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 = '810d1c96a56b436a3a0277f2969d84db41aafdf87f42db84e4b6d88d5a0cc77b' 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 = '810d1c96a56b436a3a0277f2969d84db41aafdf87f42db84e4b6d88d5a0cc77b' 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 ALERT Number: 737-53A1325 Original Issue: December 03, 2013 ATA System: 5311 SUBJECT: FUSELAGE - Frames and Bulkheads - Body Station (STA) 727 Bulkhead Lower Frame Web and Inner Chord - Inspection, Preventive Modification and 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 © 2013 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Unpublished Work.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: December 03, 2013 737-53A1325 1 of 138
6.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 2 of 138 BOEING SERVICE BULLETIN 737-53A1325
ALERTALERT
BLANK PAGE
Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 1 2 B. Concurrent Requirements ...................................... 1 2 C. Reason ................................................ 1 2 D. Description .............................................. 1 3 E. Compliance .............................................. 1 4 F. Approval ............................................... 2 3 G. Manpower .............................................. 2 3 H. Weight and Balance Changes .................................... 2 6 I. Electrical Load Data ......................................... 2 6 J. References .............................................. 2 6
1. Existing Data: ......................................... 2 6
2. Data Supplied with this Service Bulletin: ........................... 2 7
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 7 K. Publications Affected ........................................ 2 7 L. Interchangeability and Intermixability of Parts ........................... 2 7 M. Software Accomplishment Summary ................................ 2 7
2. MATERIAL INFORMATION ........................................ 2 9 A. Material - Price and Availability ................................... 2 9 B. Industry Support Information .................................... 2 9 C. Parts Necessary for Each Airplane ................................. 3 0
1. Kits/Parts: ........................................... 3 0
2. Parts and Materials Supplied by the Operator: ........................ 3 4
3. Parts Modified and Reidentified: ............................... 3 4
4. Parts Removed and Not Replaced: .............................. 3 4 D. Parts Necessary to Change Spares ................................. 3 4 E. Special Tooling - Price and Availability ............................... 3 4 F. Special Tooling Necessary to do this Service Bulletin ....................... 3 5
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 3 7 A. GENERAL INFORMATION ..................................... 3 7 B. WORK INSTRUCTIONS ....................................... 3 8 FIGURE 1: BODY STATION (STA) 727 LOWER FRAME WEB AND INNER CHORD - INSPECTION - LEFT AND RIGHT SIDE [Group 1] .................................. 4 5 FIGURE 2: BODY STATION (STA) 727 LOWER FRAME WEB AND INNER CHORD - INSPECTION - RIGHT SIDE [Group 2-3] .................................... 4 9 FIGURE 3: BODY STATION (STA) 727 LOWER FRAME PREVENTIVE MODIFICATION - LEFT SIDE [Group 1] ............................................ 5 2 FIGURE 4: BODY STATION (STA) 727 LOWER FRAME PREVENTIVE MODIFICATION - RIGHT SIDE .................................................. 5 7 FIGURE 5: BODY STATION (STA) 727 LOWER FRAME REPAIR 1 - LEFT SIDE [Group 1] ..... 6 2 FIGURE 6: BODY STATION (STA) 727 LOWER FRAME REPAIR 1 - RIGHT SIDE .......... 6 9 FIGURE 7: BODY STATION (STA) 727 LOWER FRAME REPAIR 2 - LEFT SIDE [Group 1] ..... 7 6 FIGURE 8: BODY STATION (STA) 727 LOWER FRAME REPAIR 2 - RIGHT SIDE .......... 8 5 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 3 of 138 BOEING SERVICE BULLETIN 737-53A1325
ALERTALERT
FIGURE 9: BODY STATION (STA) 727 LOWER FRAME REPAIR 3 - LEFT SIDE [Group 1] ..... 9 4 FIGURE 10: BODY STATION (STA) 727 LOWER FRAME REPAIR 3 - RIGHT SIDE ......... 1 0 3 FIGURE 11: LEFT SIDE - LOWER FRAME WEB AND INNER CHORD - POST REPAIR 1 INSPECTIONS [Group 1, 3] .......................................... 1 1 2 FIGURE 12: RIGHT SIDE - LOWER FRAME WEB AND INNER CHORD - POST REPAIR 1 INSPECTIONS ................................................. 1 1 5 FIGURE 13: LEFT SIDE - LOWER FRAME WEB AND INNER CHORD - POST REPAIR 2 INSPECTIONS [Group 1] ............................................ 1 1 8 FIGURE 14: RIGHT SIDE - LOWER FRAME WEB AND INNER CHORD - POST REPAIR 2 INSPECTIONS ................................................. 1 2 1 FIGURE 15: LEFT SIDE - LOWER FRAME WEB AND INNER CHORD - POST REPAIR 3 INSPECTIONS [Group 1] ............................................ 1 2 4 FIGURE 16: RIGHT SIDE - LOWER FRAME WEB AND INNER CHORD - POST REPAIR 3 INSPECTIONS ................................................. 1 2 7 FIGURE 17: LEFT SIDE - LOWER FRAME WEB AND INNER CHORD - POST PREVENTIVE MODIFICATION INSPECTIONS [Group 1] ................................... 1 3 0 FIGURE 18: RIGHT SIDE - LOWER FRAME WEB AND INNER CHORD - POST PREVENTIVE MODIFICATION INSPECTIONS ............................... 1 3 3 APPENDIX A: COMPLIANCE FLOW DIAGRAM FOR STA 727 FRAME INSPECTION, REPAIR AND MODIFICATION [Group 1] .................................. 1 3 6 APPENDIX B: COMPLIANCE FLOW DIAGRAM FOR RIGHT SIDE STA 727 FRAME INSPECTION, REPAIR AND MODIFICATION [Group 2] ............................... 1 3 7 APPENDIX C: COMPLIANCE FLOW DIAGRAM FOR STA 727 FRAME INSPECTION, REPAIR AND MODIFICATION [Group 3] .................................. 1 3 8 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 4 of 138 BOEING SERVICE BULLETIN 737-53A1325
ALERTALERT
Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-53A1325Original Issue: December 03, 2013 ATA System: 5311 SUBJECT: FUSELAGE - Frames and Bulkheads - Body Station (STA) 727 Bulkhead Lower Frame Web and Inner Chord - Inspection, Preventive Modification and Repair
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 The inspections given in this service bulletin will detect cracks in the Body Station (STA) 727 bulkhead lower frame web and inner chord before they reach a critical length. The changes given in this service bulletin will decrease the occurrence of cracks at the STA 727 bulkhead lower frame web and inner chord. This area is a primary structural element (PSE). If the inspections given in this service bulletin are not accomplished undetected cracks could result in severed frames and induced skin cracks at these locations. This could lead to rapid decompression of the fuselage.
The STA 727 bulkhead lower frames have been determined to be structure that is susceptible to Widespread Fatigue Damage (WFD).
Boeing has received reports of cracking on four airplanes in the lower bulkhead frame as shown in the service history table below.
Service History - Model 737-600/-700 ReportFlight Cycles/Flighthours One crack extending 0.25 inches outboard from the fastener hole. (a)25,544/ 44,100 One crack extending 0.50 inches outboard from the fastener hole. (a)23,682/ 40,381 One crack extending 0.50 inch outboard from the fastener hole, and one crack extending inboard through the frame radius into the inner chord flange. (a) 25,616/ 44,061 One crack was found at a fastener in the STA 727 frame web at Left Buttock Line (LBL) 60. The crack measures 0.50 inch, extending inboard. (a) 25,435/43,543 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 5 of 138
Service History - Model 737-600/-700 ReportFlight Cycles/Flighthours
(a) All cracks reported occur in the lower frame web and originates at the 5/16 Inch diameter fastener location adjacent to the inboard chord and common to the STA 727 bulkhead compression chord.
737-600/700 airplanes after line number 1179 have a different frame assembly installed in production that has a thicker web and chord in the areas prone to cracking.
Airplanes variable number YA026, YA035, and YA036 had a repair installed in the left side STA 727 Bulkhead lower frame web before the original issue of this service bulletin.
Airplane variable number YA075 had a repair, which is equivalent to Repair 1 in this service bulletin, installed in the left side STA 727 Bulkhead lower frame web before the original issue of this service bulletin.
Boeing Service Related Problem (SRP) 737NG-53-0384 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 Paragraph 1.E., Compliance and Paragraph
1.F., Approval YesAD 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 NoSpecial Tooling Required ACTION (PRR 38275-185RS) Group 1:
Do detailed inspections on the left and right side, for cracking in the lower frame web and inner chord at STA 727, and an open hole high frequency eddy current (HFEC) inspection at one fastener location in the lower frame web adjacent to the inner chord. If any crack is found in the lower frame web or inner chord that is greater than 1.50 inches and does not extend into the flange of the inner chord, contact Boeing to get repair instructions, and do the work instructed by Boeing. If any crack is found in the lower frame web or inner chord that extends into the flange of the inner chord or is not greater than 1.50 inches, do the applicable left or right side repair in accordance with this service bulletin. If a repair or modification is not installed, repeat the inspection.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 6 of 138 BOEING SERVICE BULLETIN 737-53A1325
ALERTALERT
Group 2:
Do detailed inspections on the right side only, for cracking in the lower frame web and inner chord at STA 727, and an open hole HFEC inspection at one fastener location in the lower frame web adjacent to the inner chord.
If any crack is found in the lower frame web or inner chord that is greater than 1.50 inches and does not extend into the flange of the inner chord, contact Boeing to get repair instructions, and do the work instructed by Boeing.
If any crack is found in the lower frame web or inner chord that extends into the flange of the inner chord or is not greater than 1.50 inches, do the applicable right side repair in accordance with this service bulletin. If a repair or modification is not installed, repeat the inspection. Contact Boeing for left side inspection and modification instructions, and do the work instructed by Boeing.
Group 3:
Do detailed inspections on the right side, for cracking in the lower frame web and inner chord at STA 727, and an open hole HFEC inspection at one fastener location in the lower frame web adjacent to the inner chord. If any crack is found in the right lower frame web or inner chord that is greater than 1.50 inches and does not extend into the flange of the inner chord, contact Boeing to get repair instructions, and do the work instructed by Boeing. If any crack is found in the right lower frame web or inner chord that extends into the flange of the inner chord or is not greater than 1.50 inches, do the applicable right side repair in accordance with this service bulletin. If a repair or modification is not installed on the right side, repeat the inspection. Do a HFEC inspection for any cracking in the modified left lower frame web and inner chord at STA 727. If any crack is found on the lower frame web, contact Boeing for repair instructions and do the work instructed by Boeing. If no cracking is found on the left side, repeat the inspection.
Group 1:
Do post repair/post modification inspections on the left and right side, for cracks in the lower frame web and inner chord. If any crack is found, contact Boeing for repair instructions and do the work instructed by Boeing.
Group 2-3:
Do post repair/post modification inspections on the right side only, for cracks in the lower frame web and inner chord. If any crack is found contact Boeing for the repair instructions and do the work instructed by Boeing.
EFFECTIVITY 737-600/700 passenger 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 available for airplanes in warranty as of June 2, 2011. Please refer to Paragraph
2.B., Industry Support Information.
MANPOWER Refer to Paragraph 1.G., Manpower.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 7 of 138 BOEING SERVICE BULLETIN 737-53A1325
ALERTALERT
BOEING SERVICE BULLETIN 737-53A1325
ALERT ALERT
MATERIAL INFORMATION Boeing Supplied Kits Refer to Paragraph 2.A., Material - Price and Availability.
STA 727 STA 727
INSPECT FOR CRACKS IN THE LOWER FRAME WEB AND INNER CHORD. IF ANY CRACK IS FOUND, INSTALL A REPAIR. IF
NO CRACKING IS FOUND, INSTALL A
MODIFICATION OR CONTINUE REPEAT
INSPECTIONS DO POST MODIFICATION /REPAIR INSPECTION OF THE LOWER FRAME AT GIVEN INTERVALS.
2178688 Original Issue: December 03, 2013 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 737-53A1325 Work - See page 1 for details. 8 of 138
Commercial Airplanes 737 Service Bulletin ALERT Number: 737-53A1325 Original Issue: December 03, 2013 ATA System: 5311 SUBJECT: FUSELAGE - Frames and Bulkheads - Body Station (STA) 727 Bulkhead Lower Frame Web and Inner Chord - Inspection, Preventive Modification and Repair
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 This service bulletin is for the airplanes shown below. An equivalent change is on subsequent production airplanes. Refer to PRR 38275-185RS for data about this change.
Refer to Service Bulletin Index D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP 737-600/700 airplane line numbers 1-1179, which have lower frame part numbers 144A2615-1 and 144A2615-2 installed, excluding airplane variable number YA026, YA035, YA036 and YA075, which had a repair installed in the left side of STA 727 bulkhead lower frame before the original issue of this service bulletin.
-1 737-700 airplane variable number YA026, YA035 and YA036, which have lower frame part numbers 144A2615-1 and 144A2615-2 installed and that had a repair installed in the left side of STA 727 bulkhead lower frame before the original issue of this service bulletin.
-2 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 9 of 138
DESCRIPTIONCONFIGURATIONGROUP 737-700 airplane variable number YA075, which has lower frame part numbers 144A2615-1 and 144A2615-2 installed and that had a repair, which is equivalent to Repair 1 in this service bulletin, installed in the left side of STA 727 bulkhead lower frame before the original issue of this service bulletin.
-3 Airplane Models:
737-600, 737-700 GroupVariable Number 1YA001 - YA025 2YA026 1YA027 - YA034 2YA035 - YA036 1YA037 - YA074 3YA075 1YA076 - YA099 1YA101 - YA124 1YA201 - YA211 1YA231 - YA242 1YA251 - YA256 1YA271 - YA272 1YA291 1YA301 - YA302 1YA311 - YA314 1YA321 - YA323 1YA336 - YA344 1YA351 1YA356 - YA357 1YA366 - YA367 1YA501 - YA536 1YA541 - YA552 1YA571 - YA578 1YA601 - YA615 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 10 of 138 BOEING SERVICE BULLETIN 737-53A1325
ALERTALERT
GroupVariable Number 1YA621 - YA622 1YA626 - YA629 1YA635 - YA636 1YA645 - YA647 1YA656 - YA659 1YA671 - YA672 1YA681 - YA691 1YA701 - YA706 1YA721 - YA722 1YA731 - YA734 1YA751 - YA756 1YA801 - YA803 1YA809 1YA811 - YA814 1YA831 - YA834 1YA841 - YA856 1YA881 - YA882 1YA891 - YA892 1YA961 - YA968 1YB001 - YB006 1YB101 - YB116 1YB151 - YB153 1YB161 - YB162 1YB171 - YB172 1YB181 - YB183 1YB201 - YB207 1YB271 1YB276 1YB301 - YB307 1YB501 - YB502 1YB521 1YB551 1YE001 - YE020 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 11 of 138 BOEING SERVICE BULLETIN 737-53A1325
ALERTALERT
GroupVariable Number 1YE051 1YE101 - YE109 1YE151 - YE157 1YE171 - YE172 1YE201 - YE203 1YE301 - YE305
2. Spares Affected None.
B. Concurrent Requirements None.
C. Reason The inspections given in this service bulletin will detect cracks in the Body Station (STA) 727 bulkhead lower frame web and inner chord before they reach a critical length. The changes given in this service bulletin will decrease the occurrence of cracks at the STA 727 bulkhead lower frame web and inner chord. This area is a primary structural element (PSE). If the inspections given in this service bulletin are not accomplished undetected cracks could result in severed frames and induced skin cracks at these locations. This could lead to rapid decompression of the fuselage.
The STA 727 bulkhead lower frames have been determined to be structure that is susceptible to Widespread Fatigue Damage (WFD).
Boeing has received reports of cracking on four airplanes in the lower bulkhead frame as shown in the service history table below.
Service History - Model 737-600/-700 ReportFlight Cycles/Flighthours One crack extending 0.25 inches outboard from the fastener hole. (a)25,544/ 44,100 One crack extending 0.50 inches outboard from the fastener hole. (a)23,682/ 40,381 One crack extending 0.50 inch outboard from the fastener hole, and one crack extending inboard through the frame radius into the inner chord flange. (a) 25,616/ 44,061 One crack was found at a fastener in the STA 727 frame web at Left Buttock Line (LBL) 60. The crack measures 0.50 inch, extending inboard. (a) 25,435/43,543
(a) All cracks reported occur in the lower frame web and originates at the 5/16 Inch diameter fastener location adjacent to the inboard chord and common to the STA 727 bulkhead compression chord.
737-600/700 airplanes after line number 1179 have a different frame assembly installed in production that has a thicker web and chord in the areas prone to cracking.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 03, 2013 737-53A1325 12 of 138 BOEING SERVICE BULLETIN 737-53A1325