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Commercial Airplanes 747 Service Bulletin ALERT Number: 747-28A2204 Original Issue: December 19, 1996 Revision 3: March 11, 2010 ATA System: 2822 SUBJECT: FUEL - Distribution - Engine Fuel Feed System Outboard Main Tank Boost Pump Wiring Inspection 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 1996 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.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: December 19, 1996 747-28A2204Revision 3: March 11, 2010 1 of 28
5.0
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 2 of 28 BOEING SERVICE BULLETIN 747-28A2204
ALERTALERT
BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION ........................................ 1 1 A. Effectivity ............................................... 1 1
1. Airplanes ............................................ 1 1
2. Spares Affected ........................................ 2 0 B. Concurrent Requirements ...................................... 2 0 C. Reason ................................................ 2 0 D. Description .............................................. 2 1 E. Compliance .............................................. 2 1 F. Approval ............................................... 2 1 G. Manpower .............................................. 2 2 H. Weight and Balance Changes .................................... 2 2 I. Electrical Load Data ......................................... 2 2 J. References .............................................. 2 2
1. Existing Data: ......................................... 2 2
2. Data supplied with this Service Bulletin: ........................... 2 3
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 3 K. Publications Affected ........................................ 2 3 L. Interchangeability and Intermixability of Parts ........................... 2 3
2. MATERIAL INFORMATION ........................................ 2 5 A. Material - Price and Availability ................................... 2 5 B. Industry Support Information .................................... 2 5 C. Parts Necessary For Each Airplane ................................. 2 5
1. Kits/Parts: ........................................... 2 5
2. Parts and Materials Supplied by the Operator: ........................ 2 5
3. Parts Modified and Reidentified: ............................... 2 5
4. Parts Removed and Not Replaced: .............................. 2 5 D. Parts Necessary to Change Spares ................................. 2 5 E. Special Tooling - Price and Availability ............................... 2 5 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 5
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 7 A. GENERAL INFORMATION ..................................... 2 7 B. WORK INSTRUCTIONS ....................................... 2 7 FIGURE 1: BOOST PUMP REFERENCE LOCATOR ........................... 2 8
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 3 of 28 BOEING SERVICE BULLETIN 747-28A2204
ALERTALERT
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 4 of 28 BOEING SERVICE BULLETIN 747-28A2204
ALERTALERT
BLANK PAGE
Commercial Airplanes 747 Service Bulletin ALERT Revision Transmittal SheetNumber: 747-28A2204Original Issue: December 19, 1996 Revision 3: March 11, 2010 ATA System: 2822 SUBJECT: FUEL - Distribution - Engine Fuel Feed System Outboard Main Tank Boost Pump Wiring Inspection This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive FAA AD 97-26-07, is related to this service bulletin.
No more work is necessary on airplanes inspected as shown in the revision 2 of this service bulletin.
747 airplanes line number 1317 - 1419 are added to effectivity.
REASON FOR REVISION This revision is sent to tell operators that Compliance is revised. Operators have reported finding fuel pump wire bundle chafing of Teflon sleeving, jacket and wire installation before 30,000 flight cycles, or 60,000 flight hours.
The wire bundle chafing could possibly wear away the sleeving, jacket and wire installation and expose metal conductors, which could result in electrical arcing. Boeing recommends that the operators accomplish the wiring inspection given in this service bulletin within 15,000 flight hours from the last inspection, or 6,000 flight hours from the date of this revision, whichever occurs later, but not to exceed 60,000 flight hours from the last inspection.
The inspection will be required to be repeated every 15,000 flight hours from the previous inspection.
Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location of important changes.
Airplanes are added to effectivity. Refer to Paragraph 1.A., Effectivity.
Pages with no vertical lines have no important changes.
REVISION HISTORY December 19, 1996Original Issue:
October 30, 1997Revision 1:
September 01, 2005Revision 2:
March 11, 2010Revision 3:
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 5 of 28
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 6 of 28 BOEING SERVICE BULLETIN 747-28A2204
ALERTALERT
BLANK PAGE
Commercial Airplanes 747 Service Bulletin ALERT SummaryNumber: 747-28A2204Original Issue: December 19, 1996 Revision 3: March 11, 2010 ATA System: 2822 SUBJECT: FUEL - Distribution - Engine Fuel Feed System Outboard Main Tank Boost Pump Wiring Inspection
THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH
1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.
CONCURRENT REQUIREMENTS Boeing service bulletin 747-28A2092 or 747-28A2165, is necessary to be accomplished prior to or concurrent with this service bulletin.
BACKGROUND This inspection will make sure the number 1 and number 4 main fuel tank boost pump wiring is not chafed and will not cause arcing inside the fuel tank.
The number 1 and number 4 main fuel tank boost pump wiring is installed with a double layer of Teflon sleeving in the conduit. The sleeving is installed to prevent arcing between the boost pump power wiring and the conduit caused by wire chafing.
747 airplanes cumulative line numbers 329, 348 and 356 and on had the two sleeves installed in production.
All other airplanes were the subject of Alert Service Bulletin 747-28A2092 or 747-28A2165 which inspected the boost pump wiring for damage and installed the two sleeves.
747 airplanes cumulative line numbers 001-432 have aluminum conduits for the main tank boost pumps. All other 747 airplanes have stainless steel conduits. If the boost pump power wiring shorts to the conduit, it is more likely that the aluminum conduit can melt and make a hole. This could result in a fuel leak, fire or an explosion.
We have not been told that chafed wires have caused any conduits to be melted through since Service Bulletin 747-28A2092 was issued.
ACTION Remove the number 1 and number 4 main tank forward and aft boost pump cover plates. Remove the boost pump wire bundle from the conduit. Inspect the sleeving/wire bundle for damage. Install the boost pump cover plates. Do a test of the boost pumps.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 7 of 28
EFFECTIVITY All 747 Airplanes line number 0001-1419.
Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes.
COMPLIANCE Refer to Paragraph 1.E., Compliance.
For all 747 series airplanes, certificated in any category, FAA AD 97-26-07, is related to this service bulletin and supersedes FAA AD 96-26-06, Amendment 39-9870.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection given in this service bulletin.
MANPOWER Total Man-hours - 4.0 for each airplane Elapsed Time - 2.0 Hours
MATERIAL INFORMATION Operator Supplied Parts
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 8 of 28 BOEING SERVICE BULLETIN 747-28A2204
ALERTALERT
BOEING SERVICE BULLETIN 747-28A2204
ALERT ALERT
LEFT SIDE SHOWN (RIGHT SIDE SIMILAR) NO. 1 OR NO. 4
MAIN TANK NO. 2 OR NO. 3
MAIN TANK FWD
- INBD
DO AN INSPECTION OF THE WIRE BUNDLE R99006 IN THE CONDUIT.
Original Issue: December 19, 1996 Revision 3: March 11, 2010 747-28A2204
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 28
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 10 of 28 BOEING SERVICE BULLETIN 747-28A2204
ALERTALERT
BLANK PAGE
Commercial Airplanes 747 Service Bulletin ALERT Number: 747-28A2204 Original Issue: December 19, 1996 Revision 3: March 11, 2010 ATA System: 2822 SUBJECT: FUEL - Distribution - Engine Fuel Feed System Outboard Main Tank Boost Pump Wiring Inspection
THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH
1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.
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.
DESCRIPTIONCONFIGURATIONGROUP All 747 Airplanes Line Numbers 0001-1419-1 Airplane Models:
747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SP, 747SR GroupVariable Number 1RA001 - RA034 1RA101 - RA115 1RA161 - RA164 1RA201 - RA203 1RA216 - RA217
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 11 of 28
GroupVariable Number 1RA245 - RA246 1RA251 - RA266 1RA301 - RA318 1RA351 - RA360 1RA369 - RA373 1RA401 - RA418 1RA501 - RA502 1RA521 - RA528 1RA532 - RA548 1RA551 - RA552 1RA559 - RA561 1RA581 - RA582 1RA585 1RA601 - RA602 1RA631 - RA635 1RA651 - RA652 1RA671 - RA677 1RA701 - RA702 1RA721 - RA731 1RA741 - RA745 1RA749 - RA750 1RA761 - RA762 1RA781 - RA784 1RA901 - RA916 1RB001 - RB016 1RB041 - RB044 1RB071 - RB075 1RB101 - RB102 1RB411 - RB413 1RB421 1RB601 - RB607 1RB681 - RB697 1RB711
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 19, 1996 747-28A2204Revision 3: March 11, 2010 12 of 28 BOEING SERVICE BULLETIN 747-28A2204