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 = '7282699837d8e208880bbf35406bbb3243e383a77fd72404ebaf6227387b758f' 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 = '7282699837d8e208880bbf35406bbb3243e383a77fd72404ebaf6227387b758f' 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 757 Service Bulletin ALERT Number: 757-52A0091 Original Issue: March 09, 2010 Revision 1: December 19, 2014 ATA System: 5232 SUBJECT: DOORS - Main Cargo Door - Cam Latch and Latch Pin Inspection and Modification 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 © 2010 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Unpublished Work.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 09, 2010 757-52A0091Revision 1: December 19, 2014 1 of 62
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 09, 2010 757-52A0091Revision 1: December 19, 2014 2 of 62 BOEING SERVICE BULLETIN 757-52A0091
ALERTALERT
BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION ........................................ 1 1 A. Effectivity ............................................... 1 1
1. Airplanes ............................................ 1 1
2. Spares Affected ........................................ 1 2 B. Concurrent Requirements ...................................... 1 2 C. Reason ................................................ 1 2 D. Description .............................................. 1 3 E. Compliance .............................................. 1 3 F. Approval ............................................... 2 4 G. Manpower .............................................. 2 5 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 6
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 2 6 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 ................................. 2 9
1. Kits/Parts ............................................ 2 9
2. Parts and Materials Supplied by the Operator ........................ 2 9
3. Parts Modified and Reidentified ................................ 2 9
4. Parts Removed and Not Replaced .............................. 3 0 D. Parts Necessary to Change Spares ................................. 3 0 E. Special Tooling - Price and Availability ............................... 3 0 F. Special Tooling Necessary to do this Service Bulletin ....................... 3 0
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 3 1 A. GENERAL INFORMATION ..................................... 3 1 B. WORK INSTRUCTIONS ....................................... 3 2 FIGURE 1: MAIN CARGO DOOR - CAM LATCHES AND LATCH PINS INSPECTION ......... 3 7 FIGURE 2: MAIN CARGO DOOR - LATCH PIN CROSS BOLT TORQUE ................ 4 0 FIGURE 3: MAIN CARGO DOOR - LATCH PIN EXTENSION MEASUREMENT ............ 4 2 FIGURE 4: MAIN CARGO DOOR - CAM LATCH 1 AND CAM LATCH 2 INSPECTION ........ 4 4 FIGURE 5: MAIN CARGO DOOR - LATCH PIN CROSS BOLT REPLACEMENT ........... 4 6 FIGURE 6: MAIN CARGO DOOR - CAM LATCH REPLACEMENT ................... 4 8 FIGURE 7: MAIN CARGO DOOR - LATCH PIN REPLACEMENT .................... 5 1 FIGURE 8: MAIN CARGO DOOR - CAM LATCH REMOVAL AND INSPECTION ........... 5 3 FIGURE 9: MAIN CARGO DOOR - CAM LATCHES, LATCH PINS AND LATCH PIN CROSS BOLTS INSPECTION .......................................... 5 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 09, 2010 757-52A0091Revision 1: December 19, 2014 3 of 62 BOEING SERVICE BULLETIN 757-52A0091
ALERTALERT
FIGURE 10: MAIN CARGO DOOR - CAM LATCH AND LATCH PIN RIGGING ............. 5 8 FIGURE 11: MAIN CARGO DOOR - MAIN CARGO DOOR EDGE FLUSHNESS MEASUREMENT . . 61 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 09, 2010 757-52A0091Revision 1: December 19, 2014 4 of 62 BOEING SERVICE BULLETIN 757-52A0091
ALERTALERT
Commercial Airplanes 757 Service Bulletin ALERT Revision Transmittal SheetNumber: 757-52A0091Original Issue: March 09, 2010 Revision 1: December 19, 2014 ATA System: 5232 SUBJECT: DOORS - Main Cargo Door - Cam Latch and Latch Pin Inspection and Modification This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2011-NM-163-AD, is related to this service bulletin.
No more work is necessary on the airplane(s) changed or inspected in accordance with the original issue of this service bulletin.
REASON FOR REVISION This revision is sent to clarify the requirements of the compliance tables.
These sections were changed:
1. Summary
a. Background:
(1) Background statement revised and new service history information was added.
(2) Summary Evaluation Table added.
b. Action - Changed to agree with work instructions.
c. Compliance - NPRM statement added.
2. Planning Information
a. Reason - Added the reason for Revision 1 is sent to statement.
b. Description - Changed to agree with work instructions.
c. Compliance:
(1) NPRM statement added.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 09, 2010 757-52A0091Revision 1: December 19, 2014 5 of 62
(2) Compliance Tables 1 and 2 revised to clarify inspections, conditions and actions.
3. Accomplishment Instructions
a. General Information - Notes numbering has been changed and new notes added.
b. Work Instructions - Revised for clarification.
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 09, 2010Original Issue:
December 19, 2014Revision 1:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 09, 2010 757-52A0091Revision 1: December 19, 2014 6 of 62 BOEING SERVICE BULLETIN 757-52A0091
ALERTALERT
Commercial Airplanes 757 Service Bulletin ALERT SummaryNumber: 757-52A0091Original Issue: March 09, 2010 Revision 1: December 19, 2014 ATA System: 5232 SUBJECT: DOORS - Main Cargo Door - Cam Latch and Latch Pin Inspection 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 Accomplishment of the inspections in this service bulletin will make sure the Main Cargo Door (MCD) cam latches are inspected for damage and the latch pins are inspected for damage and migration. The inspections are necessary in order to find and replace damaged cam latches, latch pins and latch pin cross bolts. If not replaced, damaged cam latches, latch pins and latch pin cross bolts could lead to a failure of the cam latches and may result in a possible rapid decompression and potential separation of the cargo door from the airplane.
Boeing has received one report from one operator that the MCD forward most cam latch on the forward center cam latch pair (cam latch number 3) broke during flight. The airplane that reported the broken cam latch had 20,000 flight hours and 9,500 flight cycles when the cam latch broke. The crew heard a loud noise coming from the MCD shortly after cruise. Upon landing, an inspection was performed and a cam latch was found broken.
The broken cam latch mating latch pin was also found to have significant wear as evidenced by the loss of the plating on the surface that is normally in contact with the cam. The latch pin was also deformed approximately
0.05 inch in the area of the wear surface.
The cause of the broken cam latch has been determined to be from a poorly rigged MCD. Although rigged per the original Aircraft Maintenance Manual (AMM) procedures, significant variation was allowed in the rigging dimensions. This variation can cause some of the latch pin/cam latch locations to have a significant preload placed on them during engagement and rotation of the cam latches during latching and unlatching operations.
This preload is believed to have imparted a torque on the latch pin from the cam latch rotation during latching and unlatching operations. The torque transmitted to the latch pin is then believed to have caused the latch pin cross bolt to fail in shear.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 09, 2010 757-52A0091Revision 1: December 19, 2014 7 of 62
If the latch pin cross bolt fails, the latch pin could migrate either towards the cam latch or away from the cam latch. Latch pin migration towards the cam latch can cause significant interference with the mating cam latch leading to cam latch damage. In this case, the latch pin migrated into the cam latch and caused damage to the cam latch. The crack initiated at the damage site caused by the latch pin and then led to the cam latch breaking.
Latch pin migration away from the cam latch could cause disengagement from the cam latch, resulting in no load transfer between the cam latch and the mating latch pin and may not be noticed before critical conditions are exceeded in adjacent cam latches or latch pins.
Accomplishment of the work given in this service bulletin will make sure the cam latches, latch pins and latch pin cross bolt are inspected and repaired or replaced as required. The MCD rig will be verified to the Service Bulletin requirements and if necessary, the MCD will be re-rigged to the updated AMM requirements.
Since the original report, there have been two additional reports of sheared latch pin cross bolts.
Boeing Service Related Problem (SRP) 757-SRP-52-0088 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 ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedYesPublications 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 Get access to the MCD. Do a general visual inspection of the cam latches, latch pins and latch pin cross bolt.
Torque the cross bolts in the latch pins. Measure the extension of the latch pins. Replace all alloy steel cross bolts through the latch pins with Corrosion Resistant Steel (CRES) cross bolts. Check for lip deformation on all cam latches. Do a High Frequency Eddy Current (HFEC) or magnetic particle inspection of cam latch 1 and cam latch 2 for cracks. Replace any cracked or broken parts. Check the rig of the MCD to the requirements of the Service Bulletin and if necessary, the MCD will be re-rigged to the latest AMM requirements. Do repetitive general visual and detailed inspections of the cam latches and latch pins after the rig is verified or adjusted. Do repetitive HFEC or magnetic particle inspections of cam latch 1 and cam latch 2 for cracks after the rig is verified or adjusted.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 09, 2010 757-52A0091Revision 1: December 19, 2014 8 of 62 BOEING SERVICE BULLETIN 757-52A0091
ALERTALERT
EFFECTIVITY 757-200CB, 757-200PF and 757-200 Special Freighter delivered under a Boeing Supplemental Type Certificate (STC) Airplanes. Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2011-NM-163-AD, is related to this service bulletin.
Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspections and modifications given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Operator Supplied Parts/Materials.
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 09, 2010 757-52A0091Revision 1: December 19, 2014 9 of 62 BOEING SERVICE BULLETIN 757-52A0091
ALERTALERT
BOEING SERVICE BULLETIN 757-52A0091
ALERT ALERT
MAIN CARGO DOORWAY
LOWER SILL
LATCH PIN
- DO A GENERAL VISUAL INSPECTION OF THE CAM LATCHES, LATCH PINS, AND LATCH PIN CROSS BOLTS.
TORQUE THE LATCH PIN CROSS BOLTS IN THE LATCH PINS.
MEASURE THE EXTENSION OF THE LATCH PINS.
• REPLACE ALL THE ALLOY STEEL CROSS BOLTS THROUGH THE
LATCH PINS WITH CRES LATCH PIN CROSS BOLTS CHECK FOR LIP DEFORMATION ON ALL CAM LATCHES.
DO A HFEC OR MAGNETIC PARTICLE INSPECTION OF CAM LATCH 1 AND CAM LATCH 2 FOR CRACKS.
• CHECK THE RIG OF THE MCD REPLACE DAMAGED LATCH PINS AND CAM LATCHES.
- RIG THE MCD IF NECESSARY
• DO REPETITIVE POST-RIG CHECK INSPECTIONS.
CAM LATCH 1672966 Original Issue: March 09, 2010 Revision 1: December 19, 2014 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 757-52A0091 Work - See page 1 for details. 10 of 62
Commercial Airplanes 757 Service Bulletin ALERT Number: 757-52A0091 Original Issue: March 09, 2010 Revision 1: December 19, 2014 ATA System: 5232 SUBJECT: DOORS - Main Cargo Door - Cam Latch and Latch Pin Inspection 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.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes Refer to Service Bulletin Index Document D624N001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is for the airplanes shown below.
DESCRIPTIONCONFIGURATIONGROUP 757-200PF, 757-200CB and 757-200 Special Freighter delivered under a Boeing Supplemental Type Certificate (STC) Airplanes -1 Airplane Models:
757-200, 757-200CB, 757-200PF GroupVariable Number 1NA201 - NA204 1NA206 - NA213 1NA215 - NA236 1NC901 - NC951 1NC971 1NC973 - NC974 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 09, 2010 757-52A0091Revision 1: December 19, 2014 11 of 62
GroupVariable Number 1ND895 1NS601 - NS616 1NT001 - NT009
2. Spares Affected None.
B. Concurrent Requirements None.
C. Reason Accomplishment of the inspections in this service bulletin will make sure the Main Cargo Door (MCD) cam latches are inspected for damage and the latch pins are inspected for damage and migration. The inspections are necessary in order to find and replace damaged cam latches, latch pins and latch pin cross bolts. If not replaced, damaged cam latches, latch pins and latch pin cross bolts could lead to a failure of the cam latches and may result in a possible rapid decompression and potential separation of the cargo door from the airplane.
Boeing has received one report from one operator that the MCD forward most cam latch on the forward center cam latch pair (cam latch number 3) broke during flight. The airplane that reported the broken cam latch had 20,000 flight hours and 9,500 flight cycles when the cam latch broke. The crew heard a loud noise coming from the MCD shortly after cruise. Upon landing, an inspection was performed and a cam latch was found broken. The broken cam latch mating latch pin was also found to have significant wear as evidenced by the loss of the plating on the surface that is normally in contact with the cam. The latch pin was also deformed approximately 0.05 inch in the area of the wear surface.
The cause of the broken cam latch has been determined to be from a poorly rigged MCD. Although rigged per the original Aircraft Maintenance Manual (AMM) procedures, significant variation was allowed in the rigging dimensions. This variation can cause some of the latch pin/cam latch locations to have a significant preload placed on them during engagement and rotation of the cam latches during latching and unlatching operations. This preload is believed to have imparted a torque on the latch pin from the cam latch rotation during latching and unlatching operations. The torque transmitted to the latch pin is then believed to have caused the latch pin cross bolt to fail in shear.
If the latch pin cross bolt fails, the latch pin could migrate either towards the cam latch or away from the cam latch. Latch pin migration towards the cam latch can cause significant interference with the mating cam latch leading to cam latch damage. In this case, the latch pin migrated into the cam latch and caused damage to the cam latch. The crack initiated at the damage site caused by the latch pin and then led to the cam latch breaking. Latch pin migration away from the cam latch could cause disengagement from the cam latch, resulting in no load transfer between the cam latch and the mating latch pin and may not be noticed before critical conditions are exceeded in adjacent cam latches or latch pins.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 09, 2010 757-52A0091Revision 1: December 19, 2014 12 of 62 BOEING SERVICE BULLETIN 757-52A0091