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 = 'c272ecc3dcf88322d06d3d02da767d5351c9655867f9a8580246d24657fc077a' 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 = 'c272ecc3dcf88322d06d3d02da767d5351c9655867f9a8580246d24657fc077a' 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: 737-52A1079 Original Issue: December 16, 1983 Revision 7: December 17, 2010 ATA System: 5231 SUBJECT: DOORS - Aft Cargo - Frame and Beam Inspection, Repair and Modification Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 1989 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work.
This document includes proprietary information owned by The Boeing Company and/or one or more third parties.
Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.
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, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the Boeing livery 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.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 1 of 103
4.0
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 2 of 103 BOEING SERVICE BULLETIN 737-52A1079
ALERTALERT
BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary9
1. PLANNING INFORMATION ........................................ 1 3 A. Effectivity ............................................... 1 3
1. Airplanes ............................................ 1 3
2. Spares Affected ........................................ 2 2 B. Concurrent Requirements ...................................... 2 2 C. Reason ................................................ 2 2 D. Description .............................................. 2 4 E. Compliance .............................................. 2 7 F. Approval ............................................... 3 9 G. Manpower .............................................. 4 0 H. Weight and Balance Changes .................................... 4 1 I. Electrical Load Data ......................................... 4 1 J. References .............................................. 4 1
1. Existing Data: ......................................... 4 1
2. Data supplied with this Service Bulletin: ........................... 4 2
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 4 2
4. Process Data: ......................................... 4 2 K. Publications Affected ........................................ 4 3 L. Interchangeability and Intermixability of Parts ........................... 4 3
2. MATERIAL INFORMATION ........................................ 4 5 A. Material - Price and Availability ................................... 4 5 B. Industry Support Information .................................... 4 5 C. Parts Necessary For Each Airplane ................................. 4 6
1. Kits/Parts: ........................................... 4 6
2. Parts and Materials Supplied by the Operator: ........................ 5 2
3. Parts Modified and Reidentified: ............................... 5 4
4. Parts Removed and Not Replaced: .............................. 5 4 D. Parts Necessary to Change Spares ................................. 5 4 E. Special Tooling - Price and Availability ............................... 5 4 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: AFT CARGO DOOR INSPECTION .............................. 6 6 FIGURE 2: CORNER INSPECTION AND REWORK ........................... 7 0 FIGURE 3: LOWER BEAM REPAIR - FORWARD END ......................... 7 2 FIGURE 4: REPAIR PARTS - LOWER BEAM FORWARD END ..................... 7 7 FIGURE 5: LOWER BEAM REPAIR - AFT END ............................. 8 2 FIGURE 6: REPAIR PARTS - LOWER BEAM AFT END ......................... 8 7 FIGURE 7: AFT CARGO DOOR - LOWER CROSS BEAM - FORWARD END - SUPPLEMENTAL STRUCTURAL INSPECTION ................................. 8 9 FIGURE 8: AFT CARGO DOOR - LOWER CROSS BEAM - AFT END - SUPPLEMENTAL STRUCTURAL INSPECTION .......................................... 9 2
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 3 of 103 BOEING SERVICE BULLETIN 737-52A1079
ALERTALERT
FIGURE 9: AFT CARGO DOOR - UPPER CROSS BEAM - FORWARD END - SUPPLEMENTAL STRUCTURAL INSPECTION ................................. 9 5 FIGURE 10: AFT CARGO DOOR - UPPER CROSS BEAM - AFT END - SUPPLEMENTAL STRUCTURAL INSPECTION .......................................... 9 8 FIGURE 11: AFT CARGO DOOR - LOWER CROSS BEAM - FORWARD END - SUPPLEMENTAL
STRUCTURAL INSPECTION FOR AIRPLANES WITH LOWER BEAM OUTER 'T' CHORD REPAIR INSTALLED ON THE FORWARD END ...................... 1 0 1
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 4 of 103 BOEING SERVICE BULLETIN 737-52A1079
ALERTALERT
Commercial Airplanes 737 Service Bulletin ALERT Revision Transmittal SheetNumber: 737-52A1079Original Issue: December 16, 1983 Revision 7: December 17, 2010 ATA System: 5231 SUBJECT: DOORS - Aft Cargo - Frame and Beam Inspection, Repair and Modification This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION More work is necessary on airplanes that have not accomplished the repair or preventive modification in accordance with previous releases of this service bulletin. Do an ultrasonic inspection for cracks in the upper and lower corner frames and a HFEC inspection for cracks in the upper and lower cross beams at the revised time specified in Paragraph 1.E., Compliance.
More work is necessary on airplanes that have repair angles 65C25180-9, -43, -10, -11 or -12 installed in accordance with previous issues of this service bulletin. Do the work in Paragraph 3.B., Work Instructions, Part V - Corner Inspection and Rework in accordance with Revision 7 of this service bulletin at the revised time specified in Paragraph 1.E., Compliance.
More work is necessary on airplanes that have accomplished the repair or preventive modification of the upper or lower cross beams in accordance with previous releases of this service bulletin. Do supplemental structural inspections of the cross beams at the times specified in Paragraph 1.E., Compliance. These supplemental structural inspections provide compliance with 14 CFR 26.43 (c).
Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2000-06-13 R1 supersedes Airworthiness Directive (AD) 98-25-06.
No new airplanes have been added or removed from the effectivity of this bulletin.
REASON FOR REVISION This revision is sent to:
— Remove the option for repeat inspections and add a High Frequency Eddy Current (HFEC) inspection for cracks in the beam.
— Remove the option to repair the upper edge frame using a Structural Repair Manual (SRM) procedure.
— Replace the HFEC inspection of the frames with an ultrasonic inspection.
— Inform operators that the corner reinforcing angles given in previous releases of this service bulletin have been superseded by corner reinforcing angles with an increased edge margin.
— Inform operators that this revision provides supplemental structural inspections in compliance with 14 CFR
26.43 (c).
— Change the Lower Beam Outer 'T' Chord Repair on the forward end of the lower beam to include a joggle of the replacement 'T' Chord.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 5 of 103
— Change the heat treatment of the replacement 'T' Chord A to 2024-0.
— Instruct operators to identify the aft cargo door part number which is currently installed on each airplane in accordance with the original issue of Boeing Service Bulletin 737-52A1153 before further work is done.
— Instruct operators to also accomplish all applicable actions in accordance with the original issue of Service Bulletin 737-52-1154 at the time specified in Paragraph 1.E., Compliance, if any cracks are found.
These sections were changed:
1. The Summary Background and Action sections are updated.
2. Summary illustration - Reinforcement angles are added to the lower corners of the aft cargo door.
3. Paragraph 1.C., Reason is updated.
4. Paragraph 1.D., Description is updated.
5. Paragraph 1.E., Compliance - The compliance information is changed.
6. Paragraph 1.F, Approval - An Alternative Method of Compliance (AMOC) statement is added. Also, supplemental structural inspection information is added.
7. Paragraph 1.G., Manpower - The manpower information is updated.
8. Paragraph 1.H., Weight and Balance Changes - The SRM repair is removed from the table.
9. Paragraph 1.J., References - Non Destructive Test (NDT) Manual references, reference service bulletin numbers and Federal Aviation Administration (FAA) Airworthiness Directives (AD) are added. Supplemental Structural Inspection Document numbers are also added. SRM 51-40-3 reference is removed.
10. Paragraph 1.K., Publications Affected - A statement for Damage Tolerance Based Structural Inspections is added.
11. Paragraph 2.C.1., Kits/Parts - Replacement parts are added to one kit table.
12. Paragraph 2.C.2., Parts and Materials Supplied by the Operator - Fasteners are added to the table for the repair parts.
13. Paragraph 3.A., General Information - Note added, reference the use of the words "refer to" and "in accordance with".
14. Paragraph 3.B., Work Instructions - Supplemental Structural Inspections are added. Also, the option to repair the upper edge frame using an SRM procedure is removed.
15. Figures 1 through 5 are updated.
16. Figures 7 through 11 are added to provide Supplemental Structural Inspections.
Paragraph 1.A., Effectivity, shows changes of airplane operators. Each operator should examine the Effectivity paragraph for changes.
Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location of important changes.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 6 of 103 BOEING SERVICE BULLETIN 737-52A1079
ALERTALERT
Pages with no vertical lines have no important changes.
REVISION HISTORY December 16, 1983Original Issue:
December 15, 1988Revision 1:
July 20, 1989Revision 2:
May 17, 1990Revision 3:
February 21, 1991Revision 4:
May 16, 1996Revision 5:
November 18, 1999Revision 6:
December 17, 2010Revision 7:
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 7 of 103 BOEING SERVICE BULLETIN 737-52A1079
ALERTALERT
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 8 of 103 BOEING SERVICE BULLETIN 737-52A1079
ALERTALERT
BLANK PAGE
Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-52A1079Original Issue: December 16, 1983 Revision 7: December 17, 2010 ATA System: 5231 SUBJECT: DOORS - Aft Cargo - Frame and Beam Inspection, Repair and Modification
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 Based on a structural review of the 737 airplane, incorporation of the modification in accordance with this service bulletin is recommended on aging airplanes.
As of 1996, several operators had reported cracks 0.75 to 20 inches long in the forward and aft lower corner of the aft cargo door frames. The airplanes had 10,100 to 38,000 flight hours and 14,000 to 54,000 flight cycles.
In addition, some of the doors had a cracked web in the beam common to the forward lower stop fitting, approximately 3 inches aft of the fitting. In some of the cases, the frame and beam cracks were discovered after the airplane had experienced pressurization problems. Cracking is caused by fatigue as a result of cabin pressurization cycles.
Since 1996, there have been additional reports of cracked frames and cracked beam webs. One airplane with 86,400 hours and 35,400 flight cycles experienced a rapid decompression caused by an approximately 12 inch long crack in the aft lower frame corner. The lower beam web and outer 'T' chord were also cracked.
Since 1996, there have also been at least two reports of cracking in the lower beam outer "T" chord. One airplane had only the outer "T" chord cracked and had about 63,800 flight hours and 66,500 flight cycles. On the other airplane, the frame and "T" chord were cracked all the way through.
The inspection, repair and preventive modification of cross beam D on the aft cargo door is the subject of the original issue of Boeing Service Bulletin 737-52-1154 .
The Federal Aviation Administration (FAA) has issued an Airworthiness Directive (AD) which requires incorporation of Revision 5 or 6 of this bulletin.
Boeing Service Related Problem (SRP) 737-SRP-52-0077 is related to this service bulletin.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 9 of 103
ACTION Identify the aft cargo door assembly part number which is currently installed on each airplane in accordance with Boeing Service Bulletin 737-52A1153 , Original Issue, Paragraph 3.B.1. If the door is found to be from an airplane in the line number range greater than 873, accomplish all applicable actions in accordance with Service Bulletin 737-52A1153 , Original Issue.
For Groups 1, 2 and 3 airplane doors: If an airplane is found to have a door configuration that was delivered between line numbers 6 and 873, inclusive, do the following: Do an inspection for cracks in the forward and aft frames at the upper and lower corners. Use visual and ultrasonic inspection techniques to look for cracking in the radius of the frames. Also, do a HFEC inspection for cracking in the lower and upper beam web and outer "T" chord. For airplanes that have previously installed reinforcement angle 65C25180-9, -43, -10, -11 or -12, do an inspection for adequate edge margin and cracks.
For airplanes that have previously installed repairs or modifications to the upper or lower cross beam, do supplemental structural inspections at the times given in Paragraph 1.E., Compliance . These supplemental structural inspections provide compliance with 14 CFR 26.43 (c).
The modification requires installation of a steel reinforcement angle in each corner of the door and the installation of a web doubler on the upper and lower beams.
In addition, if any cracks are found, accomplish all applicable actions in accordance with the original issue of Service Bulletin 737-52-1154 at the time specified in Paragraph 1.E., Compliance .
EFFECTIVITY 737-200, -200C, -300, and -400 series airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
COMPLIANCE See Paragraph 1.E., Compliance.
Federal Aviation Administration (FAA) Airworthiness Directive AD 90-06-02, AD 98-25-06, AD 98-11-04 R1, AD 2000-06-13 R1, AD 2008-08-23 and AD 2008-09-13 are related to this service bulletin.
INDUSTRY SUPPORT INFORMATION This service bulletin was first released before October of 1994. Thus industry support for affected airplanes depends upon whether you ever filed a warranty claim with Boeing on this service bulletin.
MANPOWER See Paragraph 1.G., Manpower.
MATERIAL INFORMATION Refer to Paragraph 2.A., Material - Price and Availability.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 10 of 103 BOEING SERVICE BULLETIN 737-52A1079
ALERTALERT
BOEING SERVICE BULLETIN 737-52A1079
ALERT ALERT STA STA 1016 907 STA 787 logoooopo
REINFORCEMENT ANGLES (4 PLACES)
FWD INBD
TYPICAL FRAME CRACK
TYPICAL'T'
CHORD CRACK TYPICAL WEB CRACK BEAM WEB
STOP FITTING BEAM
OUTER 'T' CHORD
FRAME HOLID INBD
DOOR FRAME
TYPICAL FRAME CRACK 752670
VIEW A-A Original Issue: December 16, 1983 Revision 7: December 17, 2010 737-52A1079
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 11 of 103
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: December 16, 1983 737-52A1079Revision 7: December 17, 2010 12 of 103 BOEING SERVICE BULLETIN 737-52A1079