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Commercial Airplanes 747 Service Bulletin ALERT Number: 747-28A2331 Original Issue: April 02, 2012 ATA System: 2822 SUBJECT: FUEL - Engine Fuel Feed System - Engine Fuel Suction Feed Operational Test Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2012 Boeing.
Unpublished Work. All Rights Reserved.
Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner™, BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing. BOEING is a trademark of Boeing Management Company.
Original Issue: April 02, 2012 747-28A2331 1 of 29
5.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 02, 2012 747-28A2331 2 of 29 BOEING SERVICE BULLETIN 747-28A2331
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Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 1 4 B. Concurrent Requirements ...................................... 1 4 C. Reason ................................................ 1 4 D. Description .............................................. 1 5 E. Compliance .............................................. 1 6 F. Approval ............................................... 1 8 G. Manpower .............................................. 1 8 H. Weight and Balance Changes .................................... 1 9 I. Electrical Load Data ......................................... 1 9 J. References .............................................. 1 9
1. Existing Data: ......................................... 1 9
2. Data Supplied with this Service Bulletin: ........................... 1 9
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 1 9 K. Publications Affected ........................................ 1 9 L. Interchangeability and Intermixability of Parts ........................... 2 0 M. Software Accomplishment Summary ................................ 2 0
2. MATERIAL INFORMATION ........................................ 2 1 A. Material - Price and Availability ................................... 2 1 B. Industry Support Information .................................... 2 1 C. Parts Necessary for Each Airplane ................................. 2 1
1. Kits/Parts ............................................ 2 1
2. Parts and Materials Supplied by the Operator ........................ 2 1
3. Parts Modified and Reidentified ................................ 2 1
4. Parts Removed and Not Replaced .............................. 2 1 D. Parts Necessary to Change Spares ................................. 2 1 E. Special Tooling - Price and Availability ............................... 2 1 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 1
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 3 A. GENERAL INFORMATION ..................................... 2 3 B. WORK INSTRUCTIONS ....................................... 2 3 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 02, 2012 747-28A2331 3 of 29 BOEING SERVICE BULLETIN 747-28A2331
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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 02, 2012 747-28A2331 4 of 29 BOEING SERVICE BULLETIN 747-28A2331
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Commercial Airplanes 747 Service Bulletin ALERT SummaryNumber: 747-28A2331Original Issue: April 02, 2012 ATA System: 2822 SUBJECT: FUEL - Engine Fuel Feed System - Engine Fuel Suction Feed Operational Test
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 None.
BACKGROUND This service bulletin provides instructions to operators to perform an Engine Fuel Suction Feed Operational Test on each engine individually. This test is required in order to protect against engine flameout during suction feed operations. The instructions given in this service bulletin are provided to detect and correct failure of the engines fuel suction feed of the fuel system, which could result in dual engine flameout and inability to restart the engines, and consequent forced landing of the airplane.
Accomplishing the fuel system suction feed test and continuing to repeat the testing within the specified compliance times will reduce the possibility of an engine flameout resulting from air ingestion into the engine fuel feed system during low fuel level conditions with inoperative boost pumps .
An operator reported a 737-400 Engine No. 1 flameout during cruise. The Engine No. 2 continued to operate normally. The flight crew conducted two restart attempts within the start envelope with no success then diverted uneventfully. Another operator reported a 737-300 Engine No. 2 shut down when the start lever was placed in the idle position during taxi to the gate. The Engine number 1 continued to operate normally. Maintenance performed a vacuum test of the engine fuel feed system and found a crack in a fuel feed tube. The fuel feed tube was replaced and the vacuum test of the fuel feed system was performed and passed successfully.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
ReferenceAffectedPlanning Data Paragraph 1.E., ComplianceYesAD Related ACTION The WORK PACKAGES can be done in any order.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 02, 2012 747-28A2331 5 of 29
Each engine must successfully complete the Fuel Suction Feed - Operational Test.
WORK PACKAGE 1 - ENGINE NO. 1 - FUEL SUCTION FEED - OPERATIONAL TEST
1. Do the Engine No. 1 - Fuel Suction Feed - Operational Test.
2. If the Fuel Suction Feed Operational Test fails isolate the cause of the leak, repair, and repeat the test.
WORK PACKAGE 2 - ENGINE NO. 2 - FUEL SUCTION FEED - OPERATIONAL TEST
1. Do the Engine No. 2 - Fuel Suction Feed - Operational Test.
2. If the Fuel Suction Feed Operational Test fails isolate the cause of the leak, repair, and repeat the test.
WORK PACKAGE 3 - ENGINE NO. 3 - FUEL SUCTION FEED - OPERATIONAL TEST
1. Do the Engine No. 3 - Fuel Suction Feed - Operational Test.
2. If the Fuel Suction Feed Operational Test fails isolate the cause of the leak, repair, and repeat the test.
WORK PACKAGE 4 - ENGINE NO. 4 - FUEL SUCTION FEED - OPERATIONAL TEST
1. Do the Engine No. 4 - Fuel Suction Feed - Operational Test.
2. If the Fuel Suction Feed Operational Test fails isolate the cause of the leak, repair, and repeat the test.
EFFECTIVITY 747-100/-100B/-100B SUD/-200B/200C/-200F/-300/747SP/747SR Airplane(s). Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s).
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.
Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2007-NM-356-AD, is related to this service bulletin.
Boeing recommends that the Engine Suction Fuel Feed Operational Test given in this service bulletin be done 30,000 Flight Hours after the original issue date of this service bulletin.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the Operational Test given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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MATERIAL INFORMATION None.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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Commercial Airplanes 747 Service Bulletin ALERT Number: 747-28A2331 Original Issue: April 02, 2012 ATA System: 2822 SUBJECT: FUEL - Engine Fuel Feed System - Engine Fuel Suction Feed Operational Test
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 This service bulletin is for the airplane(s) shown below.
Refer to Service Bulletin Index D6-30300 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP 747-100, 100B, -100 SUD, -200B, -200C, -200F, -300, 747SP and 747SR airplanes -1 Airplane Models:
747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SP, 747SR GroupVariable Number 1RA001 - RA034 1RA101 - RA115 1RA161 - RA164 1RA201 - RA203 1RA216 - RA217 1RA245 - RA246 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 02, 2012 747-28A2331 9 of 29
GroupVariable Number 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 1RB721 - RB723 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1RB741 - RB748 1RD001 - RD004 1RD021 - RD022 1RD041 - RD059 1RD071 - RD072 1RD081 - RD083 1RD091 - RD092 1RD101 - RD104 1RD121 - RD127 1RD131 - RD144 1RD166 - RD167 1RD171 - RD172 1RD181 - RD183 1RD201 - RD204 1RD221 - RD227 1RD231 - RD235 1RD241 - RD243 1RD251 - RD262 1RD271 - RD272 1RD291 - RD292 1RD301 - RD302 1RD311 1RD351 - RD358 1RD361 - RD366 1RD381 - RD383 1RD411 - RD414 1RD421 - RD426 1RD431 - RD435 1RD441 - RD442 1RD451 - RD456 1RD461 1RD471 - RD475 1RD513 - RD519 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1RD531 - RD533 1RD551 1RD561 1RD571 1RD581 - RD583 1RD591 - RD593 1RD601 - RD607 1RD621 - RD623 1RD641 - RD649 1RD651 - RD659 1RD661 1RD671 1RD681 - RD682 1RD691 - RD692 1RD701 - RD702 1RD721 - RD722 1RD741 - RD742 1RD751 - RD755 1RD761 1RD771 - RD775 1RD781 - RD783 1RD791 - RD792 1RE001 1RG001 - RG009 1RG091 1RG095 1RG101 - RG104 1RG121 - RG126 1RG141 - RG142 1RG161 - RG164 1RG171 - RG174 1RG191 - RG193 1RG211 - RG213 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 02, 2012 747-28A2331 12 of 29 BOEING SERVICE BULLETIN 747-28A2331