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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-57A1335 Original Issue: May 24, 2017 ATA System: 5730 SUBJECT: WINGS - Plates/Skin - Upper Aft Skin at and Forward of the Rear Spar from Wing Buttock Line 159 to 220 - Inspection Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). 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 © 2017 Boeing.
Unpublished Work. All Rights Reserved.
Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company.
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, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and Boeing liveries 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.
Original Issue: May 24, 2017 737-57A1335 1 of 37
2.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 24, 2017 737-57A1335 2 of 37 BOEING SERVICE BULLETIN 737-57A1335
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Table of Contents
S u m m a r y5
1. PLANNING INFORMATION9
A . E f f e c t i v i t y9
1. Airplanes9
2 . S p a r e s A f f e c t e d ........................................ 2 1 B. Concurrent Requirements ...................................... 2 1 C. Reason ................................................ 2 1 D. Description .............................................. 2 1 E. Compliance .............................................. 2 2 F . A p p r o v a l ............................................... 2 4 G. Manpower .............................................. 2 4 H. Weight and Balance Changes .................................... 2 4 I. Electrical Load Data ......................................... 2 4 J . R e f e r e n c e s .............................................. 2 4
1. Existing Data: ......................................... 2 4
2. Data Supplied with this Service Bulletin: ........................... 2 5
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 5 K. Publications Affected ........................................ 2 5 L. Interchangeability and Intermixability of Parts ........................... 2 6 M. Software Accomplishment Summary ................................ 2 6
2. MATERIAL INFORMATION ........................................ 2 7 A. Material - Price and Availability ................................... 2 7 B. Industry Support Information .................................... 2 7 C. Parts Necessary for Each Airplane ................................. 2 7 1 . K i t s / P a r t s ............................................ 2 7
2. Parts and Materials Supplied by the Operator ........................ 2 7
3. Parts Modified and Reidentified ................................ 2 7
4. Parts Removed and Not Replaced .............................. 2 7 D. Parts Necessary to Change Spares ................................. 2 7 E. Special Tooling - Price and Availability ............................... 2 7 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 7
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 9 A. GENERAL INFORMATION ..................................... 2 9 B. WORK INSTRUCTIONS ....................................... 3 0 FIGURE 1: LEFT WING - DETAILED INSPECTION OF THE UPPER AFT SKIN FROM WBL 159 TO WBL 2 2 0............................................... 3 2 FIGURE 2: RIGHT WING - DETAILED INSPECTION OF THE UPPER AFT SKIN FROM WBL 159 TO WBL 2 2 0............................................... 3 4 APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 1: DETAILED INSPECTION
OF THE UPPER AFT SKIN ON THE LEFT OR RIGHT WING FROM WING BUTTOCK LINE (WBL) 159 TO WBL 220 .................................... 3 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 24, 2017 737-57A1335 3 of 37 BOEING SERVICE BULLETIN 737-57A1335
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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-57A1335Original Issue: May 24, 2017 ATA System: 5730 SUBJECT: WINGS - Plates/Skin - Upper Aft Skin at and Forward of the Rear Spar from Wing Buttock Line 159 to 220 - Inspection
THIS DOCUMENT 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 DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER.
CONCURRENT REQUIREMENTS None.
BACKGROUND Accomplishment of this service bulletin will make sure that cracks are found in the upper aft skin (inspar upper skin) of the left and right wing at and forward of the rear spar from Wing Buttock Line (WBL) 159 to WBL 220.
If this service bulletin is not done, undetected cracks in the upper aft skin can lead to the inability of a principal structural element to sustain flight load which could adversely affect the structural integrity of the airplane.
While performing inspections in accordance with SB 737-57-1318, one operator reported two crack indications in the right wing upper aft skin originating from fastener holes common to the rear spar upper chord at WBL
172.30 and WBL 197.38. The cracks were found on airplanes with 58,148 flight hours and 45,512 flight cycles to 64,204 flight hours and 51,409 flight cycles. Stresses are locally influenced by the bend in the rear spar causing higher cyclic fatigue stresses.
This service bulletin provides instructions to inspect the upper aft skin and forward of the rear spar for any crack from WBL 159 to WBL 220 and make sure any crack is found and repaired before it reaches a critical length.
Boeing Fleet Team Digest (FTD) 737 FTD 57-16003 is related to this service bulletin.
Boeing Service Related Problem (SRP) 737-SRP-57-0305 is related to this service bulletin.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected Paragraph 1.E., Compliance and Paragraph
1.F., Approval YesAD Related Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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ReferenceAffectedPlanning Data Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedNoPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator NoOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION Group 1:
Boeing endorses the FAA rules related to Limit of Validity (LOV) and recommends immediate and permanent removal from service of any airplanes upon reaching the LOV, whether or not it is operated under FAA jurisdiction.
As such, Boeing no longer provides maintenance instructions for airplanes that have accumulated flight cycles beyond the LOV. 737 Classic airplanes line numbers 1-291 have accumulated flight cycles beyond the LOV of the maintenance program. 14 CFR 121.1115 and 129.115 prohibit operation of an airplane beyond its LOV.
Group 2:
Deactivate the trailing edge flap system. Do a detailed inspection for any crack in the upper aft skin from WBL 159 to WBL 220. If any crack is found, contact The Boeing Company for repair instructions and do the repair.
Repeat the detailed inspection in the unrepaired areas. If no crack is found, repeat the detailed inspection.
Activate the trailing edge flap system.
EFFECTIVITY All 737-100, 737-200, 737-200C, 737-300, 737-400, and 737-500 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.
Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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MATERIAL INFORMATION None.
THE UPPER AFT SKIN. IF ANY CRACK IS FOUND, DO A DETAILED INSPECTION FOR ANY CRACK IN LEFT WING
CONTACT THE BOEING COMPANY FOR REPAIR
INSTRUCTIONS AND DO THE REPAIR AND REPEAT
THE DETAILED INSPECTION IN THE UNREPAIRED WBL AREAS. IF NO CRACK IS FOUND, REPEAT THE DETAILED INSPECTION. WBL 17: 159 S-6 WBL S-5 187 _ S-4 WBL 200 WBL 220 * + NBD
LEFT WING SHOWN, RIGHT WING OPPOSITE Original Issue: May 24, 2017 Export Controlled ECCN: 9E991 - BOEING 737-57A1335 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 37
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-57A1335 Original Issue: May 24, 2017 ATA System: 5730 SUBJECT: WINGS - Plates/Skin - Upper Aft Skin at and Forward of the Rear Spar from Wing Buttock Line 159 to 220 - Inspection
THIS DOCUMENT 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 DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This service bulletin is applicable to all 737-100, 737-200, 737-200C, 737-300, 737-400, and 737-500 Airplanes in 2 Groups. The Variable Numbers and Group Information for the applicable airplanes is given below.
Refer to Service Bulletin Index D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP Airplane line numbers 1-291-1 Airplane line numbers 292-3132-2 Airplane Models:
737-100, 737-200, 737-200C, 737-300, 737-400, 737-500 GroupVariable Number 1PA001 - PA022 1PA099 1PA231 - PA232 1PC001 - PC005 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1PG001 - PG075 1PG199 1PG201 - PG230 1PG251 - PG255 1PG271 - PG279 1PG301 - PG314 1PG331 - PG332 1PG351 - PG356 1PG375 1PG401 - PG403 1PG431 - PG442 1PG471 - PG475 1PG501 - PG505 1PG571 - PG583 2PG584 - PG586 1PG621 - PG630 1PG651 - PG652 1PG701 - PG705 2PH001 2PH011 - PH013 2PH021 - PH024 1PH701 - PH715 1PH731 - PH732 1PH741 - PH742 2PH743 1PJ001 - PJ002 2PJ003 - PJ009 1PJ031 - PJ032 1PJ071 - PJ072 1PJ101 - PJ104 2PJ105 - PJ119 2PJ201 - PJ219 2PJ301 - PJ302 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 2PJ551 - PJ561 2PJ601 - PJ615 2PJ811 2PJ816 - PJ817 2PK026 - PK029 2PK041 - PK053 2PK061 - PK070 2PK081 - PK082 2PK091 - PK099 2PK101 - PK103 2PK111 - PK120 2PK141 - PK146 2PK201 - PK204 2PK211 - PK223 2PK231 - PK241 2PK251 - PK258 2PK271 - PK274 2PK281 - PK289 2PK291 2PK301 - PK318 2PK341 2PK351 - PK361 2PK391 2PK431 - PK433 2PK451 - PK452 2PK461 - PK469 2PK495 2PK501 - PK504 2PK511 - PK515 2PK519 2PK521 - PK528 2PK541 - PK565 2PK581 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 2PK591 - PK599 2PK601 - PK617 2PK621 - PK637 2PK641 - PK642 2PK661 - PK666 2PK671 - PK681 2PK691 - PK697 2PK711 - PK716 2PK731 - PK765 2PK771 - PK779 2PK801 - PK804 2PK819 - PK827 2PK830 2PK861 - PK863 2PK871 - PK874 2PK881 - PK884 2PK901 - PK938 2PK971 - PK974 2PL001 - PL028 2PL061 2PL081 2PL101 - PL113 2PL151 2PL171 - PL172 2PL201 - PL203 2PL221 2PL401 - PL417 2PL421 2PL441 2PL451 - PL456 2PL471 2PL491 2PL501 - PL506 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 24, 2017 737-57A1335 12 of 37 BOEING SERVICE BULLETIN 737-57A1335