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Commercial Airplanes MD90 Service Bulletin ALERT Number: MD90-57A026 Original Issue: February 11, 2010 Revision 1: February 23, 2011 ATA System: 5710 SUBJECT: WINGS - Main Frame - Inspect/Repair Upper and Lower Rear Spar Caps at Station Xrs=164.000 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.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: February 11, 2010 MD90-57A026Revision 1: February 23, 2011 1 of 59
3.0
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 11, 2010 MD90-57A026Revision 1: February 23, 2011 2 of 59 BOEING SERVICE BULLETIN MD90-57A026
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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 3 B. Concurrent Requirements ...................................... 1 3 C. Reason ................................................ 1 3 D. Description .............................................. 1 3 E. Compliance .............................................. 1 6 F. Approval ............................................... 2 0 G. Manpower .............................................. 2 0 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 2
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 6 C. Parts Necessary For Each Airplane ................................. 2 6
1. Kits/Parts: ........................................... 2 6
2. Parts and Materials Supplied by the Operator: ........................ 4 3
3. Parts Modified and Reidentified: ............................... 4 3
4. Parts Removed and Not Replaced: .............................. 4 3 D. Parts Necessary to Change Spares ................................. 4 3 E. Special Tooling - Price and Availability ............................... 4 3 F. Special Tooling Necessary to do this Service Bulletin ....................... 4 4
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 4 5 A. GENERAL INFORMATION ..................................... 4 5 B. WORK INSTRUCTIONS ....................................... 4 6 FIGURE 1: WING REAR SPAR LOWER CAP - LEFT AND RIGHT - EDDY CURRENT TESTING HIGH FREQUENCY INSPECTION .................................. 5 8
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Commercial Airplanes MD90 Service Bulletin ALERT Revision Transmittal SheetNumber: MD90-57A026Original Issue: February 11, 2010 Revision 1: February 23, 2011 ATA System: 5710 SUBJECT: WINGS - Main Frame - Inspect/Repair Upper and Lower Rear Spar Caps at Station Xrs=164.000 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, however the repetitive inspections called for in the original issue are still required.
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
REASON FOR REVISION This revision is sent to incorporate engineering released subsequent to original release of this service bulletin, which incorporates an option to do a splice repair of the upper and/or lower rear spar caps.
The data given in Information Notice MD90-57A026 IN 01 is included in this revision.
These sections were changed:
1. In Paragraph 1.C., Reason, added spar splice option.
2. In Paragraph 1.D., Description, added Condition titles, Option 1 heading and Option 2 splice repair, and added repair options for Condition 3.
3. In Paragraph 1.E., Compliance, added Option 1 heading, Option 2 splice repair, and repair options for Condition 3.
4. In Paragraph 1.F., Approval, added approval statement for Principle Structural Element (PSE) inspection requirements.
5. In Paragraph 1.G., Manpower, added a table for splice repair hours.
6. In Paragraph 1.J.1., Existing Data, changed Aircraft Maintenance Manual (AMM) references to reflect correct chapter references.
7. In Paragraph 1.J.2., Data supplied with this Service Bulletin, added drawings and updated DCN/REV column.
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8. In Paragraph 2.A., Material - Price and Availability, added Service Kits, Reorder Lead Time (ROLT), and unit price.
9. In Paragraph 2.C.2., Parts and Materials Supplied by the Operator, changed supplier address.
10. In Paragraph 2.C.1., Kits/Parts, changed Service Kit applicability table to add new kits and added new kit parts list.
11. In Paragraph 2.C.3., Parts Modified and Reidentified, added parts changed based on repair configuration.
12. In Paragraph 3.A., General Information, removed one Note and renumbered remaining Notes.
13. In Paragraph 3.B., Work Instructions, added Option 1 heading, Option 2 splice repair, and repair options for Condition 3, changed work step order, and corrected Aircraft Maintenance Manual Chapter references.
14. Changed Figure 1 and Note for clarity of work required.
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 February 11, 2010Original Issue:
February 23, 2011Revision 1:
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Commercial Airplanes MD90 Service Bulletin ALERT SummaryNumber: MD90-57A026Original Issue: February 11, 2010 Revision 1: February 23, 2011 ATA System: 5710 SUBJECT: WINGS - Main Frame - Inspect/Repair Upper and Lower Rear Spar Caps at Station Xrs=164.000
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 Two MD-80 operators, while doing an investigation for fuel leaks, reported five instances of cracking of the wing rear spar lower cap at the outboard flap, inboard drive hinge at station Xrs=164.000. Boeing has determined that cracks are the result of material fatigue from normal flap operating loads. No MD-90 failures have yet been reported but this is a fatigue issue and it was determined that MD-90s are also susceptible to cracking. Inspecting this area for cracks will stop any crack migration and ensure repairs are done before additional damage occurs.
Installation of doublers or doing the spar cap splice will provide a permanent repair. If not corrected, fuel leaks and damage to the wing skin or other structure may occur, resulting in flight disruptions and possible loss of the structural integrity of the wing.
ACTION Refer to Paragraph 1.D., for Description.
EFFECTIVITY MD-90-30 Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
COMPLIANCE Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection and/or repair procedures given in this service bulletin.
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MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
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BOEING SERVICE BULLETIN MD90-57A026
ALERT ALERT
INSPECT / REPAIR UPPER AND LOWER REAR SPAR CAPS AT STATION Xrs=164.000 1901591 Original Issue: February 11, 2010 Revision 1: February 23, 2011 MD90-57A026
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 59
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 11, 2010 MD90-57A026Revision 1: February 23, 2011 10 of 59 BOEING SERVICE BULLETIN MD90-57A026
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Commercial Airplanes MD90 Service Bulletin ALERT Number: MD90-57A026 Original Issue: February 11, 2010 Revision 1: February 23, 2011 ATA System: 5710 SUBJECT: WINGS - Main Frame - Inspect/Repair Upper and Lower Rear Spar Caps at Station Xrs=164.000
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 airplanes shown below.
DESCRIPTIONCONFIGURATIONGROUP MD-90 Airplanes with a Multi-component Bulkhead at Wing Station Xrs=137.750 -1 MD-90 Airplanes with a Machined Bulkhead at Wing Station Xrs=137.750 -2 Airplane Models:
MD-90-30 GroupFuselage Number 12094 - 2100 12115 12117 12120 12122 - 2123
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GroupFuselage Number 12125 - 2126 12129 12131 12133 12136 12138 12140 - 2144 12146 - 2147 12149 - 2150 12153 - 2154 12156 - 2159 12161 - 2166 12169 - 2171 12173 12175 12177 12179 12181 12184 12186 12190 - 2191 12193 - 2195 12197 - 2198 12200 12202 - 2203 12205 12207 12209 - 2213 22215 - 2217 22219 - 2233 22235 - 2238 22240
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