# Boeing Alert Service Bulletin 747-28A2281: Revision 1 - Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2009-0454; AD 2010-14-08 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Boeing Alert Service Bulletin 747-28A2281](https://openairdocs.org/service-documents/boeing/747-28a2281.md) - Title as filed: Boeing Service Bulletin - Pages: 182 - PDF: https://openairdocs.org/files/sha256/f8/83/f88302e414dcd1dee140d4a2c740d2fd12bcc52ba78e3240e97b434d2791c0ba - Page: https://openairdocs.org/service-documents/boeing/747-28a2281/file/f88302e414dc ## Text Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 1 of 182 Commercial Airplanes 747 Service Bulletin Number: 747-28A2281 Original Issue: December 13, 2007 Revision 1: November 25, 2009 ATA System: 2817 2831 SUBJECT: FUEL - Fuel Jettison System - Horizontal Stabilizer Tank Override/Jettison Fuel Pumps - Change to Give Redundant Control of the Fuel Pumps BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2007 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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BLANK PAGE Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 2 of 182 BOEING SERVICE BULLETIN 747-28A2281 BLANK PAGE ### Page 3 Table of Contents Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 3 of 182 BOEING SERVICE BULLETIN 747-28A2281 Table of Contents Revision Transmittal Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . 45 3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . 46 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . 47 2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 2. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . 56 3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 4. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . 56 3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 FIGURE 1: INSTALL RELAYS ON E-8 SHELF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2 FIGURE 2: WIRE BUNDLE ROUTING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . 92 FIGURE 3: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . . . 96 FIGURE 4: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . . . 97 FIGURE 5: INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . . . . . . . . . 98 FIGURE 6: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . . . 99 FIGURE 7: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . . . 101 FIGURE 8: INSTALL NEW WIRING (WIRE BUNDLE W4588) . . . . . . . . . . . . . . . . . . . . . 103 FIGURE 9: INSTALL NEW WIRING (WIRE BUNDLE W4588) . . . . . . . . . . . . . . . . . . . . . 104 FIGURE 10: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4588) . . . . . . . . . . . . . . 106 FIGURE 11: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4588) . . . . . . . . . . . . . . 108 ### Page 4 Table of Contents Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 4 of 182 BOEING SERVICE BULLETIN 747-28A2281 FIGURE 12: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4588) . . . . . . . . . . . . . 110 FIGURE 13: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W3845) . . . . . . . . . . . . . 112 FIGURE 14: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4758) . . . . . . . . . . . . . 113 FIGURE 15: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 114 FIGURE 16: INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . . . . . . . . 116 FIGURE 17: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 118 FIGURE 18: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 120 FIGURE 19: INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . . . . . . . . 122 FIGURE 20: INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . . . . . . . . 123 FIGURE 21: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 124 FIGURE 22: INSTALL RELAYS ON E-8 SHELF . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 FIGURE 23: WIRE BUNDLE ROUTING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . 133 FIGURE 24: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . 137 FIGURE 25: INSTALL NEW WIRING (WIRE BUNDLE W4588) . . . . . . . . . . . . . . . . . . . . 138 FIGURE 26: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W3845) . . . . . . . . . . . . . 139 FIGURE 27: INSTALL NEW WIRING (WIRE BUNDLE W4758) . . . . . . . . . . . . . . . . . . . . 140 FIGURE 28: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 141 FIGURE 29: INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . . . . . . . . 143 FIGURE 30: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 144 FIGURE 31: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 146 FIGURE 32: INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . . . . . . . . 148 FIGURE 33: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 149 FIGURE 34: WIRE BUNDLE ROUTING E-8 SHELF . . . . . . . . . . . . . . . . . . . . . . . . . . 151 FIGURE 35: WIRE BUNDLE ROUTING P180 PANEL TO MAWEA CARD FILE . . . . . . . . . . . 154 FIGURE 36: WIRE BUNDLE ROUTING E-8 SHELF . . . . . . . . . . . . . . . . . . . . . . . . . . 162 FIGURE 37: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . 165 FIGURE 38: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . 166 FIGURE 39: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . 167 FIGURE 40: REWORK / INSTALL NEW WIRING (WIRE BUNDLE W4488) . . . . . . . . . . . . . 169 FIGURE 41: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 171 FIGURE 42: REWORK / INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE W3851) . . . . . 173 FIGURE 43: INSTALL NEW WIRING ON E8 SHELF (WIRE BUNDLE 3851) . . . . . . . . . . . . . 175 FIGURE 44: INSTALL NEW WIRING (WIRE BUNDLE W4588) . . . . . . . . . . . . . . . . . . . . 176 FIGURE 45: REWORK/INSTALL NEW WIRING (WIRE BUNDLE W4588) . . . . . . . . . . . . . . 177 FIGURE 46: REWORK/INSTALL NEW WIRING (WIRE BUNDLE W4588) . . . . . . . . . . . . . . 179 FIGURE 47: REWORK/INSTALL NEW WIRING (WIRE BUNDLE W3845) . . . . . . . . . . . . . . 181 ### Page 5 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 5 of 182 Commercial Airplanes 747 Service Bulletin Number: 747-28A2281 Revision Transmittal Sheet Original Issue: December 13, 2007 Revision 1: November 25, 2009 ATA System: 2817 2831 SUBJECT: FUEL - Fuel Jettison System - Horizontal Stabilizer 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 This revision is sent to address the comments received from operators since the original issue of the service bulletin and incorporate differences identified during the validation of the service bulletin. Airplanes RT966-RT967 were deleted from the effectivity. These airplanes are not equipped with horizontal stabilizer fuel tanks. As a part of a service bulletin validation program, this change was completed on Airplane RT409 by original issue of Service Bulletin 747-28A2281 and before the release of Revision 1 of this service bulletin. The change completed on airplane RT409 by Service Bulletin 747-28A2281 is equivalent to Revision 1 of this service bulletin. Airplane RT409 has the configuration of a Group 20 airplane. The following effectivity group assignments were changed to show the correct wiring configuration for the affected airplanes. New airplane Groups 20-37 were added to the service bulletin. The table below shows the new Groups assignments for the effective airplanes: Airplanes Affected Old Airplane Group New Airplane Group RT061, RT407- RT410, RT480- RT487 22 0 RT431-RT435 2 21 RT436 2 22 RT573-RT574, RT576 17 23 RT501, RT506- RT507, RT509 42 4 RT455 2 25 ### Page 6 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 6 of 182 BOEING SERVICE BULLETIN 747-28A2281 The following sections of the service bulletin are changed: — ATA system - added ATA 2817 — Summary Section, Group and Configuration tables in Section 1, added new airplane Groups 20-37 where applicable. — Concurrent Requirements, updated revision level for service bulletin 747-28A2262. — Compliance statements in the Summary and Planning sections were revised with wording "original issue date". — Description Section 1.D added new airplane Group 20-22; Group 23, Configuration 2; Group 24-37. — Manpower tables revised to add new airplane Group 20-22; Group 23, Configuration 2; Group 24-37 and new figures 37-47 to man-hour tables. — Weight and Balance added new airplane Groups 20-37 to the table and new weight and balance information for airplane Groups 16; Group 18; Groups 32-37. — Electrical Load Data added new airplane Groups 20-37 to the applicability. — Material Information Section 2, Added new airplane Group 20-22; Group 23, Configuration 2; Group 24-37 to 015U1808-1 Top Kit. Created new supplemental kit 015U1808-3 with new connector for Group 16; Group 18, Configuration 2; Groups 32-37 airplanes. Figure kits were updated with new applicability and new airplane Group 20-22; Group 23, Configuration 2; Group 24-37. — Parts and Materials, Supplied by the operator, added washer and nut for alternate tray configuration. — Accomplishment Instructions Section 3, General Information, added Note 7 to clarify wire clamp size selection. RT503, RT505 2 26 RT451-RT454 2 27 RT021-RT022 2 28 RT001-RT005, RT401-RT406, RT471-RT479, RT571 22 9 RT502, RT504 2 30 RT551-RT556, RT591, RT641, RT643-RT645, RT671, RT691- RT692 23 1 RM081, RM083, RT411-RT412, RT609-RT630, RT753-RT755, RT945-RT949 13 2 RT605-RT608, RT752 23 3 RM146, RT783- RT784 83 4 RT777 11 35 RT751 2 36 RT601-RT604 2 37 Airplanes Affected Old Airp lane Group New Airplane Group ### Page 7 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 182 BOEING SERVICE BULLETIN 747-28A2281 — Accomplishment Instructions Section 3. revised figure reference, airplane applicability and added new airplane Group 20-22; Group 23, Configuration 2; Group 24-37 where applicable. — Figure 1 changes: — Added new airplane Group 20-22; Group 23, Configuration 2; Group 24-37. — Revised sheet 1 and 2, added sheets 5, 6 and 7 to show alternate tray configuration. — Revised Circle Note 2, More Data, added additional wording, If Static Inverter is installed. — Revised Circle Note 3, More Data, added information for bolt installation if equipment tray has stiffening joggle. — Revised Circle Note 6, More Data, added hole diameter to drilling procedure. — Revised Circle Note 18, More Data, added additional wording, If Static Inverter was removed. — Added Note (e), gives information for bracket and bolt installation if equipment tray has stiffening joggle. — Figure 2 added new airplane Group 20-22; Group 23, Configuration 2; Group 24-37. — Figure 3 Flag Note 2, corrected SWPM call out. Changed SWPM 20-10-11 to SWPM 20-61-11 and added new airplane Group 32, 34-35. — Figures 4 revised illustration to show wire W4488-071-22 as a cap and stowed wire. — Figures 5 revised airplane applicability. — Figures 6 revised airplane applicability and added new airplane Group 30-31, 33, 37. — Figures 8 revised airplane applicability and added new airplane Group 20-22; Group 23, Configuration 2; Group 24-31. — Figures 10 revised airplane applicability. — Figure 13 revised Flag Note 2 socket P/N to BACC47CP1S for connector D41807J. Revised airplane applicability and added new airplane Group 20-22; Group 23, Configuration 2; Group 24-31. — Figure 14 revised to show wire W4758-633-24 connected to pin C9 on connector DW3417C and wire W4758-634-24 connected to pin C8 on connector DW3417C. The nomenclature shown inside M7952 is also revised to show "FUEL CMD STAB R" for pin C9 and "FUEL CMD STAB L" for pin C8. Added new airplane Group 20-22; Group 23, Configuration 2, Group 24-37. — Figure 15 added new airplane Group 20, 22; Group 23, Configuration 2; Group 24-25, 28, 32-36. — Figure 16 and 17 added new airplane Group 20-22; Group 23, Configuration 2; Group 24-37. — Figure 18 revised Flag Note 2 socket P/N to BACC47CP3T for connector D40106J and added new airplane Group 20, 22; Group 23, Configuration 2; Group 24-25, 28, 32-36. — Figure 19 revised airplane applicability and added new airplane Group 20-22, 29. — Figure 20 revised airplane applicability and added new airplane Group 30-35, 37. — Figure 21 added new airplane Group 20-22; Group 23, Configuration 2; Group 24-37. — Figure 26 revised Flag Note 2 socket P/N to BACC47CP1S for connector D41807J. — Figure 27 revised to show wire W4758-633-24 connected to pin C9 on connector DW3417C and wire W4758-634-24 connected to pin C8 on connector DW3417C. The nomenclature shown inside M7952 is also revised to show "FUEL CMD STAB R" for pin C9 and "FUEL CMD STAB L" for pin C8. — Figure 31 revised Flag Note 2 socket P/N to BACC47CP3T for connector D40106J. — Figure 36 added new airplane Group 20-22; Group 23, Configuration 2; Group 24-37. — New Figure 37 added to use pin 30 on connector D40103P for Group 20, 29 airplanes. — New Figure 38 added to use pin 36 on connector D40103P for Group 6, Configuration 2; Group 23, Configuration 2; Group 24 airplanes. — New Figure 39 added to use pin 30 on connector D40103P for Group 3, Configuration 1; Group 21-22 airplanes. — New Figure 40 added to use pin 36 on connector D40103P for Group 5, Configuration 2, Group 13, 25-28, 36 airplanes. — New Figure 41 added to show wire W3851-320-12B deleted from pin B2 and wire W3851-321-12Y deleted from pin C2 on relay R7401 for Group 19, Configuration 1; Group 21, 26-27, 29-31, 37 airplanes. — New Figure 42 added to show wire W3851-323-12B deleted from pin B2 and wire W3851-324-12Y deleted from pin C2 on relay R7402 for Group 21, 26-27, 29-31, 37 airplanes. — New Figure 43 added to use pin 36 on connector D40103J for Group 5, Configuration 2; Group 6, Configuration 2; Group 13; Group 23, Configuration 2; Group 24-28, 36 airplanes. ### Page 8 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 8 of 182 BOEING SERVICE BULLETIN 747-28A2281 — New Figure 44 added to install new connector D41785P for Group 18, Configuration 2; Group 32-33, 36- 37 airplanes. — New Figure 45 added to install new connector D41785P for Group 16, 35 airplanes. — New Figure 46 added to install new connector D41785P for Group 34 airplanes. — New Figure 47 added to install new connector D41785J for Group 16; Group 18, Configuration 2; Group 32-37 airplanes. The data given in Information Notice 747-28A2281 IN 01, IN 02 and IN 03 is included in this revision. 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: December 13, 2007 Revision 1: November 25, 2009 ### Page 9 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 182 Commercial Airplanes 747 Service Bulletin Number: 747-28A2281 Summary Original Issue: December 13, 2007 Revision 1: November 25, 2009 ATA System: 2817 2831 SUBJECT: FUEL - Fuel Jettison System - Horizontal Stabilizer 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 horizontal stabilizer 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 indicates that there is a small risk of an ignition source in a fuel tank if a horizontal stabilizer override/jettison fuel pump continues to run for an extended time after fuel level goes below the pump inlet. Normally the pump is commanded off when a low fuel pressure is indicated. 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 relays and wiring in the circuitry for the horizontal stabilizer override/jettison fuel pumps. The new relays and wiring for the horizontal stabilizer override/jettison fuel pumps remove power from these pumps when the pumps continue to run after the pumps have been commanded off. Each set of relays have a new Engine Indication and Crew Alerting System (EICAS) status message to annunciate a fault in a pump control relay. For the horizontal stabilizer tank, the EICAS status messages are FUEL CMD STAB L and Fuel CMD STAB R. 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 service bulletin is the result of the safety assessments conducted by Boeing under Special Federal Aviation Regulation (SFAR) 88, "Fuel Tank System Fault Tolerance Evaluation Requirements". ACTION Group 1-8, 10-15, 17, 19-31: Get access to E8 shelf and install new relays. Rework/install new wiring on E8 shelf. Get access and rework/install new airplane wiring from E8 shelf to disconnect AC1401 and rework/install new airplane wiring from disconnect AC1401 to P180 panel. Rework/install new wiring on P180 panel. Rework wiring from P180 panel to Modularized Avionics and Warning Electronics Assembly (MAWEA) Card File (P54). Do a functional test. Close access. ### Page 10 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 10 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 9: Get access to E8 shelf and install new relays. Rework/install new wiring on E8 shelf. Get access and rework/install new airplane wiring from E8 shelf to disconnect AC1401 and install new airplane wiring from disconnect AC1401 to P180 panel. Rework/install new wiring on P180 panel. Install new wiring from P180 panel to MAWEA Card File (P54). Do a functional test. Close access. Group 16, 18, 32-37: Get access to E8 shelf and install new relays. Rework/install new wiring on E8 shelf. Get access and rework/install new airplane wiring from E8 shelf to disconnect AC1401 and rework/install new airplane wiring from disconnect AC1401 to P180 panel and add new connector to P180 panel. Rework/install new wiring on P180 panel. Rework wiring from P180 panel to MAWEA Card File (P54). Do a functional test. Close access. Boeing Service Bulletin 747-28A2280 is related to this service bulletin and has some common access procedures. EFFECTIVITY 747-400 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 5 years after the original issue of this service bulletin. INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the configuration changes given in this service bulletin. MANPOWER MATERIAL INFORMATION Boeing Supplied Kits/Parts. Refer to Paragraph 2.A., Material - Price and Availability. Airplanes Total Task Hours Elapsed Hours Groups 1, 7, 18, 19, 32 101.20 52.30 Groups 2, 3, 5, 10, 12, 14, 20-22, 25- 31, 33, 36-37 101.30 52.35 Groups 4, 6, 15, 17, 23-24 101.10 52.25 Group 8, 11, 34-35 101.40 52.40 Group 9 107.40 55.30 Group 13, 16 101.50 52.45 ### Page 11 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 11 of 182 BOEING SERVICE BULLETIN 747-28A2281 STA 1580 STA 2200 2100 STA STA 1980 AC1401 ADD/REWORK 2 WIRES FROM E-8 SHELF TO P180 PANEL (W4588) ADD/REWORK 2 WIRES FROM E-8 SHELF TO P180 PANEL (W4488) INSTALL 2 NEW RELAYS ON E-8 SHELF. REWORK WIRING ON E-8 SHELF. REVISE WIRING ON P180 PANEL AND MAWEA CARD FILE P54. 1325681 ### Page 12 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 12 of 182 BOEING SERVICE BULLETIN 747-28A2281 BLANK PAGE ### Page 13 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 13 of 182 Commercial Airplanes 747 Service Bulletin Number: 747-28A2281 Original Issue: December 13, 2007 Revision 1: November 25, 2009 ATA System: 2817 2831 SUBJECT: FUEL - Fuel Jettison System - Horizontal Stabilizer Tank Override/Jettison Fuel Pumps - Change to Give Redundant Control of the Fuel Pumps 1. PLANNING INFORMATION A. Effectivity 1. Airplanes Refer to Service Bulletin Index Document D6-30300 Part 3 for Airplane Variable Number, Line Number, and Serial Number data. 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 horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and Modularized Avionics and Warning Electronics Assembly (MAWEA) card file, Top KIt 015U1808-1 kit for parts. 2 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top kit 015U1808-1 kit for parts. 3 - 747-400 airplanes with horizontal stabilizer tank affected by service bulletin 747-28-2197 or 747- 28-2183. 1 747-400 airplanes with horizontal stabilizer tank changed by service bulletin 747-28-2197 or 747-28-2183. 2 747-400 airplanes with horizontal stabilizer tank not changed by service bulletin 747-28-2197 or 747-28-2183. ### Page 14 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 14 of 182 BOEING SERVICE BULLETIN 747-28A2281 4 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 5 - 747-400 airplanes with horizontal stabilizer tank affected by service bulletin 747-28-2265. 1 747-400 airplanes with horizontal stabilizer tank changed by service bulletin 747-28-2265. 2 747-400 airplanes with horizontal stabilizer tank not changed by service bulletin 747-28-2265. 6 - 747-400 airplanes with horizontal stabilizer tank affected by service bulletin 747-28-2272. 1 747-400 airplanes with horizontal stabilizer tank changed by service bulletin 747-28-2272. 2 747-400 airplanes with horizontal stabilizer tank not changed by service bulletin 747-28-2272. 7 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top kit 015U1808-1 kit for parts. 8 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top kit 015U1808-1 kit for parts. 9 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top kit 015U1808-2 kit for parts. 10 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top kit 015U1808-1 kit for parts. 11 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file. Top Kit 015U1808-1 kit of parts. 12 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 13 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. GROUP CONFIGURATION DESCRIPTION ### Page 15 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 15 of 182 BOEING SERVICE BULLETIN 747-28A2281 14 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 15 - 747-400 airplanes with horizontal stabilizer tank affected by service bulletin 747-28-2275. 1 747-400 airplanes with horizontal stabilizer tank changed by service bulletin 747-28-2275. 2 747-400 airplanes with horizontal stabilizer tank not changed by service bulletin 747-28-2275, 16 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 17 - 747-400 airplanes with horizontal stabilizer tank affected by service bulletin 747-28-2274. 1 747-400 airplanes with horizontal stabilizer tank changed by service bulletin 747-28-2274. 2 747-400 airplanes with horizontal stabilizer tank not changed by service bulletin 747-28-2274. 18 - 747-400 airplanes with horizontal stabilizer tank affected by service bulletin 747-28-2247. 1 747-400 airplanes with horizontal stabilizer tank changed by service bulletin 747-28-2247. 2 747-400 airplanes with horizontal stabilizer tank not changed by service bulletin 747-28-2247. 19 - 747-400 airplanes with horizontal stabilizer tank affected by service bulletin 747-28-2197 or 747- 28-2183. 1 747-400 airplanes with horizontal stabilizer tank changed by service bulletin 747-28-2197 or 747-28-2183. 2 747-400 airplanes with horizontal stabilizer tank not changed by service bulletin 747-28-2197 or 747-28-2183. 20 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 21 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. GROUP CONFIGURATION DESCRIPTION ### Page 16 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 16 of 182 BOEING SERVICE BULLETIN 747-28A2281 22 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 23 - 747-400 airplanes with horizontal stabilizer tank affected by service bulletin 747-28-2274 1 747-400 airplanes with horizontal stabilizer tank changed by service bulletin 747-28-2274. 2 747-400 airplanes with horizontal stabilizer tank not changed by service bulletin 747-28-2274. 24 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 25 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 26 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 27 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 28 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 29 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 30 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 31 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 32 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. GROUP CONFIGURATION DESCRIPTION ### Page 17 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 17 of 182 BOEING SERVICE BULLETIN 747-28A2281 Airplane models: 747-400 IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER AEROLINEAS ARGENTINAS (ARG) 11 RT704 13 RT701–RT702 AIR ATLANTA ICELANDIC (AID) 1 RT515 36 RT751 AIR CARGO GERMANY (CGU) 1 RT633 AIR CHINA (BEJ) 1R M 3 4 1 AIR CHINA CARGO (CGC) 10 RT101 RT103 AIR FRANCE (AFA) 1 RM401–RM403 RT071–RT073 RT121 31 RT591 33 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 34 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 35 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 36 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. 37 - 747-400 airplanes with horizontal stabilizer tank which require wiring changes to the E8 shelf, P180 panel and MAWEA card file, Top Kit 015U1808-1 kit for parts. GROUP CONFIGURATION DESCRIPTION ### Page 18 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 18 of 182 BOEING SERVICE BULLETIN 747-28A2281 AIR NEW ZEALAND (ANZ) 1 RM082 RT673 11 RT703 12 RM191–RM192 19 RT932 2 RT672 31 RT671 AIR PACIFIC (APC) 30 RT502 RT504 AIR PULLMANTUR (PUL) 1 RT523 RT525 RT749 ALL NIPPON AIRWAYS (ANA) 16 RT776 32 RT753–RT755 35 RT777 ASIANA AIRLINES (AAR) 1 RM071 RT131–RT136 RU032 ATLAS AIR (TLS) 33 RT752 AVION AIRCRAFT TRADING H.F. (VNG) 1 RT634 18 RT756 BAHRAIN ROYAL FLIGHT (BHR) 7R M 4 2 6 BRITISH AIRWAYS (BAB) 1 RM096–RM097 RM136–RM145 RM261–RM264 RT488–RT499 RU121 RU126–RU132 20 RT480–RT487 29 RT471–RT479 CATHAY PACIFIC AIRWAYS (CAT) 1 RT457–RT469 RT511–RT512 RT514 RT517 RT522 RT529 RT837 14 RT781–RT782 25 RT455 27 RT451–RT454 4 RT518 RT528 5 RT456 6 RT508 CHINA AIRLINES (CHI) 1 RM021–RM024 RT636–RT640 9 RM441–RM443 RM445 ### Page 19 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 19 of 182 BOEING SERVICE BULLETIN 747-28A2281 CORSAIR (COR) 32 RT613–RT614 RT616 RT618–RT619 RT621 DRAGONAIR (DRG) 1 RT519 15 RT510 RT513 4 RT516 RT524 DUBAI AIR WING (DAW) 1 RM167–RM168 10 RT102 EL AL ISRAEL AIRLINES (ELA) 1 RM091 RT527 RU081–RU083 EVA AIR (EVA) 1 RM116–RM117 RT162–RT163 RT165–RT168 RT951–RT955 EVERGREEN INTERNATIONAL A/L (EVR) 1 RT743 EXPORT RESTRICTED AIRPLANES (YWV) 32 RT620 33 RT606 37 RT602 GARUDA INDONESIA (GIA) 1 RU061–RU062 19 RT931 GECAS (GEF) 32 RT412 RT615 RT622 GREAT WALL AIRLINES (GWL) 1 RT520 HIS MAJESTY THE SULTAN'S FLIGHT (BWN) 1 RT440 JAL INTERNATIONAL (JAL) 1 RT861–RT864 2 RT642 RT646–RT650 31 RT641 RT643–RT645 KALITTA AIR (KAC) 28 RT021–RT022 KLM - ROYAL DUTCH AIRLINES (KLM) 1 RM801–RM803 RT006–RT014 29 RT001–RT005 ### Page 20 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 20 of 182 BOEING SERVICE BULLETIN 747-28A2281 KOREAN AIR (KAL) 1 RM011–RM013 RT577–RT588 RT590 RT811–RT814 17 RT572 RT575 20 RT061 23 RT573–RT574 RT576 29 RT571 KUWAIT AIRWAYS (KUW) 1 RT151 LION AIR (MLI) 26 RT503 RT505 LUFTHANSA GERMAN AIRLINES (DLH) 1 RT045–RT047 RT437–RT439 RT441–RT447 21 RT431–RT435 22 RT436 3 RT043–RT044 MALAYSIA AIRLINES (MAS) 1 RM036–RM040 RM366–RM367 RT744 RT746 RT748 RT750 RU016–RU017 MARTINAIR HOLLAND (MTH) 24 RT501 RT506–RT507 RT509 NORTHWEST AIRLINES (NWA) 1 RM241–RM246 20 RT407–RT410 29 RT401–RT406 OMAN ROYAL FLIGHT (RFO) 7R M 0 1 0 PHILIPPINE AIRLINES (PAL) 1 RT152 RU051–RU052 RU059–RU060 PRESIDENTIAL FLIGHT (ABD) 1 RM084 RT137 QANTAS (QAN) 1 RF001–RF006 RM331–RM333 RT561–RT568 RT742 RU031 2 RT557–RT560 RT741 31 RT551–RT556 SAUDI ARABIAN AIRLINES (SVA) 1 RU101–RU102 7 RM156–RM157 SAUDI ROYAL FLIGHT (SRF) 7R M 1 5 8 ### Page 21 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 21 of 182 BOEING SERVICE BULLETIN 747-28A2281 SINGAPORE AIRLINES (SIA) 1 RM041–RM045 RT521 RT831–RT835 4 RT526 RT530 SONAIR (SON) 1 RM231–RM233 SOUTH AFRICAN AIRWAYS (SAA) 32 RM081 RM083 8R M 1 4 7 THAI AIRWAYS INTERNATIONAL (TII) 1 RM026–RM030 RM431 RT694–RT699 RT801–RT803 2 RT693 31 RT691–RT692 TRANSAERO AIRLINES (TRX) 34 RM146 RT783–RT784 UNITED AIR LINES (UAL) 1 RM166 RM169–RM177 32 RT411 RT609–RT612 RT617 RT623–RT630 33 RT605 RT607–RT608 37 RT601 RT603–RT604 UPS (UPS) 1 RT161 RT164 VIRGIN ATLANTIC AIRWAYS (VAA) 1 RM051–RM053 RM351–RM355 32 RT945–RT949 WORLD AIRWAYS, INC. (WLD) 1 RT745 RT747 YANGTZE RIVER EXPRESS (YTH) 18 RT757 IDENTIFICATION BY VARIABLE NUMBER Variable Group RF001–RF006 1 RM010 7 RM011–RM013 1 RM021–RM024 1 RM026–RM030 1 RM036–RM045 1 RM051–RM053 1 RM071 1 RM081 32 ### Page 22 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 22 of 182 BOEING SERVICE BULLETIN 747-28A2281 RM082 1 RM083 32 RM084 1 RM091 1 RM096–RM097 1 RM116–RM117 1 RM136–RM145 1 RM146 34 RM147 8 RM156–RM158 7 RM166–RM177 1 RM191–RM192 12 RM231–RM233 1 RM241–RM246 1 RM261–RM264 1 RM331–RM333 1 RM341 1 RM351–RM355 1 RM366–RM367 1 RM401–RM403 1 RM426 7 RM431 1 RM441–RM443 9 RM445 9 RM801–RM803 1 RT001–RT005 29 RT006–RT014 1 RT021–RT022 28 RT043–RT044 3 RT045–RT047 1 RT061 20 RT071–RT073 1 RT101–RT103 10 RT121 1 RT131–RT137 1 RT151–RT152 1 RT161–RT168 1 RT401–RT406 29 RT407–RT410 20 Variable Group ### Page 23 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 23 of 182 BOEING SERVICE BULLETIN 747-28A2281 RT411–RT412 32 RT431–RT435 21 RT436 22 RT437–RT447 1 RT451–RT454 27 RT455 25 RT456 5 RT457–RT469 1 RT471–RT479 29 RT480–RT487 20 RT488–RT499 1 RT501 24 RT502 30 RT503 26 RT504 30 RT505 26 RT506–RT507 24 RT508 6 RT509 24 RT510 15 RT511–RT512 1 RT513 15 RT514–RT515 1 RT516 4 RT517 1 RT518 4 RT519–RT523 1 RT524 4 RT525 1 RT526 4 RT527 1 RT528 4 RT529 1 RT530 4 RT551–RT556 31 RT557–RT560 2 RT561–RT568 1 RT571 29 RT572 17 Variable Group ### Page 24 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 24 of 182 BOEING SERVICE BULLETIN 747-28A2281 RT573–RT574 23 RT575 17 RT576 23 RT577–RT588 1 RT590 1 RT591 31 RT601–RT604 37 RT605–RT608 33 RT609–RT630 32 RT633–RT634 1 RT636–RT640 1 RT641 31 RT642 2 RT643–RT645 31 RT646–RT650 2 RT671 31 RT672 2 RT673 1 RT691–RT692 31 RT693 2 RT694–RT699 1 RT701–RT702 13 RT703–RT704 11 RT741 2 RT742–RT750 1 RT751 36 RT752 33 RT753–RT755 32 RT756–RT757 18 RT776 16 RT777 35 RT781–RT782 14 RT783–RT784 34 RT801–RT803 1 RT811–RT814 1 RT831–RT835 1 RT837 1 RT861–RT864 1 RT931–RT932 19 Variable Group ### Page 25 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 25 of 182 BOEING SERVICE BULLETIN 747-28A2281 2. Spares Affected None. B. Concurrent Requirements Changes given in this service bulletin can not be made unless the changes given in these service bulletins are made. 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 horizontal stabilizer 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 indicates that there is a small risk of an ignition source in a fuel tank if a horizontal stabilizer override/jettison fuel pump continues to run for an extended time after fuel level goes below the pump inlet. Normally the pump is commanded off when a low fuel pressure is indicated. 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. RT945–RT949 32 RT951–RT955 1 RU016–RU017 1 RU031–RU032 1 RU051–RU052 1 RU059–RU062 1 RU081–RU083 1 RU101–RU102 1 RU121 1 RU126–RU132 1 Company Service Bulletin Revision Level Description Notes Boeing 747-28A2262 Original Issue, Revision 1, Revision 2. Install automatic shutoff system for the Horizontal Stabilizer Tank (HST) fuel pumps. (a) (a) This service bulletin is not a concurrent or prior requirement for airplanes RM403, RM441-RM443, RM445. Variable Group ### Page 26 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 26 of 182 BOEING SERVICE BULLETIN 747-28A2281 This service bulletin gives the instructions to install new relays and wiring in the circuitry for the horizontal stabilizer override/jettison fuel pumps. The new relays and wiring for the horizontal stabilizer override/jettison fuel pumps remove power from these pumps when the pumps continue to run after the pumps have been commanded off. Each set of relays have a new Engine Indication and Crew Alerting System (EICAS) status message to annunciate a fault in a pump control relay. For the horizontal stabilizer tank, the EICAS status messages are FUEL CMD STAB L and Fuel CMD STAB R. 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 service bulletin is the result of the safety assessments conducted by Boeing under Special Federal Aviation Regulation (SFAR) 88, "Fuel Tank System Fault Tolerance Evaluation Requirements". Revision 1 is sent to address the comments received from operators since the original issue of the service bulletin and incorporate differences identified during the validation of the service bulletin. Airplanes RT966-RT967 were deleted from the effectivity. These airplanes are not equipped with stabilizer tanks. As a part of a service bulletin validation program, this change was completed on Airplane RT409 by original issue of Service Bulletin 747-28A2281 and before the release of Revision 1 of this service bulletin. The change completed on airplane RT409 by Service Bulletin 747-28A2281 is equivalent to Revision 1 of this service bulletin. Airplane RT409 has the configuration of a Group 20 airplane. The data given in Information Notice 747-28A2281 IN 01, IN 02 and IN 03 is included in this revision. D. Description Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 17, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-31: Get access to E8 shelf and install new relays. Rework/install new wiring on E8 shelf. Get access and rework/install new airplane wiring from E8 shelf to disconnect AC1401 and rework/install new airplane wiring from disconnect AC1401 to P180 panel. Rework/install new wiring on P180 panel. Rework wiring from P180 panel to Modularized Avionics and Warning Electronics Assembly (MAWEA). Do a functional test. Close access. Group 9: Get access to E8 shelf and install new relays. Rework/install new wiring on E8 shelf. Get access and rework/install new airplane wiring from E8 shelf to disconnect AC1401 and install new airplane wiring from disconnect AC1401 to P180 panel. Rework/install new wiring on P180 panel. Install new wiring from P180 panel to MAWEA. Do a functional test. Close access. Group 16; Group 18, Configuration 2; Group 32-37: Get access to E8 shelf and install new relays. Rework/install new wiring on E8 shelf. Get access and rework/install new airplane wiring from E8 shelf to disconnect AC1401 and rework/install new airplane wiring from disconnect AC1401 to P180 panel and add new connector to P180 panel. Rework/install new wiring on P180 panel. Rework wiring from P180 panel to MAWEA Card File (P54). Do a functional test. Close access. Revision 1 - No more work is necessary on airplanes changed as shown in the original issue of this service bulletin. Boeing Service Bulletin 747-28A2280 is related to this service bulletin and has some common access procedures. ### Page 27 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 27 of 182 BOEING SERVICE BULLETIN 747-28A2281 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 5 years after the original issue date of this service bulletin. F. Approval This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/ JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other approved Boeing changes. If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin. G. Manpower The table below shows an estimate of the task-hours necessary to do this service bulletin for each airplane. This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator task-hour data if necessary. The estimate does not include lost time. These are some examples of lost time: — Time to adjust to the workplace — Time to schedule the work — Time to examine the work — Time to cure the materials — Time to make the parts — Time to find the tools. Group 3, Configuration 2; Group 5, Configuration 1; Group 6, Configuration 1; Group 15, Configuration 1; Group 17, Configuration 1; Group 18, Configuration 1; Group 19, Configuration 2; Group 23, Configuration 1: Airplanes, No work is necessary for airplanes in this configuration and no Task-Hours are required. Group 1: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 3 2 19.90 9.95 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 ### Page 28 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 28 of 182 BOEING SERVICE BULLETIN 747-28A2281 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.20 52.30 Group 18, Configuration 2; Group 32: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 3 2 19.90 9.95 Figure 44 2 23.20 11.60 Figure 47 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.20 52.30 Group 2: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Group 1: Task Number of Persons Task-Hours Elapsed Hours ### Page 29 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 29 of 182 BOEING SERVICE BULLETIN 747-28A2281 Figure 6 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 33: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 6 2 20.00 10.00 Figure 44 2 23.20 11.60 Figure 47 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 2: Task Number of Persons Task-Hours Elapsed Hours ### Page 30 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 30 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 3, Configuration 1: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 39 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 19 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 4; Group 15, Configuration 2; Group 17, Configuration 2: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 5 2 19.80 9.90 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.10 52.25 ### Page 31 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 31 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 5, Configuration 2; Group 25: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 40 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 43 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 6, Configuration 2; Group 24: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 38 2 19.80 9.90 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 43 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.10 52.25 ### Page 32 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 32 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 7: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 4 2 19.90 9.95 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 19 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.20 52.30 Group 8: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 3 2 19.90 9.95 Figure 11 2 23.40 11.70 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.40 52.40 ### Page 33 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 33 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 34: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 3 2 19.90 9.95 Figure 46 2 23.40 11.70 Figure 47 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.40 52.40 Group 9: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 22 1 2.75 2.75 Figure 23 n/a n/a n/a Figure 24 2 19.90 9.95 Figure 25 2 23.20 11.60 Figure 26 1 1.85 1.85 Figure 27 2 6.40 3.20 Figure 28 2 6.60 3.30 Figure 29 1 2.75 2.75 Figure 30 1 2.85 2.85 Figure 31 2 6.60 3.30 Figure 32 1 2.75 2.75 Figure 33 1 2.85 2.85 Figure 34 1 0.40 0.40 Figure 35 n/a n/a n/a ### Page 34 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 34 of 182 BOEING SERVICE BULLETIN 747-28A2281 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 107.40 55.30 Group 10: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 3 2 19.90 9.95 Figure 12 2 23.30 11.65 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 11: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 3 2 19.90 9.95 Figure 10 2 23.40 11.70 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Group 9: Task Number of Persons Task-Hours Elapsed Hours ### Page 35 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 35 of 182 BOEING SERVICE BULLETIN 747-28A2281 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.40 52.40 Group 35: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 3 2 19.90 9.95 Figure 45 2 23.40 11.70 Figure 47 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.40 52.40 Group 12: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 3 2 19.90 9.95 Figure 9 2 23.30 11.65 Figure 13 1 1.85 1.85 Group 11: Task Number of Persons Task-Hours Elapsed Hours ### Page 36 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 36 of 182 BOEING SERVICE BULLETIN 747-28A2281 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 13: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 40 2 20.00 10.00 Figure 10 2 23.40 11.70 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 43 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.50 52.45 Group 12: Task Number of Persons Task-Hours Elapsed Hours ### Page 37 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 37 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 14: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/ n/a Figure 5 2 19.80 9.90 Figure 11 2 23.40 11.70 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 16: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 7 2 20.00 10.00 Figure 45 2 23.40 11.70 Figure 47 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.50 52.45 ### Page 38 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 38 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 19, Configuration 1: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 3 2 19.90 9.95 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 41 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.20 52.30 Group 20: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 37 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 19 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 ### Page 39 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 39 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 21: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 39 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 41 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 42 2 6.60 3.30 Figure 19 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 22: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 39 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 19 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 ### Page 40 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 40 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 23, Configuration 2: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 38 2 19.80 9.90 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 43 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.10 52.25 Group 26: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 40 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 41 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 42 2 6.60 3.30 Figure 43 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 ### Page 41 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 41 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 27: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 40 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 41 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 42 2 6.60 3.30 Figure 43 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 28: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 40 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 43 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 ### Page 42 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 42 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 36: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 40 2 20.00 10.00 Figure 44 2 23.20 11.60 Figure 47 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 15 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 18 2 6.60 3.30 Figure 43 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 29: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 37 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 41 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 42 2 6.60 3.30 Figure 19 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 ### Page 43 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 43 of 182 BOEING SERVICE BULLETIN 747-28A2281 Group 30: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 6 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 41 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 42 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Group 31: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 6 2 20.00 10.00 Figure 8 2 23.20 11.60 Figure 13 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 41 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 42 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 ### Page 44 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 44 of 182 BOEING SERVICE BULLETIN 747-28A2281 H. Weight and Balance Changes I. Electrical Load Data 1. Direct Current (DC) Loads 2. Alternating Current (AC) Loads None 3. Type Group 37: Task Number of Persons Task-Hours Elapsed Hours Open Access 4 13.00 3.25 Figure 1 1 2.75 2.75 Figure 2 n/a n/a n/a Figure 6 2 20.00 10.00 Figure 44 2 23.20 11.60 Figure 47 1 1.85 1.85 Figure 14 1 0.20 0.20 Figure 41 2 6.60 3.30 Figure 16 1 2.75 2.75 Figure 17 1 2.85 2.85 Figure 42 2 6.60 3.30 Figure 20 1 2.75 2.75 Figure 21 1 2.85 2.85 Figure 36 1 0.40 0.40 Close Access 4 13.00 3.25 Test 2 2.50 1.25 TOTAL FOR EACH AIRPLANE 101.30 52.35 Airplane Change in Weight (Pounds) Change in Moment (Pound-Inches) Groups 1-8 and Groups 10-15, 17, 19-31 +4.8 lbs +7516.8 lb-in Group 9 +4.9 lbs +7673.4 lb-in Groups 16, 18, 32- 37 +4.9 lbs +7673.4 lb-in Airplanes Amperes Bus Groups 1-37 0.60 D1P7 0.60 D2P7 ### Page 45 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 45 of 182 BOEING SERVICE BULLETIN 747-28A2281 Continuous Intermittent J. References 1. Existing Data: a. Engineering Change Memo PRR 85539-8 b. 747-400 Aircraft Maintenance Manual (AMM) 12-11-01, 20-11-16, 24-22-00, 24-29-04; 25-21-01, 25-22-01, 25-52-01, 25-76-02, 31-61-00, 32-09-02, 34-61-02, 45-10-00, 53-21-02 c. 747 Wiring Diagram 28-21-28, 28-21-31, 28-42-15, 30-41-31 d. Boeing Drawing 012W6100 e. 747 Structural Repair Manual (SRM) Subject 51-40-05 f. Boeing Parts Standards Document D-590 g. Boeing Service Bulletin 747-28-2183 h. Boeing Service Bulletin 747-28-2197 i. Boeing Service Bulletin 747-28-2247 j. Boeing Service Bulletin 747-28-2265 k. Boeing Service Bulletin 747-28-2272 l. Boeing Service Bulletin 747-28-2274 m. Boeing Service Bulletin 747-28-2275 n. Boeing Service Bulletin 747-28A2262 o. Boeing Service Bulletin 747-28A2280 p. Standard Wiring Practices Manual (SWPM) 20-10-11, 20-10-12, 20-10-19, 20-20-00, 20-30-11, 20-30-12, 20-61-11 2. Data supplied with this Service Bulletin: None. ### Page 46 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 46 of 182 BOEING SERVICE BULLETIN 747-28A2281 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. K. Publications Affected 1. Publications 2. Damage Tolerance Based Structural Inspections: Drawing Number Title 284U4218 Aft Equip Center Assy - E8 288U3080 Modular Wire Bundle Instl, E8, Left Aft Equipment Panel 288U4661 Wire Bundle Installation, Upper Sidewall LH, Sta 2163 thru 2360 288U4641 Wire bundle Installation, Upper Sidewall LH, Sta 1983 thru 2163 288U4645 Wire Bundle Installation, Main deck sidewall LH, Sta 1983 thru 2163 288U4651 Wire Bundle Installation, Main deck floor beams LH, Sta 1983 thru 2163 288U4631 Wire Bundle Installation, Main deck floor beams LH, Sta 1723 thru 1983 288U4611 Wire Bundle Installation, Main deck floor beams LH, Sta 1483 thru 1723 288U4431 Wire Bundle Installation, Pressure deck and main deck FLR BMS LH, Sta 1243 thru 1483 288U4411 Wire Bundle Installation, Pressure deck and main deck FLR BMS LH, Sta 997 thru 1243 288U4231 Wire Bundle Installation, Main deck floor beams LH, Sta 723 thru 997 288U4211 Wire Bundle Installation, Main deck floor beams LH, Sta 523 thru 723 288U4151 Wire Bundle Installation, Main deck floor beams LH, Sta 403 thru 523 and aft 400 bulkhead LH 288U4156 Wire Bundle Installation, Main deck floor beams Sta 403 thru 523 LBL 50 to RBL 60 288U4150 Wire Bundle Installation, Main deck floor beams RH, Sta 403 thru 523 AFT Sta 400 bulkhead RH 288U4152 Wire Bundle Installation, Main Electronics Equipment Center RH, Sta 440 thru 460 288U4148 Wire Bundle Installation, Lower Sidewall RH, Sta 403 thru 523 Publication Chapter-Section 747 Maintenance Manual 28-17 747 Fault Isolation Manual 28-31 747 Wiring Diagram Manual 28-21, 28-42, 30-41 747 System Schematic Manual 28-21, 28-42, 30-41 747 Fault Reporting Manual EICAS Status Messages 747 Illustrated Parts Catalog 28-21 ### Page 47 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 47 of 182 BOEING SERVICE BULLETIN 747-28A2281 Boeing has evaluated the repairs and/or changes in this service bulletin for effects on Fatigue Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the Maintenance Program. This service bulletin does not affect FCS, therefore DTIs are not necessary. L. Interchangeability and Intermixability of Parts Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts. ### Page 48 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 48 of 182 BOEING SERVICE BULLETIN 747-28A2281 BLANK PAGE ### Page 49 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 49 of 182 BOEING SERVICE BULLETIN 747-28A2281 2. MATERIAL INFORMATION A. Material - Price and Availability Boeing can supply the kits/parts shown in Paragraph 2.C., Parts Necessary For Each Airplane, and Paragraph 2.D., as shown below. If there is a limit to the quantity (QTY) of available kits/parts, a supply sequence is given by Spares. More kits/parts become available as shown in the Reorder Lead Time (ROLT). ROLT is calculated from the date Boeing gets the purchase order. 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. Reference this service bulletin and submit your purchase order by one of the methods that follow: 1. Order on-line via ATA Spec 2000 or Boeing Part Page 2. Fax to (206) 662-7145 Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: Top Kit Number Name Date QTY ROLT (Weeks) Unit Price thru 015U1808-1 Horizontal Stabilizer Tank Jettison Pump Uncommanded On. (a) 50 (a) (a) (a) For Top Kit availability and pricing contact Boeing Spares. Group 9: Top Kit Number Name Date QTY ROLT (Weeks) Unit Price thru 015U1808-2 Horizontal Stabilizer Tank Jettison Pump Uncommanded On. (a) 1 (a) (a) (a) For Top Kit availability and pricing contact Boeing Spares. Group 16; Group 18, Configuration 2; Group 32-37: Top Kit Number Name Date QTY ROLT (Weeks) Unit Price thru 015U1808-3 Supplemental kit to supply connector and ID tape. (b) ( a )-( a ) ( a ) (a) For Top Kit availability and pricing contact Boeing Spares. (b) Operators who have ordered a 015U1808-1 kit can order the 015U1808-3 kit to complete the airplane installation. If an operator has not ordered the 015U1808-1 kit, the operator will need to order the 015U1808-1 and 015U1808-3 kits to complete the airplane installation. ### Page 50 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 50 of 182 BOEING SERVICE BULLETIN 747-28A2281 3. Spares Customer Support - MC 36-65 Boeing Spares Department P.O. Box 3707 Seattle, Washington 98124-2207 USA B. Industry Support Information Boeing warranty remedies are not available for the configuration changes given in this service bulletin. C. Parts Necessary For Each Airplane 1. Kits/Parts: To get the kits/parts shown below, refer to Paragraph 2.A., Material - Price and Availability. ### Page 51 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 51 of 182 BOEING SERVICE BULLETIN 747-28A2281 NOTE: One top kit and the items shown in Paragraph 2.C.2., Parts and Materials Supplied by the Operator, are necessary for each airplane. The Top Kit is divided into Figure kits for each installation figure shown in the table below. Figure Kit T o p K i t 1 3 1 31 42 22 42 62 73 43 6 015U1808-1 1 1 1 1 - - - - - 1 015U1808-2 - - - - 1 1 1 1 1 - Wire Kit Top Kit 289U1225- 101 289U1225- 102 289U1225- 103 289U1225- 104 015U1808-1 1 1 1 1 015U1808-2 1 1 1 - Wire Kit Top Kit 289U1225- 105 289U1225- 106 015U1808-1 - 1 015U1808-2 1 1 Kit 015U1808-1 - Group 1-2; Group 3, Configuration 1; Group 4-5; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: New Part Number Figure Name Existing Part Number Notes 1 3 13 14 36 Qty 0 0 1 - 1 9 0 8 - 0 0 0 4---- T E R M I N A L B A R R 2 8 4 U 4 0 1 1 - 4 5 1---- RELAY BRACKET ASSY 289T9001-21 - 1 - - - LACING TAPE - RED (135C) 100 FT 289T9001-51 - - - 1 - LACING TAPE - GREEN (135C) 100 FT 289T9001-91 - - 1 - - LACING TAPE - WHITE (135C) 100 FT B A C 2 7 E E L 1 9 4 3 1 1---- M A R K E R B A C 2 7 E E L 2 9 6 9 8 1---- V I N Y L M A R K E R B A C 2 7 E E L 2 9 6 9 9 1---- V I N Y L M A R K E R B A C C 1 0 G E 1 0 ----1 C L A M P , L O O P ### Page 52 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 52 of 182 BOEING SERVICE BULLETIN 747-28A2281 BACC10GE5 2 - - - 1 CLAMP, LOOP B A C J 4 0 A 2 0 - 2 1---- BONDING JUMPER B A C N 1 0 Y R 3 C D 8---- N U T B A C S 1 2 G U 3 K 1 0 4---- S C R E W B A C S 1 2 G U 3 K 84---- S C R E W B A C S 1 2 G U 3 K 91---- S C R E W , C A P B A C S 1 2 H N 0 6 - 7 1---- B O L T B A C S 1 2 H N 3 - 2 0----1 B O L T B A C S 1 2 H N 3 - 3 6 1---- S C R E W B A C S 1 2 H N 3 - 8 ----1 B O L T B H 3 1 5 2---- RELAY,25A,W/ AUX N A S 1 1 4 9 D 0 3 1 6 H 1 0 ---- W A S H E R NAS1149D0332J 10 - - - 2 WASHER NAS42DD6-64FC 2 - - - 1 SPACERS FOR RIVETS Kit 015U1808-2 - Group 9: New Part Number Figure Name Existing Part Number Notes 22 24 26 27 34 Qty 0 0 1 - 1 9 0 8 - 0 0 0 4---- T E R M I N A L B A R R 2 8 4 U 4 0 1 1 - 4 5 1---- RELAY BRACKET ASSY 289T9001-21 - 1 - - - LACING TAPE - RED (135C) 100 FT 289T9001-51 - - - 1 - LACING TAPE - GREEN (135C) 100 FT 289T9001-91 - - 1 - - LACING TAPE - WHITE (135C) 100 FT B A C 2 7 E E L 1 9 4 3 1 1---- M A R K E R B A C 2 7 E E L 2 9 6 9 8 1---- V I N Y L M A R K E R Kit 015U1808-1 - Group 1-2; Group 3, Configuration 1; Group 4-5; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: New Part Number Figure Name Existing Part Number Notes 1 3 13 14 36 Qty ### Page 53 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 53 of 182 BOEING SERVICE BULLETIN 747-28A2281 B A C 2 7 E E L 2 9 6 9 9 1---- V I N Y L M A R K E R B A C C 1 0 G E 1 0 ----1 C L A M P , L O O P BACC10GE5 2 - - - 1 CLAMP, LOOP B A C J 4 0 A 2 0 - 2 1---- BONDING JUMPER B A C N 1 0 Y R 3 C D 8---- N U T B A C S 1 2 G U 3 K 1 0 4---- S C R E W B A C S 1 2 G U 3 K 84---- S C R E W B A C S 1 2 G U 3 K 91---- S C R E W , C A P B A C S 1 2 H N 0 6 - 7 1---- B O L T B A C S 1 2 H N 3 - 2 0----1 B O L T B A C S 1 2 H N 3 - 3 6 1---- S C R E W B A C S 1 2 H N 3 - 8 ----1 B O L T B H 3 1 5 2---- RELAY,25A,W/ AUX N A S 1 1 4 9 D 0 3 1 6 H 1 0 ---- W A S H E R NAS1149D0332J 10 - - - 2 WASHER NAS42DD6-64FC 2 - - - 1 SPACERS FOR RIVETS Kit 289U1225-101 - Group 1-2; Group 3, Configuration 1; Group 4-5; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: New Part Number -101 Name NotesQty 289U1225-101W 1 WIRE - RAW MATERIAL BACC47CN1S 3 CONTACT, PIN BACC47CP1S 3 CONTACT M23053/5-107-4 3 INSULATION SLEEVING, HEAT SHRINKABLE, POLYOLEFIN, FLEXIBLE, X-LINKED Kit 015U1808-2 - Group 9: New Part Number Figure Name Existing Part Number Notes 22 24 26 27 34 Qty ### Page 54 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 54 of 182 BOEING SERVICE BULLETIN 747-28A2281 Kit 289U1225-102 - Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: New Part Number -102 Name NotesQty 289U1225-102W 1 WIRE - RAW MATERIAL BACC47CN1S 3 CONTACT, PIN BACC47CP1S 3 CONTACT M23053/5-107-4 3 INSULATION SLEEVING, HEAT SHRINKABLE, POLYOLEFIN, FLEXIBLE, X-LINKED Kit 289U1225-103 - Group 1-2; Group 3, Configuration 1; Group 4-5; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: New Part Number -103 Name NotesQty 289U1225-103W 1 WIRE - RAW MATERIAL BACC47CN1S 3 CONTACT, PIN BACC47CP1S 3 CONTACT Kit 289U1225-104 - Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: New Part Number -104 Name NotesQty BACC47EG2 3 CONTACT, SOCKET Kit 289U1225-105 - Group 9: New Part Number -105 Name NotesQty 289U1225-105W 1 WIRE - RAW MATERIAL BACC47EG2 3 CONTACT, SOCKET ### Page 55 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 55 of 182 BOEING SERVICE BULLETIN 747-28A2281 Kit 289U1225-106 - Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: New Part Number -106 Name NotesQty 289U1225-106W 1 WIRE - RAW MATERIAL BACC47CN1S 3 CONTACT, PIN BACC47CP1S 3 CONTACT BACC47CP3T 7 CONTACT BACT12AC12 7 TERMINAL, LUG BACT12AC2 21 TERMINAL, LUG BACT12E10 13 TERMINAL, LUG D436-38 3 SPLICE Kit 015U1808-3 - Group 16; Group 18, Configuration 2; Group 32-37: New Part Number -3 Name Existing Part Number NotesQty 289U1225-10701 1 ID TAPE - CONNECTOR 289U1225-10801 1 ID TAPE - CONNECTOR BACC45FN16- 24S6 1 CONNECTOR, ELECTRICAL, RECEPTACLE, FLANGE MOUNT, BAYONET COUPLING BACC45FT16- 24P6 1 CONNECTOR, ELECTRICAL, PLUG, STRAIGHT, BAYONET COUPLING BACC47CN1S 2 CONTACT, PIN BACC47CP1S 2 CONTACT, SOCKET BACN10JC04CM 3 NUT BACS12HN04U6 3 SCREW NAS1149DN332J 3 WASHER, PLAIN ### Page 56 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 56 of 182 BOEING SERVICE BULLETIN 747-28A2281 2. Parts and Materials Supplied by the Operator: 3. Parts Modified and Reidentified: None. 4. Parts Removed and Not Replaced: None. D. Parts Necessary to Change Spares None. E. Special Tooling - Price and Availability None. F. Special Tooling Necessary to do this Service Bulletin No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine operator tool supply to make sure all necessary tools are available. Part Number / Specification QTY Name Notes BMS 10-11, TYPE 1 1 pt PRIMER (a) BMS 5-95 1 pt SEALANT (a) NAS1149D616H or equivalent 1 Washer (b) BACN10YR06CD or equivalent 1N u t ( b ) (a) See the Qualified Products List at the end of the Boeing Material Specification (BMS) for supplier data. (b) If relay mounting bracket hole requires relocation (see Figure 1, Circle Note 3) these parts or equivalent may be required. ### Page 57 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 57 of 182 BOEING SERVICE BULLETIN 747-28A2281 3. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION CAUTION: KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL, METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR OTHER ELECTRICAL DAMAGE. NOTE: 1. The instructions identified in Paragraph 3.B. Work Instructions and the Figures(s) give the recommended sequence of steps. The sequence of steps to do this service bulletin can be changed. 2. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for definition of the acronyms. 3. Obey all of the warnings and cautions given in the specified manual sections. 4. Unless shown differently, these dimensions and tolerances are used: — Linear dimensions are in inches. — Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03 inch. — Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch. — Hole dimensions for standard solid rivets are in 747 SRM, Chapter 51. — Torque limits to tighten nuts and bolts are in 747 SRM, Chapter 51. 5. Use the approved fastener and process material substitutions in accordance with 747 SRM, Chapter 51. 6. Refer to the SWPM 20-10-11 and SWPM 20-10-12 for the wire installation procedures, and SWPM 20-10-19 for wire separation requirements, as accepted procedures. 7. The necessary conditions for selection of a clamp and clamp size are included in SWPM 20-10-12. If the clamp size for the wire harness supports specified in this service bulletin does not make a correct fit on the wire bundle, refer to SWPM 20-10-12 as an accepted procedure to select the correct clamp. 8. If the length of any fastener specified in this service bulletin does not meet the installation standards in 747 SRM, Chapter 51, then a fastener of the same specification, or an approved substitute, with a length which meets the installation standards in 747 SRM, Chapter 51 may be used. 9. These work instructions refer to procedures included on other Boeing documents. When the words "refer to" are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used. When the words "as given in" are included in the instruction, the procedure in the Boeing document must be used. B. WORK INSTRUCTIONS Group 3, Configuration 2; Group 5, Configuration 1; Group 6, Configuration 1; Group 15, ### Page 58 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 58 of 182 BOEING SERVICE BULLETIN 747-28A2281 Configuration 1; Group 17, Configuration 1; Group 18, Configuration 1; Group 19, Configuration 2; Group 23, Configuration 1: Airplanes 1. Airplanes - No work is necessary for airplanes in this configuration. The airplanes in this configuration do not have active Horizontal Stabilizer Tanks. Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: Airplanes 1. Gain access to the rework area as follows: a. If the airplane has a crew rest located over door 5 remove the sidewall partitions as necessary for access to the E-8 shelf and wire bundle routing, refer to 747-400 AMM 25-76-02. b. If the airplane has no crew rest located over door 5 remove the ceiling and lower side wall linings (station 2320 to 2300) as necessary for access to E-8 shelf and wire bundle routing, refer to 747-400 AMM 25-21-01 and 747-400 AMM 25-22-01 as accepted procedures. c. Remove the ceiling panels in the passenger compartment (station 2310 to station 2100 and some airplanes to station 1980) as necessary for access to the outer portion of the sidewall where required for routing of ships wire bundles, refer to 747-400 AMM 25-22-01 as an accepted procedure. d. Remove the ceiling panels in the rear cargo compartment (station 2100 or station 1980 to station 1480 as necessary for access to the cargo compartment ceiling where required for routing of ships wire bundles, refer to 747-400 AMM 25-52-01 as an accepted procedure. e. Remove the floor panels on the main deck (station 1480 to station 980) as necessary for access to the wire bundles that route between the forward cargo compartment and the aft cargo compartment, refer to 747-400 AMM 53-21-02 as an accepted procedure. Some airplanes may have the wire bundle routed in a conduit and removal of the floor panels may not be required. f. Remove cargo ceiling linings in the forward cargo compartment (station 980 to station 400) as necessary to access the wire bundles that route in the forward cargo compartment ceiling and to the main equipment bay, refer to 747-400 AMM 25-52-01 as an accepted procedure. NOTE: Operators should check their applicable wiring configurations to determine how much access will be required. 2. Remove electrical power from the airplane, refer to 747-400 AMM 24-22-00 as an accepted procedure. 3. Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: Install new relays on the E-8 shelf as given in Figure 1. ### Page 59 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 59 of 182 BOEING SERVICE BULLETIN 747-28A2281 4. Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: Make wiring changes using the routing shown, for wire bundles W4488 and W4588, as given in Figure 2 and for wire bundle routing for wire bundle W3851, as given in Figure 36. 5. Group 1, 8, 10-12; Group 18, Configuration 2; Group 19, Configuration 1; Group 32, 34-35: Make wiring changes to wire bundle W4488 as given in Figure 3 and Figure 2 6. Group 7: Make wiring changes to wire bundle W4488 as given in Figure 4 and Figure 2. 7. Group 4, 14; Group 15, Configuration 2; Group 17, Configuration 2: Make wiring changes to wire bundle W4488 as given in Figure 5 and Figure 2. 8. Group 2, 30-31, 33, 37: Make wiring changes to wire bundle W4488 as given in Figure 6 and Figure 2. 9. Group 16: Make wiring changes to wire bundle W4488 as given in Figure 7 and Figure 2. 10. Group 20, 29: Make wiring changes to wire bundle W4488 as given in Figure 37 and Figure 2 11. Group 6, Configuration 2; Group 23, Configuration 2; Group 24: Make wiring changes to wire bundle W4488 as given in Figure 38 and Figure 2. 12. Group 3, Configuration 1; Group 21-22: Make wiring changes to wire bundle W4488 as given in Figure 39 and Figure 2. 13. Group 5, Configuration 2; Group 13, 25-28, 36: Make wiring changes to wire bundle W4488 as given in Figure 40 and Figure 2. 14. Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7; Group 15, Configuration 2; Group 17, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-31: Make wiring changes to wire bundle W4588 as given in Figure 8 and Figure 2. 15. Group 18, Configuration 2; Group 32-33, 36-37: Make wiring changes to wire bundle W4588 as given in Figure 44 and Figure 2. ### Page 60 Original Issue: December 13, 2007 Revision 1: November 25, 2009 747-28A2281 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 60 of 182 BOEING SERVICE BULLETIN 747-28A2281 16. Group 12: Make wiring changes to wire bundle W4588 as given in Figure 9 and Figure 2. 17. Group 11, 13: Make wiring changes to wire bundle W4588 as given in Figure 10 and Figure 2. 18. Group 16, 35: Make wiring changes to wire bundle W4588 as given in Figure 45 and Figure 2. 19. Group 8, 14: Make wiring changes to wire bundle W4588 as given in Figure 11 and Figure 2. 20. Group 34: Make wiring changes to wire bundle W4588 as given in Figure 46 and Figure 2. 21. Group 10: Make wiring changes to wire bundle W4588 as given in Figure 12 and Figure 2. 22. Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 17, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-31: Make wiring changes to wire bundle W3845 as given in Figure 13. 23. Group 16; Group 18, Configuration 2; Group 32-37: Make wiring changes to wire bundle W3845 as given in Figure 47. 24. Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 19, Configuration 1; Group 20-22; Group 23, Configuration 2; Group 24-37: Make wiring changes to wire bundle W4758 as given in Figure 14. See Figure 2 and 35 for MAWEA card file location and wire routing information. 25. Group 1-2; Group 3, Configuration 1; Group 4; Group 5, Configuration 2; Group 6, Configuration 2; Group 7-8, 10-14; Group 15, Configuration 2; Group 16; Group 17, Configuration 2; Group 18, Configuration 2; Group 20, 22; Group 23, Configuration 2; Group 24-25, 28, 32-36: Make wiring changes to wire bundle W3851 and route wiring as given in Figure 15 and Figure 36. 26. Group 19, Configuration 1; Group 21, 26-27, 29-31, 37: Make wiring changes to wire bundle W3851 and route wiring as given in Figure 41 and Figure 36. The text continues at https://openairdocs.org/service-documents/boeing/747-28a2281/file/f88302e414dc.md?from=61 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.