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Commercial Airplanes 737 Service Bulletin Number: 737-57A1277 Original Issue: July 25, 2002 Revision 3: May 16, 2012 ATA System: 5752 SUBJECT: WINGS - Trailing Edge Flaps - Outboard Flap Carriage Spindle - Inspection for Cracking 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2002 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.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: July 25, 2002 737-57A1277Revision 3: May 16, 2012 1 of 50
4.0
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 25, 2002 737-57A1277Revision 3: May 16, 2012 2 of 50 BOEING SERVICE BULLETIN 737-57A1277
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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 ........................................ 2 2 B. Concurrent Requirements ...................................... 2 2 C. Reason ................................................ 2 2 D. Description .............................................. 2 3 E. Compliance .............................................. 2 4 F. Approval ............................................... 2 6 G. Manpower .............................................. 2 6 H. Weight and Balance Changes .................................... 2 7 I. Electrical Load Data ......................................... 2 7 J. References .............................................. 2 7
1. Existing Data: ......................................... 2 7
2. Data supplied with this Service Bulletin: ........................... 2 7
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 8 K. Publications Affected ........................................ 2 8 L. Interchangeability and Intermixability of Parts ........................... 2 8
2. MATERIAL INFORMATION ........................................ 2 9 A. Material - Price and Availability ................................... 2 9 B. Industry Support Information .................................... 2 9 C. Parts Necessary For Each Airplane ................................. 2 9
1. Kits/Parts: ........................................... 2 9
2. Parts and Materials Supplied by the Operator: ........................ 2 9
3. Parts Modified and Reidentified: ............................... 2 9
4. Parts Removed and Not Replaced: .............................. 2 9 D. Parts Necessary to Change Spares ................................. 2 9 E. Special Tooling - Price and Availability ............................... 2 9 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 9
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 3 1 A. GENERAL INFORMATION ..................................... 3 1 B. WORK INSTRUCTIONS ....................................... 3 2 FIGURE 1: CARRIAGE SPINDLE INSPECTION ............................. 3 6 FIGURE 2: INBOARD CARRIAGE / MIDFLAP GAP CHECK - CLAY METHOD ............. 3 8 FIGURE 3: OUTBOARD CARRIAGE / MIDFLAP GAP CHECK - CLAY METHOD ........... 4 0 FIGURE 4: INBOARD CARRIAGE / MIDFLAP GAP CHECK - MEASUREMENT METHOD ...... 4 3 FIGURE 5: OUTBOARD CARRIAGE / MIDFLAP GAP CHECK - MEASUREMENT METHOD ..... 4 5 FIGURE 6: MIDFLAP LEADING EDGE RELATIVE MOVEMENT CHECK ................ 4 8
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 25, 2002 737-57A1277Revision 3: May 16, 2012 3 of 50 BOEING SERVICE BULLETIN 737-57A1277
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 25, 2002 737-57A1277Revision 3: May 16, 2012 4 of 50 BOEING SERVICE BULLETIN 737-57A1277
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Commercial Airplanes 737 Service Bulletin Revision Transmittal SheetNumber: 737-57A1277Original Issue: July 25, 2002 Revision 3: May 16, 2012 ATA System: 5752 SUBJECT: WINGS - Trailing Edge Flaps - Outboard Flap Carriage Spindle - Inspection for Cracking This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive AD 2010-15-08 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.
No more work is necessary on the airplane(s) changed in accordance with Revision 2 of this service bulletin.
REASON FOR REVISION This revision is sent to provide information for compliance table 1 that was in revision R1 but was inadvertantly deleted in revision R2.
These sections were changed:
1. Section 1.E. Compliance, Table 1 - re-inserted "Work Package 1 (NDT): Not Required"
2. Section 1.F. Approval, changed revision 2 to revision 3.
3. Section 3.A. General Information, deleted note 1. "The sequence of steps ... can be changed".
The data given in Information Notice 737-57A1277 IN 03 is included in this revision.
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 July 25, 2002Original Issue:
November 25, 2003Revision 1:
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 25, 2002 737-57A1277Revision 3: May 16, 2012 5 of 50
June 09, 2011Revision 2:
May 16, 2012Revision 3:
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Original Issue: July 25, 2002 737-57A1277Revision 3: May 16, 2012 6 of 50 BOEING SERVICE BULLETIN 737-57A1277
Commercial Airplanes 737 Service Bulletin SummaryNumber: 737-57A1277Original Issue: July 25, 2002 Revision 3: May 16, 2012 ATA System: 5752 SUBJECT: WINGS - Trailing Edge Flaps - Outboard Flap Carriage Spindle - Inspection for Cracking
CONCURRENT REQUIREMENTS None
BACKGROUND This service bulletin provides instructions for the inspection of the outboard midflap carriage spindles and will ensure that the carriage spindles are not fractured.
42 severed outboard midflap carriage spindles (resulting from corrosion, fatigue and/or improper overhaul) have been reported by 23 operators. The most critical section for a fracture is at the forward end of the spindle through the large diameter. Of the 42 reported fractures, 24 have been thru the critical "A" location and 18 reported at the "B" spindle location . The fractures occurred on 737-200/-300/-400/-500 airplanes.
If one carriage spindle fractures in the forward end of the spindle (the critical section), the pilot can compensate for it with inputs to the aileron and/or rudder. However, if both the inboard and outboard spindles fracture in the critical section on an outboard flap, continued safe flight and landing of the airplane may be precluded.
Boeing received a recent report about a 737-200 having both inboard and outboard spindles (number 7 & 8 carriage spindles) severed on the right outboard flap during landing. The flight crew reported a loud bang at approximately 500 feet AGL followed by the airplane rolling off hard to the right. Corrective action was required to maintain level flight. As a result, a gap check was developed to detect severed spindles only at the critical "A" location. Whereas, the NDT inspection, in the previous issue of this service bulletin, checks the critical "A" location thru the "B" location up to the cross bolt for the spherical bearing.
ACTION Extend the flaps. For the left and right midflaps, do an NDT inspection or Gap Check of the spindle at each carriage (two carriages per midflap) at the specified time. The NDT inspection or Gap Check will detect a fracture in the spindle. If the spindle is fractured or severed, remove it from service, discard it, and notify Boeing. Then, install a new or serviceable carriage spindle. If you notice corrosion at the exposed portion of the spindle, remove the carriage and overhaul the spindle.
EFFECTIVITY All 737-100, -200, -200C, -300, -400, and -500 airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directive AD 2010-15-08 is related to this service bulletin.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 25, 2002 737-57A1277Revision 3: May 16, 2012 7 of 50
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.
See Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection given in this service bulletin.
MANPOWER Elapsed HoursTotal Task HoursWork Package 8161 122
MATERIAL INFORMATION None
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 25, 2002 737-57A1277Revision 3: May 16, 2012 8 of 50 BOEING SERVICE BULLETIN 737-57A1277
BOEING SERVICE BULLETIN 737-57A1277
SEE IT IS NOT NECESSARY TO
REMOVE THE COVER PLATE
DO AN NDT INSPECTION
AND GAP CHECK OF THE
CARRIAGE SPINDLE
SPINDLE BEARING
BEARING SUPPORT
SEE TRAILING
EDGE FLAP
OUTBOARD MIDFLAP
CARRIAGE V86821 Original Issue: July 25, 2002 Revision 3: May 16, 2012 737-57A1277
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 50
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 25, 2002 737-57A1277Revision 3: May 16, 2012 10 of 50 BOEING SERVICE BULLETIN 737-57A1277
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Commercial Airplanes 737 Service Bulletin Number: 737-57A1277 Original Issue: July 25, 2002 Revision 3: May 16, 2012 ATA System: 5752 SUBJECT: WINGS - Trailing Edge Flaps - Outboard Flap Carriage Spindle - Inspection for Cracking
1. PLANNING INFORMATION A. Effectivity
1. Airplanes Refer to Service Bulletin Index Document D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is for the airplanes shown below.
DESCRIPTIONCONFIGURATIONGROUP 737-100, -200, -200C, -300, -400 and -500 airplanes-1 Airplane Models:
737-100, 737-200, 737-200C, 737-300, 737-400, 737-500 GroupVariable Number 1PA001 - PA022 1PA099 1PA231 - PA232 1PC001 - PC005 1PG001 - PG075 1PG199 1PG201 - PG230 1PG251 - PG255 1PG271 - PG279 1PG301 - PG314 1PG331 - PG332
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GroupVariable Number 1PG351 - PG356 1PG375 1PG401 - PG403 1PG431 - PG442 1PG471 - PG475 1PG501 - PG505 1PG571 - PG586 1PG621 - PG630 1PG651 - PG652 1PG701 - PG705 1PH001 1PH011 - PH013 1PH021 - PH024 1PH701 - PH715 1PH731 - PH732 1PH741 - PH743 1PJ001 - PJ009 1PJ031 - PJ032 1PJ071 - PJ072 1PJ101 - PJ119 1PJ201 - PJ219 1PJ301 - PJ302 1PJ551 - PJ561 1PJ601 - PJ615 1PJ811 1PJ816 - PJ817 1PK026 - PK029 1PK041 - PK053 1PK061 - PK070 1PK081 - PK082 1PK091 - PK099 1PK101 - PK103 1PK111 - PK120
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Original Issue: July 25, 2002 737-57A1277Revision 3: May 16, 2012 12 of 50 BOEING SERVICE BULLETIN 737-57A1277