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Commercial ¡BOEINE: Group Airplane 747 Service Bulletin ALERT Number: 747-25A3526 Date: November 13, 2007 Revision 1: February 20, 2009 ATA System: 2551 2616 5311 SUBJECT: EQUIPMENT AND FURNISHINGS - Electrical/Electronic Equipment Centers - Dripshield Modification - Cardfile Nose Wheel Left Side Redesign - Main Equipment Center
BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2007 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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.
November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 1 of 41
BOEING SERVICE BULLETIN 747-25A3526
ALERT ALERT
BLANK PAGE
BLANK PAGE November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 2 of 41
BOEING SERVICE BULLETIN 747-25A3526
ALERT ALERT Table of Contents Revision Transmittal Sheet 5 Summary 7
PLANNING INFORMATION A. Effectivity .
1. Airplanes
2. Spares Affected B. Concurrent Requirements C. Reason D. Description 14 E. Compliance 14 F. Approval 14 G. Manpower 14 H. Weight and Balance Changes 15 Electrical Load Data 15 J. References.
1. Existing Data: 15
2. Data supplied with this Service Bulletin: 16
3. Installation Drawings Used in the Preparation of this Service Bulletin: 16 K. Publications Affected 16 L Interchangeability and Intermixability of Parts 16
2. MATERIAL INFORMATION. 17 A. Material - Price and Availability. 17 B. Industry Support Information. 17 C. Parts Necessary For Each Airplane 17
1. Kits/Parts: 17
2. Parts and Materials Supplied by the Operator: 19
3. Parts Modified and Reidentified: 19
4. Parts Removed and Not Replaced: 19 D. Parts Necessary to Change Spares 19 Special Tooling - Price and Availability. 19 F. Special Tooling Necessary to do this Service Bulletin 19
3. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION B. WORK INSTRUCTIONS.. 21 FIGURE 1: P402 PANEL REMOVAL . . . 23 FIGURE 2: SLOT SEAL, SPUDS AND RIGHT SIDE TUBE INSTALLATION. 26 FIGURE 3: LEFT SIDE TUBE INSTALLATION 31 FIGURE 4: P402 PANEL MOVE. . 38 Table of Contents November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for detaiis. 3 of 41
BOEING SERVICE BULLETIN 747-25A3526
ALERT ALERT
BLANK PAGE Table of Contents November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright @ Unpublished Work - See page 1 for details. 4 of 41
Commercial @ BOEINE® Airplanes 747 Service Bulletin ALERT Number: 747-25A3526 Revision Transmittal Sheet Original Issue: November 13, 2007 Revision 1: February 20, 2009 ATA System: 2551 2616 5311 SUBJECT: EQUIPMENT AND FURNISHINGS - Electrical/Electronic Equipment Centers - Dripshield Modification - Cardfile Nose Wheel Left Side Redesign - Main Equipment Center This Revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive 2008-08-25 is related to this service bulletin.
No more work is necessary on airplanes changed as shown in the original issue of this service bulletin.
Airplane RT524 was added to this service bulletin effectivity.
REASON FOR REVISION paragraph for changes. Paragraph 1.A., Effectivity, shows changes of airplane operators. Each operator should examine the Effectivity 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.
This revision is sent to change the spud orientation shown in views A and B, remove one clamp and change one clamp location in section B-B in Figure 2, correct the part orientation shown in section D-D in Figure 3 and to add Airworthiness Directive (AD) information These sections were changed:
1. In the summary, compliance Section, added Airworthiness Directive (AD) statement.
2. In the summary, changed illustration to agree with clamps changed in Figure 2.
3. In Paragraph 1.E., Compliance, added AD statement.
4. In Paragraph 1.F., Approval, added AD statement.
Original Issue: November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 5 of 41
BOEING SERVICE BULLETIN 747-25A3526
ALERT ALERT
5. In paragraph 1.J., References, added AD statement.
6. In Figure 2, changed the spud orientation in views A and B, removed one clamp and changed one clamp location in section B-B.
7. In Figure 3, section D-D, change the notation for the view orientation.
REVISION HISTORY Original Issue: November 13, 2007 Revision 1: February 20, 2009 Original Issue: November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 6 of 41
Commercial A BOEING® Airplanes 747 Service Bulletin ALERT Number: Original Issue: November 13, 2007 747-25A3526 Summary Revision 1: February 20, 2009 ATA System: 2551 2616 5311 SUBJECT: EQUIPMENT AND FURNISHINGS - Electrical/Electronic Equipment Centers - Dripshield Modification - Cardfile Nose Wheel Left Side Redesign - Main Equipment Center
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 Accomplishment of this service bulletin will prevent water from entering the M826 card file and damaging a circuit card. Failure of one or more of the 15 fuel system circuit cards in the card file could cause loss of fuel management, which could cause unavailability of fuel. Failure of one or more of the 35 fire detection circuit cards could cause a false message of a fire, or no message of a fire when there is a fire.
An operator of a 747-400F airplane experienced an Air Turn Back due to AFT CARGO FIRE MSG illuminated Ground check noted that there were no signs of an actual fire. Investigation found water seeping through cracks in the main deck cargo floor sealant and loose floor board fasteners. The water was dripping onto and around the dripshield located over the Station 400 Card file. Due to the amount of water, the dripshield was not able to prevent water from entering the card file. The water in the Card file damaged the A32 (AFOLTS Aft Cargo Fire) card. A further examination of the dripshield revealed that the drain slot was open to allow the water to drain as designed.
The operator found that water in the dripshield over flowed during taxi and takeoff and fell on the card file. The dripshield has only one drain hole in the aft corner. When the airplane is parked in the normal attitude, water will not drain and up to 1.4 gallons of water can accumulate in the dripshield. The pooled water can later overflow the dripshield during taxi and takeoff and fall below to the M826 Card file, which could cause failure of essential The same condition exists on the 747-400 Special Freighter (SF) airplanes. This service bulletin provides instructions to move the P402 panel for access and to install two drains and drain tubes to eliminate the water accumulation on 747-400SF airplanes.
Original Issue: November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 41
BOEING SERVICE BULLETIN 747-25A3526
ALERT ALERT Boeing Service Related Problem 747-SRP-25-0269 is related to this service bulletin.
ACTION (2550MK4109) Change dripshield:
1. Seal drainage slot.
2. Install two drains.
3. Install two drain tubes.
4. Move the P402 panel.
EFFECTIVITY 747-400 airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
COMPLIANCE | Federal Aviation Administration (FAA) Airworthiness Directive 2008-08-25 is related to this service bulletin.
Boeing recommends operators incorporate this service bulletin within 24 months after date of the original release of this service bulletin.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the configuration changes given in this service bulletin.
MANPOWER Total Task Hours Elapsed Hours
8.0 8.0
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
Original Issue: November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 8 of 41
BOEING SERVICE BULLETIN 747-25A3526
ALERT ALERT
SEAL SLOT STA 400 STA 400
BULKHEAD
ENDED STA
INSTALL
DRAINS AND
DRAIN TUBES MOVE P402 PANEL
FWD INSTALL DRAINS AND DRAIN TUBES 1443199 Original Issue: November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright @ Unpublished Work - See page 1 for details 9 of 41
BOEING SERVICE BULLETIN 747-25A3526
ALERT ALERT
BLANK PAGE Original Issue: November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 10 of 41
Commercial ABDEING® Airplanes 747 Service Bulletin ALERT Number: 747-25A3526 Original Issue: November 13, 2007 Revision 1: February 20, 2009 ATA System: 2551 2616 5311 SUBJECT: EQUIPMENT AND FURNISHINGS - Electrical/Electronic Equipment Centers - Dripshield Modification - Cardfile Nose Wheel Left Side Redesign - Main Equipment Center
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,
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. Refer to MC 2550MK4109 for data about this change.
GROUP CONFIGURATION DESCRIPTION 747-400 airplanes Airplane models:
747-400
IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER
AIR ATLANTA ICELANDIC (AID) 1 RT751
AIR FRANCE (AFA) 1 RT071-RT072 RT075 Original Issue: November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 11 of 41
BOEING SERVICE BULLETIN 747-25A3526
ALERT ALERT
CATHAY PACIFIC AIRWAYS (CAT) 1 RT456 RT508 RT518 RT528 RT781-RT782
DRAGONAIR (DRG) 1 RT510 RT513 RT516 RT524
GREAT WALL AIRLINES (GWL) 1 RT520
JAL INTERNATIONAL (JAL) 1 RT655-RT657
KOREAN AIR (KAL) 1 RT572-RT574
MARTINAIR HOLLAND (MTH) 1 RT501 RT507 RT509
IDENTIFICATION BY VARIABLE NUMBER Variable Group RT071-RT072 1 RT075 1 RT456 1 RT501 1 RT507-RT510 1 RT513 1 RT516 1 RT518 1 RT520 1 RT524 1 RT528 1 RT572-RT574 1 RT655-RT657 1 RT751 1 RT781-RT782 1
2. Spares Affected None.
B. Concurrent Requirements None.
Original Issue: November 13, 2007 Revision 1: February 20, 2009 747-25A3526 BOEING PROPRIETARY - Copyright @ Unpublished Work - See page 1 for details 12 of 41 ,