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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-53A1351 Original Issue: July 08, 2015 ATA System: 5330 SUBJECT: FUSELAGE - Skin - Window Corner 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 © 2015 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Unpublished Work.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: July 08, 2015 737-53A1351 1 of 53
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 08, 2015 737-53A1351 2 of 53 BOEING SERVICE BULLETIN 737-53A1351
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Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected27
B. Concurrent Requirements27
C. Reason27
D. Description28
E. Compliance28
F. Approval32
G. Manpower32
H. Weight and Balance Changes33
I. Electrical Load Data33
J. References33
1. Existing Data:33
2. Data Supplied with this Service Bulletin:33
3. Installation Drawings Used in the Preparation of this Service Bulletin:33
K. Publications Affected33
L. Interchangeability and Intermixability of Parts34
M. Software Accomplishment Summary34
2. MATERIAL INFORMATION35
A. Material - Price and Availability35
B. Industry Support Information35
C. Parts Necessary for Each Airplane35
1. Kits/Parts35
2. Parts and Materials Supplied by the Operator35
3. Parts Modified and Reidentified35
4. Parts Removed and Not Replaced35
D. Parts Necessary to Change Spares35
E. Special Tooling - Price and Availability35
F. Special Tooling Necessary to do this Service Bulletin35
3. ACCOMPLISHMENT INSTRUCTIONS37
A. GENERAL INFORMATION37
B. WORK INSTRUCTIONS38
FIGURE 1: EXTERNAL INSPECTION OF THE UPPER FORWARD AND LOWER AFT WINDOW CORNER,
STA 360 TO STA 540 LEFT SIDE40
FIGURE 2: EXTERNAL INSPECTION OF THE UPPER FORWARD AND LOWER AFT WINDOW CORNER,
STA 360 TO STA 540 RIGHT SIDE42
FIGURE 3: EXTERNAL INSPECTION OF THE LOWER FORWARD AND UPPER AFT WINDOW CORNER,
STA 727 TO STA 887 LEFT SIDE44
FIGURE 4: EXTERNAL INSPECTION OF THE LOWER FORWARD AND UPPER AFT WINDOW CORNER,
STA 727 TO STA 887 RIGHT SIDE46
APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 1: WINDOW CORNER EXTERNAL INSPECTION FROM STA 360 TO STA 540 AND FROM STA 727 TO STA 887
[Group 1]48
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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APPENDIX B: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 2: WINDOW CORNER EXTERNAL INSPECTION FROM STA 360 TO STA 540 AND FROM STA 727 TO STA 887
[Group 2]50
APPENDIX C: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 3: WINDOW CORNER EXTERNAL INSPECTION FROM STA 360 TO STA 540 AND FROM STA 727 TO STA 887
[Group 3]52
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 08, 2015 737-53A1351 4 of 53 BOEING SERVICE BULLETIN 737-53A1351
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-53A1351Original Issue: July 08, 2015 ATA System: 5330 SUBJECT: FUSELAGE - Skin - Window Corner Inspection
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 This service bulletin gives instructions to inspect for any crack in the skin around fasteners in window corners from STA 360 to STA 540 and from STA 727 to STA 887, left and right side between stringers S-10 and S-14.
Widespread Fatigue Damage (WFD) analysis of the 737NG, as required by 14 CFR 26.21(b), has resulted in the conclusion that the existing MPD Section 9, Airworthiness Limitation Instruction (ALI) inspection program is not sufficient to preclude the occurrence of WFD in the window corner surround structure from STA 360 to STA 540 and from STA 727 to STA 887, left and right sides between S-10 and S-14, as the airplane ages. The window corner surround structure has multiple adjacent identical details which have the potential for Multi-Element Damage (MED) and the potential for WFD. 14 CFR 26.21 requires evaluation of such designs for the potential for WFD and implementation of the appropriate service actions to ensure that WFD is precluded out to the Limit of Validity (LOV). Accomplishment of the inspections described in this service bulletin will enable detection and repair of cracks if they should occur, at the window corner surround structure. Boeing has not received any in-service fleet reports of cracks in the window corner surround structure. If widespread fatigue cracking is not found and repaired, the cracks can rapidly link up and can result in possible rapid decompression and loss of structural integrity.
The window corner surround structure from STA 360 to STA 540 and from STA 727 to STA 887, left and right sides between S-10 and S-14, has been determined to be structure that is susceptible to WFD.
Boeing Fleet Team Digest 737NG FTD 53-14001 is related to this service bulletin Boeing Service Related Problem (SRP) 737NG-SRP-53-0474 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 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 08, 2015 737-53A1351 5 of 53
ReferenceAffectedPlanning Data Paragraph 1.E., Compliance and Paragraph
1.F., Approval YesAD Related 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 Do an external High Frequency Eddy Current (HFEC) inspection of the skin around fasteners in window corners from STA 360 to STA 540 and from STA 727 to STA 887. If no crack is found, do repeat inspections. If any crack is found, contact The Boeing Company for work instructions and do the work.
EFFECTIVITY All 737-600, -700, -700C, -800, -900, and -900ER 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.
Federal Aviation Administration (FAA) Airworthiness Directive AD 2013-19-23 is related to this service bulletin.
The effective date of AD 2013-19-23 is November 7, 2013.
This service bulletin affects Principle Structural Element (PSE) 53-30-05-1, 53-30-05-2, 53-30-05-3, 53-60-05-1, 53-60-05-2, and 53-60-05-3 of Subsection B, Airworthiness Limitations-Structural Inspections of Section 9 of the 737-600/700/800/900 MPD 626A001-CMR, which is mandated by AD 2013-19-23.
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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BOEING SERVICE BULLETIN 737-53A1351
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MATERIAL INFORMATION None.
STA 887
STA STA 540 727 S-10L STA 360 S-10L
- S-14L
DO EXTERNAL HIGH FREQUENCY EDDY
CURRENT (HFEC) INSPECTIONS OF THE SKIN
AT UPPER AFT AND LOWER FORWARD WINDOW CORNERS FROM STA 727 TO STA 887.
STA 727-887 (TYPICAL) S-14L-
DO EXTERNAL HFEC INSPECTIONS OF THE SKIN
AT LOWER AFT AND UPPER FORWARD WINDOW CORNERS FROM STA 360 TO STA 540.
STA 360-540 2391335 (TYPICAL) Original Issue: July 08, 2015 Export Controlled ECCN: 9E991 - BOEING 737-53A1351 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 53
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 08, 2015 737-53A1351 8 of 53 BOEING SERVICE BULLETIN 737-53A1351
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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-53A1351 Original Issue: July 08, 2015 ATA System: 5330 SUBJECT: FUSELAGE - Skin - Window Corner Inspection
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 Refer to Service Bulletin Index D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is applicable to 737-600/-700/-700C/-800/-900/-900ER Airplanes, line numbers 1-99999 in 3 Groups. The Variable Numbers and Group Information for the applicable airplanes is given below.
NOTE: The Variable Number table below includes all affected airplanes up to Line Number 6060.
Affected airplanes after Line Number 6060 will be added to the service bulletin's MyBoeingFleet.com (MBF) "get effectivity" result when they are added to the MBF Fleet Profile Page.
DESCRIPTIONCONFIGURATIONGROUP 737-600/700 airplanes.-1 737-700C/900 airplanes.-2 737-800/900ER airplanes.-3 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 08, 2015 737-53A1351 9 of 53
GroupVariable Number 1YA001 - YA099 1YA101 - YA199 1YA201 - YA211 1YA221 1YA231 - YA242 1YA251 - YA256 1YA271 - YA272 1YA291 1YA301 - YA302 1YA311 - YA314 1YA321 - YA323 1YA336 - YA345 1YA351 1YA356 - YA357 1YA366 - YA367 1YA371 - YA377 1YA501 - YA536 1YA541 - YA552 1YA571 - YA578 1YA601 - YA615 1YA621 - YA622 1YA626 - YA631 1YA635 - YA636 1YA641 - YA642 1YA645 - YA650 1YA656 - YA659 1YA666 - YA667 1YA671 - YA672 1YA681 - YA691 1YA701 - YA710 1YA721 - YA722 1YA731 - YA734 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1YA751 - YA756 1YA801 - YA803 1YA809 1YA811 - YA814 1YA831 - YA835 1YA841 - YA862 1YA881 - YA882 1YA891 - YA892 1YA961 - YA978 1YB001 - YB006 1YB101 - YB132 1YB151 - YB153 1YB156 - YB158 1YB161 - YB164 1YB171 - YB172 1YB181 - YB184 1YB201 - YB208 1YB271 1YB276 1YB301 - YB310 1YB371 - YB392 1YB501 - YB502 1YB521 - YB526 1YB541 - YB544 1YB551 1YB561 - YB598 1YB601 - YB636 1YB651 1YB656 1YB671 - YB672 1YB851 - YB863 1YB871 - YB874 1YB881 - YB893 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1YB901 - YB903 1YB911 1YB961 - YB975 1YB981 1YB986 - YB998 3YC001 - YC030 3YC051 - YC084 3YC091 - YC095 3YC101 - YC104 3YC111 - YC113 3YC121 3YC126 - YC127 3YC136 - YC141 3YC146 - YC147 3YC151 - YC156 3YC166 - YC171 3YC176 - YC179 3YC186 - YC190 3YC201 - YC203 3YC206 - YC207 3YC301 - YC305 3YC321 - YC387 3YC391 - YC394 3YC396 3YC401 - YC417 3YC421 - YC422 3YC426 - YC428 3YC436 - YC439 3YC441 - YC448 3YC451 - YC455 3YC459 3YC461 - YC467 3YC471 - YC499 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: July 08, 2015 737-53A1351 12 of 53 BOEING SERVICE BULLETIN 737-53A1351