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Commercial Airplanes 747 Service Bulletin ALERT Number: 747-25A3581 Original Issue: September 23, 2010 Revision 1: June 30, 2011 ATA System: 2500 SUBJECT: EQUIPMENT/FURNISHINGS - Cargo and Accessory Compartments - M826 Cardfile Drip Shield 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.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: September 23, 2010 747-25A3581Revision 1: June 30, 2011 1 of 55
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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 23, 2010 747-25A3581Revision 1: June 30, 2011 2 of 55 BOEING SERVICE BULLETIN 747-25A3581
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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 5 I. Electrical Load Data ......................................... 1 5 J. References .............................................. 1 5
1. Existing Data .......................................... 1 5
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 6 L. Interchangeability and Intermixability of Parts ........................... 1 6
2. MATERIAL INFORMATION ........................................ 1 7 A. Material - Price and Availability ................................... 1 7 B. Industry Support Information .................................... 1 7 C. Parts Necessary For Each Airplane ................................. 1 7
1. Kits/Parts ............................................ 1 7
2. Parts and Materials Supplied by the Operator ........................ 1 9
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: ELECTRONICS EQUIPMENT CENTER - REMOVAL OF EXISTING DRIP SHIELD .... 2 3 FIGURE 2: ELECTRONICS EQUIPMENT CENTER - LOOSEN AFFECTED WIRE BUNDLES .... 2 8 FIGURE 3: ELECTRONICS EQUIPMENT CENTER - PROVISIONS FOR WIRE BUNDLE RELOCATION .................................................. 3 2 FIGURE 4: ELECTRONICS EQUIPMENT CENTER - RELOCATE WIRE BUNDLES ROUTING . . . 37 FIGURE 5: ELECTRONICS EQUIPMENT CENTER - INSTALLATION OF ALL SUPPORT BRACKETS AND NEW DRIP SHIELD ASSEMBLY ............................... 4 1 FIGURE 6: ELECTRONICS EQUIPMENT CENTER - INSTALLATION OF DRIP SHIELD DEFLECTORS .................................................. 4 9 FIGURE 7: INSULATION BLANKET REPLACEMENT .......................... 5 3
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 23, 2010 747-25A3581Revision 1: June 30, 2011 3 of 55 BOEING SERVICE BULLETIN 747-25A3581
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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 23, 2010 747-25A3581Revision 1: June 30, 2011 4 of 55 BOEING SERVICE BULLETIN 747-25A3581
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Commercial Airplanes 747 Service Bulletin ALERT Revision Transmittal SheetNumber: 747-25A3581Original Issue: September 23, 2010 Revision 1: June 30, 2011 ATA System: 2500 SUBJECT: EQUIPMENT/FURNISHINGS - Cargo and Accessory Compartments - M826 Cardfile Drip Shield Change This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION More work is necessary on the airplane(s) changed in accordance with the original issue of this service bulletin.
New deflector shield installation at STA 340 and insulation blanket replacement have been added. No airplane has incorporated the original issue of this service bulletin.
REASON FOR REVISION This revision is sent to make changes to the service bulletin to correct an interference issue found during parts mock-up for the 747-8.
These sections were changed:
1. Paragraph 2.C.1., Parts Necessary For Each Airplane, 015U1884-1 Top Kit added Deflector Shield, fasteners and insulation blanket.
2. Figure 1 - Added instructions to plug the unused holes at STA 340 and STA 400.
3. Figure 5 - Sequence of steps changed to make installation of parts easier.
4. Figure 6 - Added instructions to install new deflector shield at STA 340.
5. Figure 7 - Added new Figure 7 instructions to replace insulation blanket.
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.
The data given in Information Notice 747-25A3581 R00 IN01 is included in this revision.
REVISION HISTORY September 23, 2010Original Issue:
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Original Issue: September 23, 2010 747-25A3581Revision 1: June 30, 2011 5 of 55
June 30, 2011Revision 1:
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 23, 2010 747-25A3581Revision 1: June 30, 2011 6 of 55 BOEING SERVICE BULLETIN 747-25A3581
ALERTALERT
Commercial Airplanes 747 Service Bulletin ALERT SummaryNumber: 747-25A3581Original Issue: September 23, 2010 Revision 1: June 30, 2011 ATA System: 2500 SUBJECT: EQUIPMENT/FURNISHINGS - Cargo and Accessory Compartments - M826 Cardfile Drip Shield Change
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 Refer to Paragraph 1.B., Concurrent Requirements.
BACKGROUND This service bulletin will mitigate water from exiting over the edge of the existing drip shield and contaminating electrical components in the M826 cardfile below. If this service bulletin is not incorporated, electrical components in the M826 cardfile can malfunction due to water contamination which could result in an electrical short and potential loss of several functions essential for safe flight.
An Operator reported finding evidence of water damage to Diode Fire Card 285U0072-1 in the M826 Automatic Fire Overheat Logic Test System (AFOLTS) cardfile following a false FWD CARGO FIRE message which resulted in an Air Turn Back (ATB). Measurements showed the drip shield sloped away from the two drains added by SB 747-25A3370 (-400F) and SB 747-25A3526 (-400 Boeing Converted Freighter) and mandated by Airworthiness Directive (AD). Boeing's subsequent investigation found other reports of water damage to circuit cards in M826 affecting several operators.
This service bulletin replaces the existing drip shield with a new drip shield, installs two new drip shield deflectors between the new drip shield and the two adjacent bulkheads, and relocates wire bundles that interfere with these installations.
Boeing Service Related Problem (SRP) 747-SRP-25-0282 is related to this service bulletin.
ACTION (PRR 85901-100RS) Do the following items:
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Original Issue: September 23, 2010 747-25A3581Revision 1: June 30, 2011 7 of 55
1. Remove existing drip shield
2. Relocate wire bundles
3. Install new drip shield's brackets
4. Install new drip shield
5. Install new drip shield deflectors
6. Install new blankets
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 the change given in this service bulletin be done within 24 months after the revision 1 issue date of this service bulletin.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies may be available for airplanes in warranty as of October 8, 2008. Please refer to Paragraph 2.B., Industry Support Information.
MANPOWER Elapsed HoursTotal Task HoursAirplanes
14.7522.50GROUP 1
14.7522.50GROUP 2
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
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Original Issue: September 23, 2010 747-25A3581Revision 1: June 30, 2011 8 of 55 BOEING SERVICE BULLETIN 747-25A3581
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BOEING SERVICE BULLETIN 747-25A3581
ALERT ALERT -REMOVE EXISTING DRIP SHIELD -REMOVE EXISTING BLANKET -REMOVE EXISTING BRACKETS -RELOCATE EXISTING WIRE BUNDLES -INSTALL NEW BRACKETS -INSTALL NEW DRIP SHIELD -INSTALL NEW DRIP SHIELD DEFLECTORS -INSTALL NEW BLANKET STA 400 STA 380 STA 360 STA 340 1964805 Original Issue: September 23, 2010 Revision 1: June 30, 2011 747-25A3581
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 55
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 23, 2010 747-25A3581Revision 1: June 30, 2011 10 of 55 BOEING SERVICE BULLETIN 747-25A3581
ALERTALERT
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Commercial Airplanes 747 Service Bulletin ALERT Number: 747-25A3581 Original Issue: September 23, 2010 Revision 1: June 30, 2011 ATA System: 2500 SUBJECT: EQUIPMENT/FURNISHINGS - Cargo and Accessory Compartments - M826 Cardfile Drip Shield Change
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 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 85901-100RS for data about this change.
DESCRIPTIONCONFIGURATIONGROUP 747-400 that did not get hardware equivelent to SB 747-25A3526 during conversion to BCF configuration.
-1 747-400 that did get hardware equivelent to SB 747-25A3526 during conversion to BCF configuration.
-2 Airplane Models:
747-400 GroupVariable Number 2RM128 2RT021 - RT022 2RT031 - RT033
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GroupVariable Number 1RT071 - RT072 1RT075 2RT161 2RT164 1RT456 2RT461 1RT501 2RT506 1RT507 - RT510 1RT513 1RT516 1RT518 2RT519 1RT520 1RT524 2RT526 1RT528 2RT530 1RT572 - RT574 2RT575 - RT579 2RT642 1RT655 - RT657 1RT751 2RT752 1RT781 - RT782 2RT837 2RT967
2. Spares Affected Examine your spares supply for the parts or components identified in Paragraph 2.C., Parts Necessary for Each Airplane. If any parts or components are found, refer to Paragraph 2.C. for the recommended use.
B. Concurrent Requirements The service bulletin(s) listed below must be done before or at the same time as this service bulletin:
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Original Issue: September 23, 2010 747-25A3581Revision 1: June 30, 2011 12 of 55 BOEING SERVICE BULLETIN 747-25A3581