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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-53A1365 Original Issue: January 23, 2017 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 © 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Unpublished Work.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: January 23, 2017 737-53A1365 1 of 40
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 23, 2017 737-53A1365 2 of 40 BOEING SERVICE BULLETIN 737-53A1365
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Table of Contents
Summary5
1. PLANNING INFORMATION11
A. Effectivity11
1. Airplanes11
2. Spares Affected15
B. Concurrent Requirements15
C. Reason15
D. Description16
E. Compliance16
F. Approval19
G. Manpower19
H. Weight and Balance Changes20
I. Electrical Load Data20
J. References20
1. Existing Data:20
2. Data Supplied with this Service Bulletin:20
3. Installation Drawings Used in the Preparation of this Service Bulletin:20
K. Publications Affected21
L. Interchangeability and Intermixability of Parts21
M. Software Accomplishment Summary21
2. MATERIAL INFORMATION23
A. Material - Price and Availability23
B. Industry Support Information23
C. Parts Necessary for Each Airplane23
1. Kits/Parts23
2. Parts and Materials Supplied by the Operator23
3. Parts Modified and Reidentified23
4. Parts Removed and Not Replaced23
D. Parts Necessary to Change Spares23
E. Special Tooling - Price and Availability23
F. Special Tooling Necessary to do this Service Bulletin23
3. ACCOMPLISHMENT INSTRUCTIONS25
A. GENERAL INFORMATION25
B. WORK INSTRUCTIONS26
FIGURE 1: EDDY CURRENT INSPECTION OF S-14 SKIN LAP SPLICE LOWER FASTENER ROW [Group
1]29
FIGURE 2: EDDY CURRENT INSPECTION OF S-14 SKIN LAP SPLICE LOWER FASTENER ROW [Group
2]32
APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE TABLE 1: EDDY CURRENT INSPECTION FOR ANY CRACK AT S-14 SKIN LAP SPLICE [Group 1-2, Configuration 1] . 35 APPENDIX B: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 2: EDDY CURRENT INSPECTION FOR ANY CRACK AT S-14 LAP SPLICE POST-SSID INSPECTIONS [Group
1-2, Configuration 2]39
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 23, 2017 737-53A1365 3 of 40 BOEING SERVICE BULLETIN 737-53A1365
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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 23, 2017 737-53A1365 4 of 40 BOEING SERVICE BULLETIN 737-53A1365
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-53A1365Original Issue: January 23, 2017 ATA System: 5331 SUBJECT: FUSELAGE - Skin - S-14 Lap Splice Lower Fastener Row 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 This service bulletin gives instructions to do inspections for any crack in the lower skin, at the S-14 skin lap splice lower fastener row, from STA 370 to STA 927 on the left side and STA 344 to STA 927 on the right side of the airplane. If the work given in this service bulletin is not accomplished, any crack in the lower skin could remain undetected. If cracks at this location go undetected, the cracks could link up resulting in an uncontrolled decompression of the airplane.
One operator of 737-300 airplanes, reported crack indications found in the lower skin at the S-14 lap splice lower row while accomplishing window belt replacements from STA 360 to STA 540, and STA 727 to STA 908. Further investigation into these reports of cracks in the lower skin at the lap splice lower row have identified small cracks and cracks from scratches. 51 airplanes were inspected and 22 crack indications were reported from 42,358 to 48,188 total flight cycles and 53,490 to 58,796 total flight hours.
Airplanes prior to line number 2566 are covered by Service Bulletin (SB) 737-53A1255. This SB applies to airplanes from line number 2566 to 3132.
Boeing Fleet Team Digest 737 FTD 53-15006 is related to this service bulletin.
Service Related Problem 737-SRP-53-0523 is related to this service bulletin.
The lap splice fuselage lower fastener row in the lower skin has been determined to be structure that is susceptible to Widespread Fatigue Damage (WFD).
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: January 23, 2017 737-53A1365 5 of 40
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:
Do an external Eddy Current inspection for any crack in the lower skin at the skin lap splice lower fastener row.
The inspections are accomplished at stringer S-14L from STA 370 to STA 520 and STA 727A to STA 927 and at S-14R from STA 344 to STA 520 and STA 727A to STA 927. If no crack is found, repeat eddy current 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. Repeat eddy current inspection at unrepaired areas at the repeat interval in Paragraph 1.E., Compliance.
Group 2:
Do an external Eddy Current inspection for any crack in the lower skin at the skin lap splice lower fastener row.
The inspections are accomplished at stringer S-14L from STA 370 to STA 500F and STA 727A to STA 927 and at S-14R from STA 344 to STA 520 and STA 727A to STA 927. If no crack is found, repeat eddy current 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. Repeat eddy current inspection at unrepaired areas at the repeat interval in Paragraph 1.E., Compliance.
EFFECTIVITY 737-300/-400/-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 procedures given in this service bulletin.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 23, 2017 737-53A1365 6 of 40 BOEING SERVICE BULLETIN 737-53A1365
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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: January 23, 2017 737-53A1365 7 of 40 BOEING SERVICE BULLETIN 737-53A1365
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BOEING SERVICE BULLETIN 737-53A1365
ALERT ALERT STA 927 STA 520 SźTA STA 344 S-14R' S-14L STA 370 737-300/-500 (TYPICAL)
UPPER SKIN
• GROUP 1:
DO AN EDDY CURRENT INSPECTION FOR ANY CRACK. IF ANY CRACK IS
FOUND, CONTACT THE BOEING
COMPANY FOR REPAIR INSTRUCTIONS AND DO THE REPAIR.
IF NO CRACK IS FOUND, REPEAT EDDY CURRENT INSPECTION.
14144141 088.
S-14L' TYPICAL CRACK
LOWER SKIN TYPICAL 2476098 Original Issue: January 23, 2017 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING Work - See page 1 for details. 737-53A1365 8 of 40
BOEING SERVICE BULLETIN 737-53A1365
ALERT ALERT STA 927
SZTA STA 500F STA 370
• S-14L *S-14R STA 344 737-400 (TYPICAL)
UPPER SKIN GROUP 2:
DO AN EDDY CURRENT INSPECTION FOR ANY CRACK. IF ANY CRACK IS
FOUND, CONTACT THE BOEING
COMPANY FOR REPAIF INSTRUCTIONS AND DO THE REPAIR.
IF NO CRACK IS FOUND, REPEAT EDDY CURRENT INSPECTION.
TYPICAL CRACK S-14R
LOWER SKIN TYPICAL 2537666 Original Issue: January 23, 2017 Export Controlled ECCN: 9E991 - BOEING 737-53A1365 PROPRIETARY - Copyright Unpublished Work - See page 1 for details. 9 of 40
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 23, 2017 737-53A1365 10 of 40 BOEING SERVICE BULLETIN 737-53A1365
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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-53A1365 Original Issue: January 23, 2017 ATA System: 5331 SUBJECT: FUSELAGE - Skin - S-14 Lap Splice Lower Fastener Row 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 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 737-300/-400/-500 Airplanes, line numbers 2566-3132 in 2 Groups. The Variable Numbers and Group Information for the applicable airplanes is given below.
DESCRIPTIONCONFIGURATIONGROUP 737-300/-500 Airplanes line numbers 2566-3132.-1 737-300/-500 Airplanes line numbers 2566-3132 that have not accomplished SSID F-48B inspections.
1 737-300/-500 Airplanes line numbers 2566-3132 that have accomplished SSID F-48B inspections.
2 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 23, 2017 737-53A1365 11 of 40
DESCRIPTIONCONFIGURATIONGROUP 737-400 Airplanes line numbers 2566-3132.-2 737-400 Airplanes line numbers 2566-3132 that have not accomplished SSID F-48B inspections.
1 737-400 Airplanes line numbers 2566-3132 that have accomplished SSID F-48B inspections.
2 Airplane Models:
737-300, 737-400, 737-500 GroupVariable Number 2PJ553 - PJ561 2PJ601 - PJ615 2PJ811 2PJ816 - PJ817 1PM548 - PM550 1PP518 - PP520 1PP876 - PP877 1PQ297 - PQ299 1PQ345 - PQ348 1PQ370 - PQ373 1PQ391 - PQ395 1PQ409 - PQ410 1PQ414 - PQ418 1PQ431 - PQ438 1PQ447 - PQ448 1PQ451 1PQ454 1PQ474 - PQ475 1PQ772 1PQ933 - PQ935 1PQ951 1PQ971 - PQ997 1PR001 - PR017 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: January 23, 2017 737-53A1365 12 of 40 BOEING SERVICE BULLETIN 737-53A1365