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Commercial Airplanes 777 Service Bulletin ALERT Number: 777-32A0082 Original Issue: December 09, 2010 ATA System: 3211 SUBJECT: LANDING GEAR - Main Landing Gear - Shock Strut and Center Axle Inner Cylinder Pivot Joint Lubrication and Inspection 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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.
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Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 1 4 B. Concurrent Requirements ...................................... 1 4 C. Reason ................................................ 1 4 D. Description .............................................. 1 4 E. Compliance .............................................. 1 5 F. Approval ............................................... 2 1 G. Manpower .............................................. 2 1 H. Weight and Balance Changes .................................... 2 2 I. Electrical Load Data ......................................... 2 2 J. References .............................................. 2 2
1. Existing Data .......................................... 2 2
2. Data supplied with this Service Bulletin ............................ 2 3
3. Installation Drawings Used in the Preparation of this Service Bulletin ............ 2 3 K. Publications Affected ........................................ 2 3 L. Interchangeability and Intermixability of Parts ........................... 2 4
2. MATERIAL INFORMATION ........................................ 2 5 A. Material - Price and Availability ................................... 2 5 B. Industry Support Information .................................... 2 5 C. Parts Necessary For Each Airplane ................................. 2 5
1. Kits/Parts ............................................ 2 5
2. Parts and Materials Supplied by the Operator ........................ 2 5
3. Parts Modified and Reidentified ................................ 2 6
4. Parts Removed and Not Replaced .............................. 2 6 D. Parts Necessary to Change Spares ................................. 2 6 E. Special Tooling - Price and Availability ............................... 2 6 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 7
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 9 A. GENERAL INFORMATION ..................................... 2 9 B. WORK INSTRUCTIONS ....................................... 2 9 FIGURE 1: LEFT MLG CENTER AXLE INSPECTION .......................... 3 3 FIGURE 2: RIGHT MLG CENTER AXLE INSPECTION ......................... 3 5 FIGURE 3: LEFT MLG INNER CYLINDER BUSHING INSPECTION .................. 3 7 FIGURE 4: RIGHT MLG INNER CYLINDER BUSHING INSPECTION .................. 4 0 FIGURE 5: LEFT MLG INNER CYLINDER LUG BORE INSPECTION .................. 4 3 FIGURE 6: RIGHT MLG INNER CYLINDER LUG BORE INSPECTION ................. 4 6 FIGURE 7: LEFT MLG INNER CYLINDER LUG BORE REPAIR AND BUSHING REPLACEMENT . . 49 FIGURE 8: RIGHT MLG INNER CYLINDER LUG BORE REPAIR AND BUSHING REPLACEMENT . 55 APPENDIX A: CENTER AXLE ASSEMBLY AND INNER CYLINDER ASSEMBLY REPLACEMENT INTERCHANGEABILITY BASED ON AIRPLANE MINOR MODEL ............. 6 1
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Commercial Airplanes 777 Service Bulletin ALERT SummaryNumber: 777-32A0082Original Issue: December 09, 2010 ATA System: 3211 SUBJECT: LANDING GEAR - Main Landing Gear - Shock Strut and Center Axle Inner Cylinder Pivot Joint Lubrication and Inspection
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 this service bulletin will detect and prevent heat damage and possible cracks in the main landing gear (MLG) center axle and shock strut inner cylinder lugs (pivot joint) on 777 airplanes. The airplanes are subject to increased heat buildup in the MLG pivot joint which can cause cracks in the pivot joint components.
The cracks could lead to fracture of the center axle or inner cylinder lugs. Fracture of the center axle or inner cylinder lugs can result in the collapse of a MLG.
During MLG overhaul, 28 center axles have been found with cracks at the inner cylinder/truck beam pivot joint location. There have been no reports of a center axle fracture. Heat damage and cracks were found at the pivot joint location which is caused by the truck pitching motion during normal airplane operations. Cracks were found in areas common to the inner cylinder pivot bushings where heat damage had occurred.
This service bulletin provides the instructions for increased lubrication, inspection and repair of the MLG pivot joint components. Increased lubrication of the MLG pivot joint components will prevent heat damage which can lead to cracks and/or fracture of the pivot joint components.
Boeing Service Related Problem (SRP) 777-SRP-32-0159 is related to this service bulletin.
Boeing Service Letter (SL) 777-SL-32-059 is related to this service bulletin.
The Work Instructions of this service bulletin are equivalent to the Work Instructions of Boeing Service Bulletin (SB) 777-32-0080, which is related to this service bulletin.
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ACTION Get access to the left and right MLG wheel wells. Lubricate the pivot joint of both MLGs and repeat the lubrication.
Remove the landing gear center axles of both MLGs. Do a detailed, magnetic particle and, if necessary, nital etch inspection of the MLG pivot joints, including the center axle, inner cylinder bushings and inner cylinder lug bores. If no damage is found, repeat the inspection. If damage is found, repair or replace the damaged parts and repeat the inspection.
EFFECTIVITY 777-200, -300, -200LR, -300ER and 777F 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 not available for the inspection and/or repair procedures given in this service bulletin.
Boeing is offering an MLG center axle exchange program for those Customers who would like to purchase an exchange axle to facilitate their inspection/overhaul program. Please contact Boeing for availability and detailed terms and conditions.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Operator Supplied Parts/Materials.
Refer to Paragraph 2.A., Material - Price and Availability
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LUBRICATE THE PIVOT JOINT OF BOTH MLGS AND REPEAT THE LUBRICATION. DO A DETAILED, MAGNETIC PARTICLE AND, IF
NECESSARY, NITAL ETCH INSPECTION OF THE MLG PIVOT
JOINTS, INCLUDING THE CENTER AXLE, INNER CYLINDER BUSHINGS AND INNER CYLINDER LUG BORES. IF NO DAMAGE IS FOUND, REPEAT THE INSPECTION. IF DAMAGE IS FOUND INSPECTION. REPAIR OR REPLACE THE DAMAGED PARTS AND REPEAT THE 1853457 Original Issue: December 09, 2010 777-32A0082
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Commercial Airplanes 777 Service Bulletin ALERT Number: 777-32A0082 Original Issue: December 09, 2010 ATA System: 3211 SUBJECT: LANDING GEAR - Main Landing Gear - Shock Strut and Center Axle Inner Cylinder Pivot Joint Lubrication and Inspection
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 D624W001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is for the airplanes shown below.
DESCRIPTIONCONFIGURATIONGROUP 777-200, -300 Airplanes line numbers 1 through 914.-1 Airplanes that have not done pivot joint lubrication every 50 flight cycles or 25 days, whichever occurs later, since main landing gear was new, last overhauled, last Part 2 Inspection of this service bulletin or last Part 2 Inspection of SB 777-32-0080.
1 Airplanes that have done pivot joint lubrication every 50 flight cycles or 25 days, whichever occurs later, since main landing gear was new, last overhauled, last Part 2 Inspection of this service bulletin or last Part 2 Inspection of SB 777-32-0080.
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DESCRIPTIONCONFIGURATIONGROUP 777-200LR, -300ER and 777F Airplanes line numbers 1 through 914.-2 Airplanes that have not done pivot joint lubrication every 50 flight cycles or 25 days, whichever occurs later, since main landing gear was new, last overhauled, last Part 2 Inspection of this service bulletin or last Part 2 Inspection of SB 777-32-0080.
1 Airplanes that have done pivot joint lubrication every 50 flight cycles or 25 days, whichever occurs later, since main landing gear was new, last overhauled, last Part 2 Inspection of this service bulletin or last Part 2 Inspection of SB 777-32-0080.
2 Airplane Models:
777-200, 777-200LR, 777-300, 777-300ER, 777F GroupVariable Number 1WA001 - WA017 1WA076 - WA080 1WA086 - WA093 1WA101 - WA104 1WA116 - WA119 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
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GroupVariable Number 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 1WB476 1WB481 - WB484 1WB501 - WB512 1WB531 - WB537 1WB551 - WB554 1WB591 - WB597 1WB601 - WB606 1WB611 - WB622 1WB631 - WB638 1WB646 - WB649 1WC051 - WC073 1WC101 - WC104 1WC111 - WC120 1WC221 - WC224 1WC241 - WC243
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GroupVariable Number 1WC281 - WC290 1WC301 - WC308 1WC361 - WC364 1WC371 - WC374 1WC381 - WC395 1WC441 1WC446 - WC449 1WC456 - WC459 1WC486 - WC493 1WC506 - WC508 1WC521 - WC522 1WC531 - WC536 1WC546 - WC548 1WC556 1WC566 - WC567 1WC571 - WC574 1WC581 2WD001 - WD002 2WD011 - WD018 2WD031 - WD036 2WD046 - WD055 2WD066 - WD075 2WD081 - WD088 2WD091 2WD096 2WD101 - WD103 2WD501 - WD513 2WD521 - WD541 2WD546 - WD554 2WD561 - WD573 2WD581 - WD599 2WD606 - WD609 2WD621 - WD632
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