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Commercial Airplanes 777 Service Bulletin ALERT Number: 777-32A0103 Original Issue: September 11, 2015 Revision 1: December 10, 2015 ATA System: 3211 SUBJECT: LANDING GEAR - Main Landing Gear - Aft Trunnion Pin Inspection and Replacement 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 © 2015 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Unpublished Work.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: September 11, 2015 777-32A0103Revision 1: December 10, 2015 1 of 51
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 2 of 51 BOEING SERVICE BULLETIN 777-32A0103
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BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION11
A. Effectivity11
1. Airplanes11
2. Spares Affected17
B. Concurrent Requirements17
C. Reason17
D. Description18
E. Compliance18
F. Approval19
G. Manpower20
H. Weight and Balance Changes21
I. Electrical Load Data21
J. References21
1. Existing Data:21
2. Data Supplied with this Service Bulletin:21
3. Installation Drawings Used in the Preparation of this Service Bulletin:21
K. Publications Affected21
L. Interchangeability and Intermixability of Parts21
M. Software Accomplishment Summary22
2. MATERIAL INFORMATION23
A. Material - Price and Availability23
B. Industry Support Information24
C. Parts Necessary for Each Airplane25
1. Kits/Parts25
2. Parts and Materials Supplied by the Operator25
3. Parts Modified and Reidentified25
4. Parts Removed and Not Replaced25
D. Parts Necessary to Change Spares25
E. Special Tooling - Price and Availability26
F. Special Tooling Necessary to do this Service Bulletin26
3. ACCOMPLISHMENT INSTRUCTIONS27
A. GENERAL INFORMATION27
B. WORK INSTRUCTIONS28
FIGURE 1: LEFT MAIN LANDING GEAR AFT TRUNNION PIN - DETAILED INSPECTION32
FIGURE 2: RIGHT MAIN LANDING GEAR AFT TRUNNION PIN - DETAILED INSPECTION34
FIGURE 3: LEFT MAIN LANDING GEAR AFT TRUNNION PIN - REPLACEMENT [Group 1]36
FIGURE 4: RIGHT MAIN LANDING GEAR AFT TRUNNION PIN - REPLACEMENT [Group 1]39
FIGURE 5: LEFT MAIN LANDING GEAR AFT TRUNNION PIN - REPLACEMENT [Group 2]42
FIGURE 6: RIGHT MAIN LANDING GEAR AFT TRUNNION PIN - REPLACEMENT [Group 2]45
APPENDIX A: LOGIC DIAGRAM48
APPENDIX B: ACCEPTABLE AFT TRUNNION PIN ASSEMBLY PART NUMBERS50
APPENDIX C: PART DEMAND INTENT SURVEY51
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 3 of 51 BOEING SERVICE BULLETIN 777-32A0103
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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 4 of 51 BOEING SERVICE BULLETIN 777-32A0103
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Commercial Airplanes 777 Service Bulletin ALERT Revision Transmittal SheetNumber: 777-32A0103Original Issue: September 11, 2015 Revision 1: December 10, 2015 ATA System: 3211 SUBJECT: LANDING GEAR - Main Landing Gear - Aft Trunnion Pin Inspection and Replacement This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION 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.
Effects of this Revision on airplanes on which the Original Issue was previously done:
None.
REASON FOR REVISION This revision is sent to remove airplane line numbers 1331 through 1343 from the effectivity. These airplanes were or will be delivered after the Original Issue date of this service bulletin (SB). The SB is revised to reflect type design at the time of delivery. However, it is understood that the FAA Airworthiness Directive related to this SB will be applicable to all Boeing 777 airplanes due to concerns about rotable parts.
These sections were changed:
1. Paragraph 1.A.1., Airplanes: Removed line numbers 1331 through 1343.
2. Paragraph 1.K.1, Publications: Removed a publication reference.
3. Paragraph 2.A., Material - Price and Availability: Revised table.
4. Paragraph 2.B., Industry Support Information: Revised warranty statement.
The data given in Information Notice 777-32A0103 IN 01 is included in this revision.
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.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 5 of 51
REVISION HISTORY September 11, 2015Original Issue:
December 10, 2015Revision 1:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 6 of 51 BOEING SERVICE BULLETIN 777-32A0103
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Commercial Airplanes 777 Service Bulletin ALERT SummaryNumber: 777-32A0103Original Issue: September 11, 2015 Revision 1: December 10, 2015 ATA System: 3211 SUBJECT: LANDING GEAR - Main Landing Gear - Aft Trunnion Pin Inspection and Replacement
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 This service bulletin gives instructions to perform a records check or Detailed Inspection of the main landing gear (MLG) for aft trunnion pins with serial numbers that begin with "EGL" or "MAL", and to replace them if found. MLG aft trunnion pins with these serial numbers could have a manufacturing defect that can cause them to fracture. If this service bulletin is not done, fracture of a MLG aft trunnion pin could result in the collapse of a MLG, which could result in loss of control of the airplane during landing.
After a landing where pilots were required to input corrections due to airplane yaw and roll to the right, the MLG aft trunnion pin was found to be fractured. Other damage included minor damage to the gear beam, trunnion door panel and a broken tie-rod. Materials analysis of the fractured pin showed that the crack started from an area of heat damage introduced during manufacturing. A review of gear overhaul records indicated that other pins manufactured by the same supplier had similar signs of heat damage, suspected to have been caused by abusive chrome grinding. This evidence suggests that the heat damage occurred during manufacturing, so it is possible that other airplanes can have aft trunnion pins with similar heat damage.
Boeing Multi-Operator Message (MOM) MOM-MOM-15-0303-01B is related to this service bulletin. Operators that have identified the serial number in order to respond to the questions asked in this MOM do not need to do PART 1 of the work instructions.
Boeing Service Related Problem (SRP) 777-SRP-32-0202 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 777 FTD 32-14005 is related to this service bulletin.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 7 of 51
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 AffectedYesSpares 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/PartsYesKits/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 Do a records check or Detailed Inspection of the Main Landing Gear Aft Trunnion Pins to identify the serial number and to look for a "BASE METAL INSPECTED" marking. If the serial number begins with "EGL" or "MAL", and a "BASE METAL INSPECTED" marking is not found, replace the aft trunnion pin. If the serial number does not begin with "EGL" or "MAL", or a "BASE METAL INSPECTED" marking is found, no more work is necessary.
EFFECTIVITY 777-200, -200LR, -300, -300ER, and 777F Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s).
Refer to Paragraph 1.A.2., Spares Affected for the list of affected components.
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 777 airplanes in warranty as of November 17, 2014. Additionally, Boeing has elected to extend a business consideration for out-of-warranty airplanes with line numbers 1 through 504 and line number 784 (Business Consideration Airplanes). Please refer to Paragraph 2.B., Industry Support Information.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 8 of 51 BOEING SERVICE BULLETIN 777-32A0103
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MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
Operators are encouraged to complete the survey provided in APPENDIX C of this service bulletin to help Boeing predict the quantity and timing of the Boeing Supplied Kits/Parts.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 9 of 51 BOEING SERVICE BULLETIN 777-32A0103
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BOEING SERVICE BULLETIN 777-32A0103
ALERT ALERT
DO A RECORDS CHECK OR DETAILED INSPECTION
OF EACH MAIN LANDING GEAR AFT TRUNNION PIN IF NECESSARY, REPI _ACE AFT TRUNNION PIN
MAIN LANDING GEAR 2421615 Original Issue: September 11, 2015 Revision 1: December 10, 2015 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 777-32A0103 Work - See page 1 for details. 10 of 51
Commercial Airplanes 777 Service Bulletin ALERT Number: 777-32A0103 Original Issue: September 11, 2015 Revision 1: December 10, 2015 ATA System: 3211 SUBJECT: LANDING GEAR - Main Landing Gear - Aft Trunnion Pin Inspection and Replacement
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 D624W001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is applicable to 777 Airplanes, line numbers 1-1330 in 2 Groups. The Variable Numbers and Group Information for the applicable airplanes is given below.
DESCRIPTIONCONFIGURATIONGROUP 777-200 and -300 Airplanes-1 777-200LR, -300ER, and 777F Airplanes-2 Airplane Models:
777-200, 777-200LR, 777-300, 777-300ER, 777F GroupVariable Number 1WA001 - WA017 1WA076 - WA080 1WA086 - WA093 1WA101 - WA104 1WA116 - WA119 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 11 of 51
GroupVariable Number 1WA131 - WA137 1WA171 - WA175 1WA196 - WA198 1WA206 - WA212 1WA221 - WA223 1WA231 - WA232 1WA241 - WA250 1WA261 - WA266 1WA281 - WA283 1WA301 - WA304 1WB001 - WB021 1WB031 - WB046 1WB051 - WB088 1WB101 - WB106 1WB121 - WB125 1WB131 - WB148 1WB151 - WB155 1WB161 - WB177 1WB181 - WB194 1WB201 - WB215 1WB231 - WB247 1WB271 - WB273 1WB276 - WB286 1WB291 - WB302 1WB306 - WB307 1WB311 - WB337 1WB341 - WB342 1WB366 - WB368 1WB371 - WB388 1WB406 1WB411 - WB413 1WB416 - WB439 1WB446 - WB453 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 11, 2015 777-32A0103Revision 1: December 10, 2015 12 of 51 BOEING SERVICE BULLETIN 777-32A0103