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Commercial Airplanes 747 Service Bulletin Number: 747-29A2114 Original Issue: October 01, 2009 Revision 1: July 15, 2010 ATA System: 2911 SUBJECT: HYDRAULIC POWER - Main Hydraulic Supply System - Wire Bundle Inspection and Wire Routing Change Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2009 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the Boeing livery are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 01, 2009 747-29A2114Revision 1: July 15, 2010 1 of 43
2.0
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 01, 2009 747-29A2114Revision 1: July 15, 2010 2 of 43 BOEING SERVICE BULLETIN 747-29A2114
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Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION ........................................ 1 1 A. Effectivity ............................................... 1 1
1. Airplanes ............................................ 1 1
2. Spares Affected ........................................ 1 2 B. Concurrent Requirements ...................................... 1 2 C. Reason ................................................ 1 3 D. Description .............................................. 1 3 E. Compliance .............................................. 1 4 F. Approval ............................................... 1 4 G. Manpower .............................................. 1 4 H. Weight and Balance Changes .................................... 1 6 I. Electrical Load Data ......................................... 1 6 J. References .............................................. 1 6
1. Existing Data .......................................... 1 6
2. Data supplied with this Service Bulletin ............................ 1 6
3. Installation Drawings Used in the Preparation of this Service Bulletin ............ 1 6 K. Publications Affected ........................................ 1 7 L. Interchangeability and Intermixability of Parts ........................... 1 7
2. MATERIAL INFORMATION ........................................ 1 9 A. Material - Price and Availability ................................... 1 9 B. Industry Support Information .................................... 1 9 C. Parts Necessary For Each Airplane ................................. 1 9
1. Kits/Parts ............................................ 1 9
2. Parts and Materials Supplied by the Operator ........................ 2 0
3. Parts Modified and Reidentified ................................ 2 0
4. Parts Removed and Not Replaced .............................. 2 0 D. Parts Necessary to Change Spares ................................. 2 0 E. Special Tooling - Price and Availability ............................... 2 0 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 0
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 1 A. GENERAL INFORMATION ..................................... 2 1 B. WORK INSTRUCTIONS ....................................... 2 2 FIGURE 1: LEFT WING - WIRE BUNDLE INSPECTION ......................... 2 6 FIGURE 2: LEFT WING - WIRE BUNDLE CHANGE ........................... 2 9 FIGURE 3: LEFT WING - GIVE WIRE BUNDLE SLACK ......................... 3 2 FIGURE 4: RIGHT WING - WIRE BUNDLE INSPECTION ........................ 3 5 FIGURE 5: RIGHT WING - WIRE BUNDLE CHANGE .......................... 3 8 FIGURE 6: RIGHT WING - GIVE WIRE BUNDLE SLACK ........................ 4 1
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Original Issue: October 01, 2009 747-29A2114Revision 1: July 15, 2010 3 of 43 BOEING SERVICE BULLETIN 747-29A2114
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 01, 2009 747-29A2114Revision 1: July 15, 2010 4 of 43 BOEING SERVICE BULLETIN 747-29A2114
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Commercial Airplanes 747 Service Bulletin Revision Transmittal SheetNumber: 747-29A2114Original Issue: October 01, 2009 Revision 1: July 15, 2010 ATA System: 2911 SUBJECT: HYDRAULIC POWER - Main Hydraulic Supply System - Wire Bundle Inspection and Wire Routing Change 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.
Airplane RT043 was added to Group 1 of this service bulletin effectivity.
REASON FOR REVISION As a part of a service bulletin validation program, this change was completed on RT436 by Service Bulletin 747-29A2114 Original Issue before the release of Revision 1 of this service bulletin. The change completed on airplane RT436 by Service Bulletin 747-29A2114 Original Issue is equivalent to the release of Revision 1 of this service bulletin. Airplane RT436 has the configuration of a Group 1 airplane.
This Revision is sent to incorporate findings of the validation of the service bulletin.
The following section of the service bulletin were changed:
1. In Summary, Background, Service Bulletin validation information has been added.
2. In Paragraph 1.A., Effectivity, airplane RT043 was added to Group 1.
3. In Paragraph 1.C., Reason, Service Bulletin validation information has been added.
4. In Paragraph 2.C., Parts Necessary For Each Airplane, Parts information was added.
5. In Figure 2, and Figure 5, Step 11, added note (a).
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 October 01, 2009Original Issue:
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Original Issue: October 01, 2009 747-29A2114Revision 1: July 15, 2010 5 of 43
July 15, 2010Revision 1:
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Commercial Airplanes 747 Service Bulletin SummaryNumber: 747-29A2114Original Issue: October 01, 2009 Revision 1: July 15, 2010 ATA System: 2911 SUBJECT: HYDRAULIC POWER - Main Hydraulic Supply System - Wire Bundle Inspection and Wire Routing Change
CONCURRENT REQUIREMENTS Refer to Paragraph 1.B., Concurrent Requirements.
BACKGROUND This service bulletin is issued to do a General Visual Inspection of two wire bundles in the number two and number three engine pylons near the leading edge and to change the wire routing if necessary. If the wire bundles have an incorrect wire routing where they go across a fuel feed tube, damage from chaffing can occur to the wire bundle or the fuel feed tube. If damage to the wire bundle or fuel feed tube occurs, it could cause fuel leaks and arcing and could cause a fire in the number two or number three engine pylon.
PRR 82874 was issued in 1991 to give a design change to these areas to give better separation between several wire bundles and the fuel tubes. As a part of this PRR, the routing of wire bundles for the Alternating Current (AC) motor-driven pump was also changed to give better clearance from the fuel feed tubes. Service bulletin 747-24A2168 was issued to install support brackets to change the clearance between the fuel tube and the power feeder cables in the number two and the number three engine pylons. In 2007, Boeing received a report of a PW4056 powered 747-400 airplane that arrived at a gate with fuel leak from the drain line of the number two engine pylon. An investigation found the AC motor-driven pump wire bundle touched the fuel feed tube which caused chaffing and the leak.
This service bulletin gives operators instructions to do a General Visual Inspection of the wire routing near the wing leading edge and the number two and the number three engine pylons. Instructions are given to change the routing configuration for the wire bundles.
Boeing Service Related Problem (SRP) 747-SRP-28-0121 is related to this service bulletin.
As a part of a service bulletin validation program, this change was completed on airplane RT436 by Service Bulletin 747-29A2114 Original Issue before the release of Revision 1 of this service bulletin. The change completed on airplane RT436 by Service Bulletin 747-29A2114 Original Issue is equivalent to the release of Revision 1 of this service bulletin. Airplane RT436 has the configuration of a Group 1 airplane.
ACTION (PRR 85901-97RS) Work Package 1 - Get access to the fuel feed tube and wire bundle in the number two pylon area. Do a General Visual Inspection for wire routing between the fuel feed tube and wire bundle. If routing is incorrect, do a General Visual Inspection of the wire bundle and the fuel feed tube, and move the wire bundle above the support bracket as given in Work Package 2. If wire bundle routing goes above the support bracket, no more work is necessary.
Close access and put the airplane back to the serviceable condition.
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Work Package 2 - Get access to the fuel feed tube and wire bundle in the number two pylon area. Move the wire bundle above the support bracket. Close access and put the airplane back to the serviceable condition.
Work Package 3 - Get access to the fuel feed tube and wire bundle in the number three pylon area. Do a General Visual Inspection for for wire routing between the fuel feed tube and wire bundle. If routing is incorrect, do a General Visual Inspection of the wire bundle and the fuel feed tube, and move the wire bundle above the support bracket as given in Work Package 4. If wire bundle routing goes above the support bracket, no more work is necessary. Close access and put the airplane back to the serviceable condition.
Work Package 4 - Get access to the fuel feed tube and wire bundle in the number three pylon area. Move the wire bundle above the support bracket. Close access and put the airplane back to the serviceable condition.
EFFECTIVITY 747-400/ -400D 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 the inspection and if necessary, the changes given in this service bulletin be done within 24 months after the original issue date of this service bulletin.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the configuration given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
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BOEING SERVICE BULLETIN 747-29A2114
LEFT WING SHOWN
RIGHT WING OPPOSITE
- GET ACCESS TO THE LEFT FUEL FEED TUBE AND WIRE BUNDLE.
DO A GENERAL VISUAL INSPECTION FUEL FEED FOR CORRECT WIRE ROUTING.
TUBE
IF NECESSASARY, CHANGE THE WIRE ROUTING CONFIGURATION.
1814693 Original Issue: October 01, 2009 Revision 1: July 15, 2010 747-29A2114
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Commercial Airplanes 747 Service Bulletin Number: 747-29A2114 Original Issue: October 01, 2009 Revision 1: July 15, 2010 ATA System: 2911 SUBJECT: HYDRAULIC POWER - Main Hydraulic Supply System - Wire Bundle Inspection and Wire Routing Change
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 85901-97RS and PRR 82874 for data about this change.
DESCRIPTIONCONFIGURATIONGROUP Some 747-400/-400D airplanes with AC motor-driven pumps at the strut 2 and 3 location.
-1 Airplane Models:
747-400, 747-400D GroupVariable Number 1RT001 - RT007 1RT021 - RT022 1RT031 - RT033 1RT041 - RT047 1RT071 - RT072 1RT101 - RT103 1RT121 1RT131 1RT401 - RT410
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GroupVariable Number 1RT431 - RT438 1RT471 - RT489 1RT501 - RT512 1RT531 - RT533 1RT551 - RT564 1RT591 1RT631 - RT633 1RT641 - RT654 1RT671 - RT672 1RT681 - RT682 1RT691 - RT693 1RT701 - RT703 1RT711 - RT712 1RT741 - RT742 1RT751 - RT753 1RT776 - RT777 1RU801 - RU802
2. Spares Affected None.
B. Concurrent Requirements The service bulletin listed below must be done before this service bulletin:
DescriptionService BulletinCompany This service bulletin is issued to inspect the clearance between the fuel tube and the power feeder cable in number 2 and 3 strut, and to install the power feeder support bracket to separate the cable from the fuel tube.
747-24A2168, Revision 1, Revision 2 or Revision 3.
Boeing
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