TextPartly OCR
Some pages are OCR from a scan. OCR can misread letters and numbers.
Query with SQL
duckdb -csv -c "SELECT p.page, p.text_source, p.text, f.rights_holder, f.license FROM 'https://openairdocs.org/data/latest/service_document_file_page.parquet' p JOIN 'https://openairdocs.org/data/latest/service_document_file.parquet' f USING (file_sha256) WHERE p.file_sha256 = 'eb59457bf8ead24396e5d8997cc2065074406c6e6f28ce3eb08a987e57135473' ORDER BY p.page"
Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT p.page, p.text_source, p.text, f.rights_holder, f.license FROM 'https://openairdocs.org/data/latest/service_document_file_page.parquet' p JOIN 'https://openairdocs.org/data/latest/service_document_file.parquet' f USING (file_sha256) WHERE p.file_sha256 = 'eb59457bf8ead24396e5d8997cc2065074406c6e6f28ce3eb08a987e57135473' ORDER BY p.page
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION Number: 737-53-1294 Original Issue: March 31, 2011 Revision 2: December 09, 2015 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Lower Bulkhead Chords at Body Station 540 - Skin Inspection, Chord Splice Installation and Skin Repair 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 © 2011 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Unpublished Work.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: March 31, 2011 737-53-1294Revision 2: December 09, 2015 1 of 273
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 2 of 273 BOEING SERVICE BULLETIN 737-53-1294
BLANK PAGE
Table of Contents
Revision Transmittal Sheet7
S u m m a r y9
1. PLANNING INFORMATION ........................................ 1 3 A . E f f e c t i v i t y ............................................... 1 3
1. Airplanes ............................................ 1 3 2 . S p a r e s A f f e c t e d ........................................ 2 3 B. Concurrent Requirements ...................................... 2 3 C. Reason ................................................ 2 3 D. Description .............................................. 2 4 E. Compliance .............................................. 2 5 F . A p p r o v a l ............................................... 3 0 G. Manpower .............................................. 3 0 H. Weight and Balance Changes .................................... 3 4 I. Electrical Load Data ......................................... 3 5 J . R e f e r e n c e s .............................................. 3 5
1. Existing Data: ......................................... 3 5
2. Data Supplied with this Service Bulletin: ........................... 3 6
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 3 6 K. Publications Affected ........................................ 3 6 L. Interchangeability and Intermixability of Parts ........................... 3 6 M. Software Accomplishment Summary ................................ 3 6
2. MATERIAL INFORMATION ........................................ 3 7 A. Material - Price and Availability ................................... 3 7 B. Industry Support Information .................................... 3 9 C. Parts Necessary for Each Airplane ................................. 3 9 1 . K i t s / P a r t s ............................................ 3 9
2. Parts and Materials Supplied by the Operator ........................ 5 4
3. Parts Modified and Reidentified ................................ 5 5
4. Parts Removed and Not Replaced .............................. 5 5 D. Parts Necessary to Change Spares ................................. 5 5 E. Special Tooling - Price and Availability ............................... 5 5 F. Special Tooling Necessary to do this Service Bulletin ....................... 5 5
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 5 7 A. GENERAL INFORMATION ..................................... 5 7 B. WORK INSTRUCTIONS ....................................... 5 8 FIGURE 1: STA 540 BULKHEAD CHORDS - STRINGER S-22L TO S-23L - SKIN - DETAILED INSPECTION .................................................. 6 5 FIGURE 2: STA 540 BULKHEAD CHORDS - STRINGER S-22R TO S-23R - SKIN - DETAILED INSPECTION .................................................. 6 8 FIGURE 3: STA 540 BULKHEAD CHORDS - STRINGER S-22L TO S-23L - FASTENER HOLES - HFEC INSPECTION .......................................... 7 1 FIGURE 4: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SPLICE PREPARATION [Group 1-2, 4-5] ......................................... 7 3 FIGURE 5: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SPLICE INSTALLATION [Group 1-2, 4-5] ......................................... 7 5 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 3 of 273 BOEING SERVICE BULLETIN 737-53-1294
FIGURE 6: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SPLICE PREPARATION [Group 3] ............................................ 7 7 FIGURE 7: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SPLICE INSTALLATION [Group 3] ............................................ 7 9 FIGURE 8: STA 540 BULKHEAD CHORDS - STRINGER S-22R TO S-23R - FASTENER HOLES - HFEC INSPECTION .......................................... 8 1 FIGURE 9: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SPLICE PREPARATION .................................................. 8 3 FIGURE 10: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SPLICE INSTALLATION .................................................. 8 5 FIGURE 11: STA 540 BULKHEAD CHORDS - STRINGER S-22L - TRIM ................ 8 7 FIGURE 12: STA 540 BULKHEAD CHORDS - STRINGER S-22R - TRIM ................ 8 9 FIGURE 13: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - CRACK C U T - O U T............................................ 9 1 FIGURE 14: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - HOLE HFEC INSPECTION .......................................... 9 4 FIGURE 15: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - DRAG LINK ASSEMBLY REMOVAL .................................... 9 6 FIGURE 16: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - DOUBLER, TRIPLER AND FILLER FABRICATION ........................... 1 0 0 FIGURE 17: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - DOUBLER, TRIPLER AND FILLER INSTALLATION ........................... 1 0 7 FIGURE 18: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 1] ............................... 1 1 4 FIGURE 19: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 2] ............................... 1 2 3 FIGURE 20: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 3] ............................... 1 3 2 FIGURE 21: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 4] ............................... 1 4 1 FIGURE 22: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 5] ............................... 1 5 0 FIGURE 23: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - CRACK C U T - O U T........................................... 1 5 9 FIGURE 24: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - HOLE HFEC INSPECTION ......................................... 1 6 2 FIGURE 25: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - DRAG LINK ASSEMBLY REMOVAL .................................... 1 6 4 FIGURE 26: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - DOUBLER, TRIPLER AND FILLER FABRICATION ........................... 1 6 8 FIGURE 27: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - DOUBLER, TRIPLER AND FILLER INSTALLATION ........................... 1 7 5 FIGURE 28: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 1] ............................... 1 8 2 FIGURE 29: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 2] ............................... 1 9 1 FIGURE 30: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 3] ............................... 2 0 0 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 4 of 273 BOEING SERVICE BULLETIN 737-53-1294
FIGURE 31: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 4] ............................... 2 0 9 FIGURE 32: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - DRAG LINK ASSY INSTALLATION [Group 5] ............................... 2 1 8 FIGURE 33: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - SPLICE PLATE PREPARATION [Group 1-2, 4-5] .......................... 2 2 7 FIGURE 34: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - SPLICE PLATE INSTALLATION [Group 1-2, 4-5] .......................... 2 3 0 FIGURE 35: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - SPLICE PLATE PREPARATION [Group 3] .............................. 2 3 3 FIGURE 36: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - SKIN REPAIR - SPLICE PLATE INSTALLATION [Group 3] .............................. 2 3 6 FIGURE 37: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - SPLICE PLATE PREPARATION ................................... 2 3 9 FIGURE 38: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - SKIN REPAIR - SPLICE PLATE INSTALLATION .................................... 2 4 2 FIGURE 39: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - POST-REPAIR INSPECTIONS
- EXTERNAL SKIN DETAILED INSPECTION ........................ 2 4 5 FIGURE 40: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - POST-REPAIR INSPECTIONS
- EXTERNAL SKIN, DOUBLER AND TRIPLER LFEC AND HFEC INSPECTIONS .... 2 4 9 FIGURE 41: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - POST-REPAIR INSPECTIONS
- INTERNAL SKIN HFEC INSPECTION ........................... 2 5 2 FIGURE 42: STA 540 BULKHEAD CHORDS - STRINGERS S-22L TO S-23L - POST-REPAIR INSPECTIONS
- SPLICE STRAP AND BULKHEAD OUTER CHORD HFEC INSPECTIONS ....... 2 5 5 FIGURE 43: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - POST-REPAIR INSPECTIONS
- EXTERNAL SKIN DETAILED INSPECTION ........................ 2 5 8 FIGURE 44: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - POST-REPAIR INSPECTIONS
- EXTERNAL SKIN, DOUBLER AND TRIPLER LFEC AND HFEC INSPECTIONS .... 2 6 2 FIGURE 45: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - POST-REPAIR INSPECTIONS
- INTERNAL SKIN HFEC INSPECTION ........................... 2 6 5 FIGURE 46: STA 540 BULKHEAD CHORDS - STRINGERS S-22R TO S-23R - POST-REPAIR INSPECTIONS
- SPLICE STRAP AND BULKHEAD OUTER CHORD HFEC INSPECTIONS ....... 2 6 8 APPENDIX A: FORMING AND FITTING REQUIREMENTS FOR DETAIL METAL PARTS ....... 2 7 1 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 5 of 273 BOEING SERVICE BULLETIN 737-53-1294
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 6 of 273 BOEING SERVICE BULLETIN 737-53-1294
BLANK PAGE
Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION Revision Transmittal SheetNumber: 737-53-1294Original Issue: March 31, 2011 Revision 2: December 09, 2015 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Lower Bulkhead Chords at Body Station 540 - Skin Inspection, Chord Splice Installation and Skin Repair This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive AD 2013-19-04 is related to this service bulletin.
Effects of this Revision on airplanes on which Original Issue and Revision 1 were previously done:
Operators are encouraged to revise their existing aircraft maintenance schedule to accommodate the change to compliance time and the repeat inspection interval.
REASON FOR REVISION This revision is sent to change compliance time and the repeat inspection interval.
These sections were changed:
1. In Summary, changed the following:
– Background, added Service History Table and Boeing Service Related Problem (SRP).
– Compliance, added Federal Aviation Administration (FAA) Airworthiness Directive AD 2013-19-04.
2. In Paragraph 1.C., Reason, added Service History Table and Boeing Service Related Problem (SRP).
3. In Paragraph 1.E., Compliance, changed the following:
– Added Federal Aviation Administration (FAA) Airworthiness Directive AD 2013-19-04.
– In Table 1, changed Compliance Time and Repeat Interval.
– In Table 2, changed paragraph references.
4. In Paragraph 1.F., Approval, added Alternative Method Of Compliance (AMOC) statement for AD 2013-19-04.
5. In Paragraph 1.G., Manpower, revised tables for Skin Repair on left and right side.
6. In Paragraph 1.J., References, added Federal Aviation Administration (FAA) Airworthiness Directive AD 2013-19-04.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 7 of 273
7. In Paragraph 2.C.1., Kits/Parts, changed note to clarify kit requirements.
8. In Paragraph 2.C.2., Parts and Materials Supplied by the Operator, added sealant and changed Low Density Sealant Type.
9. In Paragraph 3.A., General Information, added general notes.
10. In Paragraph 3.B., Work Instructions, changed the following:
– PART 1, clarified inspection requirements.
– PART 4 - PART 5, changed access requirements and added instructions.
– PART 6 - PART 7, changed access requirements.
11. In Figures 3, 8, 14 and 24, changed footnote.
12. In Figures 4, 6, 9, 35 and 37, added new footnotes.
13. In Figures 5, 7, 10, 34, 36 and 38, changed Low Density Sealant Type.
14. In Figures 16, 17, 18, 19, 21, 26, 27, 28, 29 and 31 changed part numbers.
15. In Figure 33, added footnotes and changed illustration.
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 March 31, 2011Original Issue:
June 14, 2013Revision 1:
December 09, 2015Revision 2:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 8 of 273 BOEING SERVICE BULLETIN 737-53-1294
Commercial Airplanes 737 Service Bulletin
SPECIAL ATTENTION SummaryNumber: 737-53-1294Original Issue: March 31, 2011 Revision 2: December 09, 2015 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Lower Bulkhead Chords at Body Station 540 - Skin Inspection, Chord Splice Installation and Skin Repair BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY.
CONCURRENT REQUIREMENTS None.
BACKGROUND Accomplishment of this service bulletin will detect and prevent cracks in the skin common to the fasteners at the bulkhead chord joints at Body Station (STA) 540 between stringers S-22 and S-23 on both the left and right sides of the airplane. If the work given in this service bulletin is not accomplished fatigue cracks may develop in the skin common to the fasteners and the bulkhead chord joints at STA 540 between stringers S-22 and S-23.
If not corrected, cracks in the skin can result in difficulty to achieve pressurization or rapid decompression of the cabin.
One operator reported finding cracks in the skin on a 737-700 series airplane at STA 540 just below stringer S-22L. A Boeing investigation revealed that the design at STA 540 bulkhead chords has insufficient load path where the chords meet between stringers S-22 and S-23 on both the left and right sides of the airplane. As a result, fatigue cracks may develop in the skin common to the fasteners at the bulkhead chord joints at STA 540 between stringers S-22 and S-23 on both the left and right sides of the airplane.
Service History Flight-HoursFlight-Cycles Crack Length Model Right Side Left Side 56,75733,3282.40-737-700 52,23723,6465.75-737-700 54,02031,2014.50-737-700 36,66522,635-2.125737-700 This service bulletin is issued to give instructions to inspect the skin at STA 540 around the lower bulkhead chords between stringer S-22 and S-23 on both the left and right sides of the airplane. It is also issued to give instructions to install a splice at the STA 540 bulkhead chords between stringer S-22 and S-23 on both the left and right sides of the airplane.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 9 of 273
Boeing Service Related Problem (SRP) 737NG-SRP-53-0328 and 737NG-SRP-53-0478 are 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., ComplianceYesAD Related Paragraph 1.H., Weight and Balance ChangesYesWeight 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/PartsYesKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin YesSpecial Tooling Required ACTION (PRR 38275-140S) Remove the wing-to-body-fairings 192BL and 192BR for access. Do detailed and High Frequency Eddy Current (HFEC) inspections of the skin around the eight fasteners common to the ends of the STA 540 bulkhead chords between stringer S-22 and stringer S-23 for any crack on the left and right sides of the airplane. If any crack is found in the skin, install a skin repair on that side of the airplane and install a chord splice as a preventive modification on the non-cracked side of the airplane. If any crack is found in the chords, contact The Boeing Company for repair instructions and do the repair. If no crack is found, install a chord splice on both sides of the airplane as a preventive modification or repeat the inspection. If a skin repair is installed do post-repair detailed and HFEC inspections of the repaired area.
EFFECTIVITY 737-600, 737-700, 737-700C, 737-800, 737-900 Series Airplanes. Refer to Paragraph 1.A., Effectivity for the list of affected airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directive AD 2013-19-04 is related to this service bulletin.
The effective date of AD 2013-19-04 is November 4, 2013.
Refer to Paragraph 1.E., Compliance.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 10 of 273 BOEING SERVICE BULLETIN 737-53-1294
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are available for airplanes in warranty as of February 01, 2008. Please refer to Paragraph 2.B., Industry Support Information.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 31, 2011 737-53-1294Revision 2: December 09, 2015 11 of 273 BOEING SERVICE BULLETIN 737-53-1294
BOEING SERVICE BULLETIN 737-53-1294 STA 540 S-22L S-23L S-22L S-23L LEFT SIDE SHOWN, 1844852
RIGHT SIDE SIMILAR Original Issue: March 31, 2011 Revision 2: December 09, 2015 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 737-53-1294 Work - See page 1 for details. 12 of 273