-47 Top Kit 10/29/09 1 35 $75,307
Group  1, 5, 7, 19-20, 38, 46-47, 115: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-48 Top Kit 10/29/09 1 35 $75,589
Group  14: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-49 Top Kit 10/29/09 1 35 $75,589
Group  13, 16, 22: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-50 Top Kit 10/29/09 1 35 $75,589
Group  122: 
Kit Number Name Date QTY
ROLT 
(Weeks)
Unit Price thru
DEC 31/09
015U1807-51 Top Kit (a) - 35 $75,589
(a) Contact Boeing Spares

The text continues at https://openairdocs.org/service-documents/boeing/747-28a2280/file/f8ad0efae5b6.md?from=61

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