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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-53A1352 Original Issue: October 02, 2015 Revision 1: March 10, 2016 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Unpublished Work.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 737-53A1352Revision 1: March 10, 2016 1 of 51
2.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 2 of 51 BOEING SERVICE BULLETIN 737-53A1352
ALERTALERT
BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION11
A. Effectivity11
1. Airplanes11
2. Spares Affected29
B. Concurrent Requirements29
C. Reason30
D. Description30
E. Compliance31
F. Approval32
G. Manpower33
H. Weight and Balance Changes34
I. Electrical Load Data34
J. References34
1. Existing Data:34
2. Data Supplied with this Service Bulletin:34
3. Installation Drawings Used in the Preparation of this Service Bulletin:34
K. Publications Affected35
L. Interchangeability and Intermixability of Parts35
M. Software Accomplishment Summary35
2. MATERIAL INFORMATION37
A. Material - Price and Availability37
B. Industry Support Information37
C. Parts Necessary for Each Airplane37
1. Kits/Parts37
2. Parts and Materials Supplied by the Operator37
3. Parts Modified and Reidentified37
4. Parts Removed and Not Replaced37
D. Parts Necessary to Change Spares37
E. Special Tooling - Price and Availability37
F. Special Tooling Necessary to do this Service Bulletin37
3. ACCOMPLISHMENT INSTRUCTIONS39
A. GENERAL INFORMATION39
B. WORK INSTRUCTIONS40
FIGURE 1: LFEC INSPECTION OF S-14 LAP SPLICE LOWER FASTENER ROW [Group 1]42
FIGURE 2: LFEC INSPECTION OF S-14 LAP SPLICE LOWER FASTENER ROW [Group 2]45
APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 1: INSPECTION FOR ANY
CRACK AT S-14 LAP SPLICE48
APPENDIX B: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 2: INSPECTION FOR ANY
CRACK AT S-14 LAP SPLICE50
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 3 of 51 BOEING SERVICE BULLETIN 737-53A1352
ALERTALERT
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 4 of 51 BOEING SERVICE BULLETIN 737-53A1352
ALERTALERT
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Commercial Airplanes 737 Service Bulletin ALERT Revision Transmittal SheetNumber: 737-53A1352Original Issue: October 02, 2015 Revision 1: March 10, 2016 ATA System: 5331 SUBJECT: FUSELAGE - Skin - S-14 Lap Splice Lower Fastener Row Inspection This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Effects of this Revision on airplanes on which Original Issue was previously done:
None.
Added airplane Line Number 5158 and Line Numbers between 5518 and 5721 to this service bulletin effectivity.
REASON FOR REVISION Revision 1 is sent to add airplanes to the effectivity that were inadvertently omitted at initial release.
These sections were changed:
1. In Paragraph 1.C., Reason, added compliance information related to this revision.
2. In Paragraph 1.D., Description, added reason for revision.
3. In Paragraph 1.F., Approval, revised Alternative Method of Compliance (AMOC) paragraph to reflect Revision 1.
Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity and format changes, to show the location of all content changes.
Pages with no vertical lines have no changes.
REVISION HISTORY October 02, 2015Original Issue:
March 10, 2016Revision 1:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 5 of 51
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 6 of 51 BOEING SERVICE BULLETIN 737-53A1352
ALERTALERT
BLANK PAGE
Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-53A1352Original Issue: October 02, 2015 Revision 1: March 10, 2016 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.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 7 of 51
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected 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.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 8 of 51 BOEING SERVICE BULLETIN 737-53A1352
ALERTALERT
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.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 9 of 51 BOEING SERVICE BULLETIN 737-53A1352
ALERTALERT
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 Revision 1: March 10, 2016 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 737-53A1352 Work - See page 1 for details. 10 of 51
Commercial Airplanes 737 Service Bulletin ALERT Number: 737-53A1352 Original Issue: October 02, 2015 Revision 1: March 10, 2016 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 6230.
Affected airplanes after Line Number 6230 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 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 11 of 51
GroupVariable Number 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 1YA751 - YA756 1YA801 - YA803 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 02, 2015 737-53A1352Revision 1: March 10, 2016 12 of 51 BOEING SERVICE BULLETIN 737-53A1352