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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-53A1352 Original Issue: October 02, 2015 ATA System: 5331 SUBJECT: FUSELAGE - Skin - S-14 Lap Splice Lower Fastener Row 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Unpublished Work.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: October 02, 2015 737-53A1352 1 of 49
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352 2 of 49 BOEING SERVICE BULLETIN 737-53A1352
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Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected27
B. Concurrent Requirements27
C. Reason28
D. Description28
E. Compliance29
F. Approval30
G. Manpower31
H. Weight and Balance Changes32
I. Electrical Load Data32
J. References32
1. Existing Data:32
2. Data Supplied with this Service Bulletin:32
3. Installation Drawings Used in the Preparation of this Service Bulletin:32
K. Publications Affected33
L. Interchangeability and Intermixability of Parts33
M. Software Accomplishment Summary33
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: LFEC INSPECTION OF S-14 LAP SPLICE LOWER FASTENER ROW [Group 1]40
FIGURE 2: LFEC INSPECTION OF S-14 LAP SPLICE LOWER FASTENER ROW [Group 2]43
APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 1: INSPECTION FOR ANY
CRACK AT S-14 LAP SPLICE46
APPENDIX B: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 2: INSPECTION FOR ANY
CRACK AT S-14 LAP SPLICE48
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352 3 of 49 BOEING SERVICE BULLETIN 737-53A1352
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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352 4 of 49 BOEING SERVICE BULLETIN 737-53A1352
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-53A1352Original Issue: October 02, 2015 ATA System: 5331 SUBJECT: FUSELAGE - Skin - S-14 Lap Splice Lower Fastener Row 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 Widespread Fatigue Damage (WFD) analysis of the 737NG, as required by 14 CFR 26.21(b), has resulted in the conclusion that the existing 737-600/700/800/900 MPD Section 9, Airworthiness Limitation Instruction (ALI) inspection program is not sufficient to preclude the occurrence of WFD in the S-14L and S-14R lap splice, lower fastener rows between STA 360-540 and STA 727-887 as the airplane ages. These lap splices have multiple adjacent identical details which have the potential for Multi-Site Damage (MSD) 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). Boeing has not received any in-service fleet reports of cracks in these lap splices. Accomplishment of the inspections described in this service bulletin will enable detection and repair of cracks if they should occur, at these lap splices. 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.
This Service Bulletin provides more frequent external inspection of the S-14 lap splices in order to prevent WFD out to the LOV.
The fuselage skin S-14L and S-14R lap splice lower fastener row between STA 360 to STA 540 and STA 727 to STA 887 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-53-00471 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: October 02, 2015 737-53A1352 5 of 49
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 Group 1:
1. Do PART 1: Low Frequency Eddy Current (LFEC) Inspection for any crack on the S-14L and S-14R lap splice, lower fastener row, between STA 360 to STA 540 and STA 727 to STA 887. If no crack is found, repeat PART 1: LFEC INSPECTION at the repeat interval in Paragraph 1.E., Compliance. If any crack is found, contact The Boeing Company to get instructions for S-14 lap splice crack repair and do the repair.
Group 2:
1. Do PART 1: Low Frequency Eddy Current (LFEC) Inspection for any crack on S-14L lap splice, lower fastener row, between STA 500 to STA 540 and STA 727 to STA 887 and S-14R lap splice, lower fastener row, between STA 360 to STA 540 and STA 727 to STA 887. If no crack is found, repeat PART 1: LFEC INSPECTION at the repeat interval in Paragraph 1.E., Compliance. If any crack is found, contact The Boeing Company for repair instructions and do the repair.
EFFECTIVITY All 737-600/-700/-700C/-800/-900/-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.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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This service bulletin affects Principle Structural Element (PSE) 53-30-04-6, 53-30-04-6a, 53-60-04-6 and 53-60-04-6a of Subsection B, Airworthiness Limitations-Structural Inspections of 737-600/700/800/900 MPD Section 9, 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 procedures given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION None.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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BOEING SERVICE BULLETIN 737-53A1352
ALERT ALERT STA 887 STA 540 STA 360 S-14L S-14R
UPPER SKIN
STRINGER
TYPICAL CRACK S-14 GROUP 1 - LOWER SKIN DO PART 1 LOW FREQUENCY EDDY CURRENT (LFEC) INSPECTION FOR ANY CRACK ON THE S-14L AND S-14R LAP SPLICE, LOWER FASTENER ROW, BETWEEN STA 360 TO STA 540 AND STA 727 TO STA 887 GROUP 2 DO PART 1 LOW FREQUENCY EDDY CURRENT (LFEC) INSPECTION FOR ANY CRACK ON THE S-14L LAP SPLICE, LOWER FASTENER ROW, BETWEEN STA 500 STA 540 AND STA 727 TO STA 887 AND S-14R LAP SPLICE, LOWER FASTENER ROW, BETWEEN STA 360 TO STA 540 AND STA 727 TO STA 887 RIGHT SIDE SHOWN LEFT SIDE OPPOSITE 2387015 Original Issue: October 02, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 737-53A1352 Work - See page 1 for details. 8 of 49
Commercial Airplanes 737 Service Bulletin ALERT Number: 737-53A1352 Original Issue: October 02, 2015 ATA System: 5331 SUBJECT: FUSELAGE - Skin - S-14 Lap Splice Lower Fastener Row 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 all 737-600/-700/-700C/-800/-900/-900ER Airplanes, line numbers 1-99999 in 2 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/-800/-900/-900ER Passenger airplane.-1 737-700C Convertible airplane.-2 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER GroupVariable Number 1YA001 - YA099 1YA101 - YA199 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352 9 of 49
GroupVariable Number 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 1YA751 - YA756 1YA801 - YA803 1YA809 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 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 1YB901 - YB903 1YB911 1YB961 - YB975 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1YB981 1YB986 - YB998 1YC001 - YC030 1YC051 - YC084 1YC091 - YC095 1YC101 - YC104 1YC111 - YC113 1YC121 1YC126 - YC127 1YC136 - YC141 1YC146 - YC147 1YC151 - YC156 1YC166 - YC171 1YC176 - YC179 1YC186 - YC190 1YC201 - YC203 1YC206 - YC207 1YC301 - YC305 1YC321 - YC387 1YC391 - YC394 1YC396 1YC401 - YC417 1YC421 - YC422 1YC426 - YC428 1YC436 - YC439 1YC441 - YC448 1YC451 - YC455 1YC459 1YC461 - YC467 1YC471 - YC499 1YC501 - YC526 1YC571 - YC583 1YC587 - YC589 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352 12 of 49 BOEING SERVICE BULLETIN 737-53A1352