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Commercial Airplanes MD11 Service Bulletin Number: MD11-28-132 Original Issue: November 25, 2008 Revision 1: July 06, 2010 ATA System: 2800 SUBJECT: FUEL - Fuel - Install Fuel Tank Float Level Switch In-line Fuses 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2008 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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.
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2.0
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BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 1 0 B. Concurrent Requirements ...................................... 1 0 C. Reason ................................................ 1 0 D. Description .............................................. 1 0 E. Compliance .............................................. 1 1 F. Approval ............................................... 1 1 G. Manpower .............................................. 1 2 H. Weight and Balance Changes .................................... 1 3 I. Electrical Load Data ......................................... 1 3 J. References .............................................. 1 3
1. Existing Data: ......................................... 1 3
2. Data supplied with this Service Bulletin: ........................... 1 3
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 1 3
4. Process Data: ......................................... 1 3 K. Publications Affected ........................................ 1 3 L. Interchangeability and Intermixability of Parts ........................... 1 4
2. MATERIAL INFORMATION ........................................ 1 5 A. Material - Price and Availability ................................... 1 5 B. Industry Support Information .................................... 1 5 C. Parts Necessary For Each Airplane ................................. 1 5
1. Kits/Parts: ........................................... 1 5
2. Parts and Materials Supplied by the Operator: ........................ 2 2
3. Parts Modified and Reidentified: ............................... 2 2
4. Parts Removed and Not Replaced: .............................. 2 3 D. Parts Necessary to Change Spares ................................. 2 3 E. Special Tooling - Price and Availability ............................... 2 3 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 3
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 5 A. GENERAL INFORMATION ..................................... 2 5 B. WORK INSTRUCTIONS ....................................... 2 6 Appendix A: FUEL TANK 1 [Group 1-4] ................................... 3 0 Appendix B: FUEL TANK 2 [Group 1-4] ................................... 3 1 Appendix C: FUEL TANK 3 [Group 1-4] ................................... 3 2 Appendix D: UPPER AND LOWER AUXILIARY FUEL TANKS [Group 1-4] ................ 3 3 Appendix E: TAIL FUEL TANK [Group 1-4] ................................. 3 4 Appendix F: FORWARD AUXILIARY FUEL TANK [Group 2] ....................... 3 5 Appendix G: FORWARD AUXILIARY FUEL TANK [Group 3] ....................... 3 6 Appendix H: FORWARD AUXILIARY FUEL TANK NO. 1 STATION 1044.437 AND NO. 2 STATION 1124.437 [Group 4] ............................................ 3 7 Appendix I: FUEL TESTS [Group 1] .................................... 3 8
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Appendix J: FUEL TESTS [Group 2] .................................... 4 0 Appendix K: FUEL TESTS [Group 3] .................................... 4 2 Appendix L: FUEL TESTS [Group 4] .................................... 4 4
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Commercial Airplanes MD11 Service Bulletin Revision Transmittal SheetNumber: MD11-28-132Original Issue: November 25, 2008 Revision 1: July 06, 2010 ATA System: 2800 SUBJECT: FUEL - Fuel - Install Fuel Tank Float Level Switch In-line Fuses This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION No more work is necessary on the airplane(s) changed in accordance with the original issue of this service bulletin.
Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2010-NM-003-AD, is related to this service bulletin.
Airplane fuselage number 0608 was moved to Group 1 from Group 3 of this service bulletin effectivity.
REASON FOR REVISION This revision is sent to incorporate changes outlined in Information Notices (IN)s MD11-28-132 IN 01, IN 02 and IN 03.
The data given in Information Notices (IN)s MD11-28-132 IN 01, IN 02 and IN 03, is included in this revision.
These sections were changed:
1. In Paragraph 1.D., Description, added Maintenance Zone table.
2. In Paragraph 1.E., Compliance, added Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2010-NM-003-AD and changed recommended compliance statement.
3. In Paragraph 1.F., Approval, changed statement.
4. In Paragraph 1.J.1., Existing Data, added Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2010-NM-003-AD.
5. In Paragraph 1.H., Weight and Balance Changes, changed values.
6. In Paragraph 1.K.1., Publications, changed Aircraft Maintenance Manual and Fault Isolation Manual chapter-section.
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7. In Paragraph 1.K.2., Damage Tolerance Based Structural Inspections, added statement.
8. In Paragraph 2.A., Material - Price and Availability, changed pricing data.
9. In Paragraph 2.C.1., Kit/Parts, changed wire kit number for Groups 1 through 4, Group 3 top kit number and AEPL drawing number.
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 November 25, 2008Original Issue:
July 06, 2010Revision 1:
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Commercial Airplanes MD11 Service Bulletin SummaryNumber: MD11-28-132Original Issue: November 25, 2008 Revision 1: July 06, 2010 ATA System: 2800 SUBJECT: FUEL - Fuel - Install Fuel Tank Float Level Switch In-line Fuses
CONCURRENT REQUIREMENTS None.
BACKGROUND An investigation by Boeing has determined that float level switch wires located on the left and right wing forward spar, right main landing gear wheel well, horizontal stabilizer front spar, empennage, and forward cargo compartment are routed in the same bundles as power wires. If a short circuit between a float level switch wire and a power wire occurs, an over current can cause excessive temperatures in the float level switch wires, resulting in damage. Adding an in-line fuse as a self-contained component in each float level switch circuit and sleeving the wires between the fuel tank and the in-line fuse will minimize the possibility of excessive temperatures in the float level switch wires. If not corrected, and there is a short circuit of the float level switch wire to a power wire, possible damage to the float level switch wire could occur, and become a potential ignition source for the fuel tank.
This service bulletin is the result of the safety assessments conducted by Boeing under a Special Federal Aviation Regulation (SFAR) 88, Fuel Tank System Fault Tolerance Evaluation Requirements.
ACTION This service bulletin installs fuel tank float level switch in-line fuses.
EFFECTIVITY All MD-11 and MD-11F Airplanes. Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2010-NM-003-AD, is related to this service bulletin.
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 operators do this service bulletin within 5 years after the original issue date on this service bulletin.
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INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the configuration changes given in this service bulletin.
MANPOWER Refer to Paragraph 1.G, for Manpower information.
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
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Commercial Airplanes MD11 Service Bulletin Number: MD11-28-132 Original Issue: November 25, 2008 Revision 1: July 06, 2010 ATA System: 2800 SUBJECT: FUEL - Fuel - Install Fuel Tank Float Level Switch In-line Fuses
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This service bulletin is for the airplanes shown below.
NOTE: When any Group 3 or 4 passenger airplane shown below is modified to a freighter configuration by Boeing Passenger to Freighter (P to F) engineering, it will become a Group 1 airplane.
DESCRIPTIONCONFIGURATIONGROUP Applicable to airplanes with fuel tanks 1, 2, 3, upper and lower auxiliary, and tail configuration.
-1 Applicable to airplanes with fuel tanks 1, 2, 3, upper and lower auxiliary, foward auxiliary, tail, and unique wiring configuration.
-2 Applicable to airplanes with fuel tanks 1, 2, 3, upper and lower auxiliary, foward auxiliary, tail, and unique wiring configuration.
-3 Applicable to airplanes with fuel tanks 1, 2, 3, upper and lower auxiliary, foward auxiliary No. 1, foward auxiliary No. 2, and tail configuration.
-4 Airplane Models:
MD-11, MD-11F GroupFuselage Number 1447 - 449 1451 - 464 1466 - 489
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GroupFuselage Number 1491 - 517 1519 - 531 4532 1533 - 543 4544 1545 - 552 1554 - 589 2590 1591 - 596 3597 1598 - 646
2. Spares Affected None.
B. Concurrent Requirements None.
C. Reason An investigation by Boeing has determined that float level switch wires located on the left and right wing forward spar, right main landing gear wheel well, horizontal stabilizer front spar, empennage, and forward cargo compartment are routed in the same bundles as power wires. If a short circuit between a float level switch wire and a power wire occurs, an over current can cause excessive temperatures in the float level switch wires, resulting in damage. Adding an in-line fuse as a self-contained component in each float level switch circuit and sleeving the wires between the fuel tank and the in-line fuse will minimize the possibility of excessive temperatures in the float level switch wires. If not corrected, and there is a short circuit of the float level switch wire to a power wire, possible damage to the float level switch wire could occur, and become a potential ignition source for the fuel tank.
This service bulletin is the result of the safety assessments conducted by Boeing under a Special Federal Aviation Regulation (SFAR) 88, Fuel Tank System Fault Tolerance Evaluation Requirements.
Revision 1 is sent to incorporate changes outlined in Information Notices (IN)s MD11-28-132 IN 01, IN 02 and IN 03.
The data given in Information Notices (IN)s MD11-28-132 IN 01, IN 02 and IN 03, is included in this revision.
D. Description This service bulletin installs fuel tank float level switch in-line fuses.
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Revision 1 - No more work is necessary on the airplane(s) changed in accordance with the original issue of this service bulletin.
The work in this service bulletin is done in the maintenance zone(s) given below.
Group 1:
Affected Maintenance Zones ZoneModel 144, 145, 146, 371, 516, 518, 525, 526, 527, 618, 625, 626, 627 MD-11, MD-11F Group 2-4:
Affected Maintenance Zones ZoneModel 123, 144, 145, 146, 254, 371, 516, 518, 525, 526, 527, 618, 625, 626, 627 MD-11 E. Compliance Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2010-NM-003-AD, is related to this service bulletin.
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 operators do this service bulletin within 5 years after the original issue date on this service bulletin.
F. Approval This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other approved Boeing changes.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin.
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G. Manpower The table below shows an estimate of the task hours necessary to do this modification for each airplane.
This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator task hour data if necessary. The estimate does not include lost time. These are some examples of lost time:
— Time to adjust to the workplace — Time to schedule the work — Time to examine the work — Time to cure the materials — Time to make the parts — Time to find the tools.
Group 1:
Elapsed HoursTask HoursNumber of PersonsTask
10.521.02Open Access
62.5125.02Change
3.06.02Test
12.525.02Close Access
88.5177.0TOTAL FOR EACH AIRPLANE Group 2-3:
Elapsed HoursTask HoursNumber of PersonsTask
10.521.02Open Access
66.0132.02Change
3.16.22Test
12.525.02Close Access
92.1184.2TOTAL FOR EACH AIRPLANE Group 4:
Elapsed HoursTask HoursNumber of PersonsTask
10.521.02Open Access
67.6135.21Change
3.36.62Test
12.525.02Close Access
93.9187.8TOTAL FOR EACH AIRPLANE
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