### Commercial **Airplane Group**  

# 777 Service Bulletin **SPECIAL ATTENTION Number: 777-32-0080**  Date: July 10, 2008 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. 9E991 ECCN: 

## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2008 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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, MD-10, MD-11, MD-80, MD-88, MD-90, 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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 1 of 32 3.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 2 of 32 **BOEING SERVICE BULLETIN 777-32-0080**

BLANK PAGE**Table of Contents** Summary ..................................................... 5 1. PLANNING INFORMATION ......................................... 9 A. Effectivity ................................................ 9 1. Airplanes ............................................. 9 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 1. Existing Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2. Data supplied with this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3. Installation Drawings Used in the Preparation of this Service Bulletin . . . . . . . . . . . . 19 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 22 3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 22 3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 FIGURE 1: INSPECTION OF THE LEFT MLG PIVOT JOINT . . . . . . . . . . . . . . . . . . . . . . 26 FIGURE 2: INSPECTION OF THE RIGHT MLG PIVOT JOINT . . . . . . . . . . . . . . . . . . . . . . 29 APPENDIX A: CENTER AXLE ASSEMBLY AND INNER CYLINDER ASSEMBLY REPLACEMENT INTERCHANGEABILITY BASED ON AIRPLANE MINOR MODEL . . . . . . . . . . . . . 32

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 3 of 32 **BOEING SERVICE BULLETIN 777-32-0080**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 4 of 32 **BOEING SERVICE BULLETIN 777-32-0080**

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### Commercial **Airplane Group**  

# 777 Service Bulletin **SPECIAL ATTENTION Summary**  **Number: 777-32-0080** Date: July 10, 2008 ATA System: 3211 **SUBJECT:** LANDING GEAR - Main Landing Gear - Shock Strut and Center Axle Inner Cylinder Pivot Joint - Lubrication and Inspection BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY. **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 airplanes that visit Short Wavelength Roughness (SWR) Level 2 runways. Airplanes that visit SWR Level 2 runways 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 partial collapse of a MLG and loss of control during ground operations. The type of runway surface roughness that causes damage to the MLG pivot joint is described by a factor called SWR. SWR Level 1 airports are airports outside of the Commonwealth of Independent States (CIS) and specified airports within the CIS for which data has shown acceptable pivot joint response. SWR Level 2 airports are all other airports within the CIS that are not identified as SWR Level 1. CIS means the following countries: Armenia, Azerbaijan, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan. Refer to Boeing Service Letter 777-SL-32-058 for an active list of SWR Level 1 and SWR Level 2 runways. SWR Level 2 runways have caused fractures of MLG pivot joint components of 757 and 767 airplanes. One 757 airplane experienced fractures in both MLG bogie beams at the same landing. That airplane had accumulated 4,952 flight hours and 1,055 flight cycles. One 767 MLG bogie beam fracture occurred as the airplane was making a U-turn at the end of the runway, before takeoff. All three bogie beams fractured at the pivot joint, which caused the inner cylinder to contact the ground. This service bulletin provides the instructions for increased lubrication, inspection and repair of the MLG pivot joint components on airplanes that visit SWR Level 2 runways. 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-32-0145 is related to this service bulletin.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 5 of 32**ACTION Group 1, Configuration 1:**  No action required by this service bulletin. **Group 1, Configuration 2-3:** Get access to the left and right MLG wheel wells. Lubricate the pivot joint of both MLGs. Remove the landing gear trucks, center axles and inner cylinder lugs bushings of both MLGs. Do a detailed, magnetic particle and nital etch inspection of the MLG pivot joints, including the center axle and inner cylinder lug bores. If no damage is found, repeat the inspection. If damage is found, repair or replace the damaged parts. Install new bushings in the inner cylinder lug bores. **EFFECTIVITY** All 777-200, 777-200LR, 777-300, 777-300ER Airplanes. Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes. **COMPLIANCE** 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. **MANPOWER** Refer to Paragraph 1.G., Manpower. **MATERIAL INFORMATION** Operator Supplied Parts/Materials. Refer to Paragraph 2.A., Material - Price and Availability

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 6 of 32 **BOEING SERVICE BULLETIN 777-32-0080**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 7 of 32 **BOEING SERVICE BULLETIN 777-32-0080**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 8 of 32 **BOEING SERVICE BULLETIN 777-32-0080**

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### Commercial **Airplane Group**  

# 777 Service Bulletin **SPECIAL ATTENTION Number: 777-32-0080**  Date: July 10, 2008 ATA System: 3211 **SUBJECT:** LANDING GEAR - Main Landing Gear - Shock Strut and Center Axle Inner Cylinder Pivot Joint - Lubrication and Inspection BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY. **1. PLANNING INFORMATION A. Effectivity**  1. Airplanes This service bulletin is for the airplanes shown below. Refer to Service Bulletin Index Document D624W001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data. **NO TE:**  This Service Bulletin is for the airplanes identified below. The Effectivity list shown below is complete for airplanes through line number 769. Airplanes after line number 769 are also affected by this service bulletin, and are in Group(s): 1
**DESCRIPTION CONFIGURATION**  **GROUP** All 777-200, 777-200LR, 777-300, 777-300ER Airplanes.

- 1 Airplanes that have never visited an SWR Level 2 airport. 1 Airplanes that do pivot joint lubrication before and after every visit to an SWR Level 2 airport. 2
Airplanes that do not do pivot joint lubrication before and after every visit to an SWR Level 2 airport. 3

Airplane Models: 777-200, 777-200LR, 777-300, 777-300ER **Group Variable Number**  1 WA001 - WA017

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 9 of 32**Group Variable Number**  1 WA076 - WA080 1 WA086 - WA093 1 WA101 - WA104 1 WA116 - WA119 1 WA131 - WA137 1 WA171 - WA175 1 WA196 - WA198 1 WA206 - WA212 1 WA221 - WA223 1 WA231 - WA232 1 WA241 - WA250 1 WA261 - WA266 1 WA281 - WA283 1 WA301 - WA304 1 WB001 - WB021 1 WB031 - WB046 1 WB051 - WB088 1 WB101 - WB106 1 WB121 - WB125 1 WB131 - WB148 1 WB151 - WB155 1 WB161 - WB177 1 WB181 - WB194 1 WB201 - WB215 1 WB231 - WB247 1 WB271 - WB273 1 WB276 - WB286 1 WB291 - WB302 1 WB306 - WB307 1 WB311 - WB337 1 WB341 - WB342 1 WB366 - WB368 1 WB371 - WB388

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 10 of 32 **BOEING SERVICE BULLETIN 777-32-0080 Group**  **Variable Number** 1 WB406 1 WB411 - WB413 1 WB416 - WB439 1 WB446 - WB453 1 WB476 1 WB481 - WB484 1 WB501 - WB512 1 WB531 - WB537 1 WB551 - WB554 1 WB591 - WB597 1 WB601 - WB606 1 WB611 - WB622 1 WB631 - WB638 1 WB646 - WB649 1 WC051 - WC073 1 WC101 - WC104 1 WC111 - WC120 1 WC221 - WC222 1 WC241 - WC243 1 WC281 - WC290 1 WC301 - WC308 1 WC361 - WC364 1 WC371 - WC374 1 WC381 - WC395 1 WC441 1 WC446 - WC449 1 WC456 - WC459 1 WC486 - WC493 1 WC506 - WC508 1 WC521 - WC522 1 WC531 - WC536 1 WC546 - WC548 1 WC556

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 11 of 32 **BOEING SERVICE BULLETIN 777-32-0080 Group**  **Variable Number** 1 WC566 - WC567 1 WD001 - WD002 1 WD011 - WD015 1 WD031 - WD036 1 WD046 - WD054 1 WD066 - WD068 1 WD081 - WD082 1 WD501 - WD510 1 WD521 - WD539 1 WD546 - WD552 1 WD561 - WD573 1 WD581 - WD599 1 WD606 - WD609 1 WD621 - WD632 1 WD651 - WD662 1 WD671 - WD675 1 WD691 - WD709 1 WD741 - WD751 1 WD761 - WD770 1 WD786 - WD788 1 WD796 - WD805 1 WD826 - WD830 1 WD846 - WD852 1 WD871 - WD876 1 WD911 - WD912 1 WD936 - WD939 1 WD966 - WD968 2. Spares Affected None. **B. Concurrent Requirements** None.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 12 of 32 **BOEING SERVICE BULLETIN 777-32-0080 C. Reason**  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 airplanes that visit Short Wavelength Roughness (SWR) Level 2 runways. Airplanes that visit SWR Level 2 runways 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 partial collapse of a MLG and loss of control during ground operations. The type of runway surface roughness that causes damage to the MLG pivot joint is described by a factor called SWR. SWR Level 1 airports are airports outside of the Commonwealth of Independent States (CIS) and specified airports within the CIS for which data has shown acceptable pivot joint response. SWR Level 2 airports are all other airports within the CIS that are not identified as SWR Level 1. CIS means the following countries: Armenia, Azerbaijan, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan. Refer to Boeing Service Letter 777-SL-32-058 for an active list of SWR Level 1 and SWR Level 2 runways. SWR Level 2 runways have caused fractures of MLG pivot joint components of 757 and 767 airplanes. One 757 airplane experienced fractures in both MLG bogie beams at the same landing. That airplane had accumulated 4,952 flight hours and 1,055 flight cycles. One 767 MLG bogie beam fracture occurred as the airplane was making a U-turn at the end of the runway, before takeoff. All three bogie beams fractured at the pivot joint, which caused the inner cylinder to contact the ground. This service bulletin provides the instructions for increased lubrication, inspection and repair of the MLG pivot joint components on airplanes that visit SWR Level 2 runways. 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-32-0145 is related to this service bulletin. **D. Description Group 1, Configuration 1:**  No action required. **Group 1, Configuration 2-3:** Get access to the left and right MLG wheel wells. Lubricate the pivot joint of both MLGs. Remove the landing gear trucks, center axles and inner cylinder lugs bushings of both MLGs. Do a detailed, magnetic particle and nital etch inspection of the MLG pivot joints, including the center axle and inner cylinder lug bores. If no damage is found, repeat the inspection. If damage is found, repair or replace the damaged parts. Install new bushings in the inner cylinder lug bores. The work in this service bulletin is done in the maintenance zone(s) given below.
**Affected Maintenance Zones Zone**  **Model** 731, 741 777-200, 777-200LR, 777-300, 777-300ER

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 13 of 32 **BOEING SERVICE BULLETIN 777-32-0080 E. Compliance**  NOTE: For the following tables, a SWR Level 2 runway visit is defined as one landing at an SWR Level 2 runway followed by one takeoff from an SWR Level 2 runway. **Group 1, Configuration 1: T** 

**ab le 1:**  **Airplanes That Ha** **ve Ne ver**  **Visited a SWR Le vel 2 Runwa** **y Repeat Interval**  **(Not to Exceed) Compliance Time**  **Action Condition** 

- - No action required by this service bulletin. All Airplanes
**Group 1, Configuration 2: T** 

**ab le 2:**  **Airplanes That Do Piv** **ot Joint Lubrication Bef ore and After Ever** **y Visit to a SWR Le** **vel 2 Runwa y**  **Repeat Interval (Not to Exceed)**  **Compliance Time (Whichever Occurs Later)**  **Action Condition**  Immediately before and after each SWR Level 2 Runway Visit. (b) - Within 30 Days After the Date on this Service Bulletin Do Part 1 - MLG Pivot Joint Lubrication (c) All Airplanes (a)

-ANDEvery 800 SWR Level 2 Runways Visits Within 12 months After the Date on this Service Bulletin. Before 800 Total SWR Level 2 Runway Visits Do Part 2 - MLG Pivot Joint Inspection (c) -OR- -OR- Within 48 months of next SWR Level 2 Runway Visit, whichever is first. (a) Within 48 Months of the First SWR Level 2 Runway Visit, whichever is first

- - Before further flight. Remove the inner cylinder and repair the inner cylinder lug bores as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.a.1. Condition 1: inner cylinder lug bores are damaged within the repair limits as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.a. -ORReplace the inner cylinder with a new, overhauled or serviceable inner cylinder as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.a.2.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 14 of 32 **BOEING SERVICE BULLETIN 777-32-0080 Group 1, Configuration 2:**  **T**

**ab le 2:**  **Airplanes That Do Piv** **ot Joint Lubrication Bef ore and After Ever** **y Visit to a SWR Le** **vel 2 Runwa y**  **Repeat Interval (Not to Exceed)**  **Compliance Time (Whichever Occurs Later)**  **Action Condition** 

- - Before further flight. Replace the inner cylinder with a new, overhauled or serviceable inner cylinder as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.b.1. Condition 2: inner cylinder lug bores are damaged more than the repair limits as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.b.

- - Before further flight. No repair required. Replace the finish on the inner cylinder lug bores as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.c.1. Condition 3: No damage to inner cylinder lug bores.

- - Before further flight. Repair the center axle as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.d.1. Condition 4: Center axle is damaged within the repair limits as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.d. -ORReplace the center axle with a new, overhauled or serviceable center axle as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.d.2.

- - Before further flight. Replace the center axle with a new, overhauled or serviceable center axle as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.e.1. Condition 5: Center axle is damaged more than the repair limits as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.e.

- - - No repair required. Condition 6: No damage to center axle. (a) If no visits to an SWR Level 2 runway have taken place since the last inspection as given in this service bulletin, or since last MLG overhaul, then no action is required until the first SWR Level 2 runway visit occurs. (b) Refer to 777 MPD Item 12-080-00 for additional routine lubrication requirements. (c) As given in Paragraph 3.B., Work Instructions.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 15 of 32 **BOEING SERVICE BULLETIN 777-32-0080 Group 1, Configuration 3:**  **T**

**ab le 3:**  **Airplanes That Do Not Do Piv** **ot Joint Lubrication Bef ore and After Ever**  **y Visit to a SWR Le** **vel 2 Runwa** **y Repeat Interval**  **(Not to Exceed) Compliance Time (Whichever**  **Occurs First) Action**  **Condition** Every 20 flight cycles. (b) - Within 30 Days After the Date on the Service Bulletin Do Part 1 - MLG Pivot Joint Lubrication (c) All Airplanes (a)

-ANDEvery 500 SWR Level 2 Runway Visits Within 12 months After the Date on this Service Bulletin. Before 500 Total SWR Runway Level 2 Visits Do Part 2 - MLG Pivot Joint Inspection (c) -OR- -OR- Within 18 months of next SWR Level 2 Runway Visit, whichever is first. (a) Within 18 Months of the First SWR Level 2 Runway Visit, whichever is first.

- - Before further flight. Remove the inner cylinder and repair the inner cylinder lug bores as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.a.1. Condition 1: inner cylinder lug bores are damaged within the repair limits as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.a. -ORReplace the inner cylinder with a new, overhauled or serviceable inner cylinder as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.a.2.

- - Before further flight. Replace the inner cylinder with a new, overhauled or serviceable inner cylinder as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.b.1. Condition 2: inner cylinder lug bores are damaged more than the repair limits as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.b.

- - - No repair required. Replace the finish on the inner cylinder lug bores as given in Paragraph 3.B., Work Instructions Part 2, Paragraph 5.c.1. Condition 3: No damage to inner cylinder lug bores.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 16 of 32 **BOEING SERVICE BULLETIN 777-32-0080 Group 1, Configuration 3:**  **T**

**ab le 3:**  **Airplanes That Do Not Do Piv** **ot Joint Lubrication Bef ore and After Ever**  **y Visit to a SWR Le** **vel 2 Runwa** **y Repeat Interval**  **(Not to Exceed) Compliance Time (Whichever**  **Occurs First) Action**  **Condition**

- - Before further flight. Repair the center axle as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.d.1. Condition 4: Center axle is damaged within the repair limits as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.d. -ORReplace the center axle with a new, overhauled or serviceable center axle as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.d.2.

- - Before further flight. Replace the center axle with a new, overhauled or serviceable center axle as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.e.1. Condition 5: Center axle is damaged more than the repair limits as given in Paragraph 3.B., Work Instructions Part 2,Paragraph 5.e.

- - - No repair required. Condition 6: No damage to center axle. (a) If no visits to an SWR Level 2 runway have taken place since the last inspection as given in this service bulletin, or since last MLG overhaul, then no action is required until the first SWR Level 2 runway visit occurs. (b) This repeat interval satisfies 777 MPD Item 12-080-00 routine lubrication requirements. (c) As given in Paragraph 3.B., Work Instructions. **F. Approval** This service bulletin was examined by the Federal Aviation Administration (FAA).The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other approved Boeing changes. If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 17 of 32 **BOEING SERVICE BULLETIN 777-32-0080 G. Manpower**  The table below shows an estimate of the task hours necessary to do this inspection and possible repair for each airplane. This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator task hour data if necessary. The estimate does not include lost time. These are some examples of lost time: • Time to adjust to the workplace • Time to schedule the work • Time to inspect the work • Time to cure the materials • Time to make the parts • Time to find the tools. **Elapsed Hours Task Hours**  **Number of Persons**  **Task**
2.00 4.00 2 Part 1 7.00 42.00 6 Part 2: Figure 1 7.00 42.00 6 Part 2: Figure 2 16.00 (a) 88.00 (a) TOTAL FOR EACH AIRPLANE (a) Estimate does not include repairs. Should any repairs be required, more time may be necessary. **H. Weight and Balance Changes** None. **I. Electrical Load Data** Not changed. **J. References** 1. Existing Data a. Boeing Service Letter 777-SL-32-058 b. Boeing Service Related Problem (SRP) 777-SRP-32-0145 c. Component Maintenance Manual (CMM) 32-00-07, 32-11-03, 32-11-07, 32-11-65 d. Standard Overhaul Practices Manual (SOPM) 20-10-02, 20-20-01, 20-20-02 e. 777 Aircraft Maintenance Manual (AMM) 12-21-14, 32-00-15, 32-00-30, 32-11-04, 32-11-18, 32-11-26 f. 777 Maintenance Planning Data (MPD) Item 12-080-00 g. 777 Non-Destructive Testing (NDT) Manual Part 6, 51-00-04

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 18 of 32 **BOEING SERVICE BULLETIN 777-32-0080**2. Data supplied with this Service Bulletin None. 3. Installation Drawings Used in the Preparation of this Service Bulletin
**Title Drawing Number**  Installation - Main Landing Gear 161W0000 This drawing was used to prepare this service bulletin. This drawing is not necessary to make the specified changes, and is not supplied with this service bulletin.This drawing may not be applicable to all airplane configurations or operators. **K. Publications Affected** None. **L. Interchangeability and Intermixability of Parts** Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 19 of 32 **BOEING SERVICE BULLETIN 777-32-0080**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 20 of 32 **BOEING SERVICE BULLETIN 777-32-0080**

BLANK PAGE**2. MATERIAL INFORMATION A. Material - Price and Availability**  Boeing can supply the parts shown in Paragraph 2.C., Parts Necessary for Each Airplane as shown below. Parts availability is shown in the Reorder Lead Time (ROLT). ROLT is calculated from the date Boeing gets the purchase order.
**Unit Price thru December 31, 2008**  **ROLT (Weeks)**  **Name Part Number**  $45,806.00 94 Center Axle Assy 161W1163-13 (a) $46,902.00 91 Center Axle Assy 161W1163-15 (a) $206,795.00 140 Inner Cylinder Assy 161W1255-7 $233,801.00 89 Inner Cylinder Assy 161W2120-3 $2,686.00 40 Bushing, Inner Cylinder 161W1122-2 (a) For alternate part numbers that can be used, refer to APPENDIX A. The parts are subject to the terms and conditions of the Boeing standard purchase order acknowledgment. After the Unit Price date, new price and ROLT data is applicable. Prices are in United States dollars. Terms: Net 30 days. **Ref erence this ser**  **vice b ulletin and submit y** **our pur c**  **hase or der b** **y one of the methods that f** **ollo w:**  1. Order on-line via ATA Spec 2000 or Boeing Part Page 2. Fax to (206) 662-7145 3. Spares Customer Support - MC 36-65 Boeing Spares Department P.O. Box 3707 Seattle, Washington 98124-2207 USA **B. Industry Support Information** Boeing warranty remedies are not available for the configuration changes inspection, and/or repair procedures given in this service bulletin. **C. Parts Necessary For Each Airplane** 1. Kits/Parts None.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 21 of 32 **BOEING SERVICE BULLETIN 777-32-0080**2. Parts and Materials Supplied by the Operator
**Notes Name**  **QTY Part Number /**  **Specification** Grease

- Royco 11MS Sealant

- BMS 5-95 Primer

- BMS 10-79 Type III Refer to APPENDIX A for part number applicability. Center Axle Assy 2 161W1163-1, -3, -5, -7, -11, -13, or -15 Refer to APPENDIX A for part number applicability. Inner Cylinder Assy 2 161W1120-3, -5
Refer to APPENDIX A for part number applicability. Inner Cylinder Assy 2 161W1255-1, -5, -7
Refer to APPENDIX A for part number applicability. Inner Cylinder Assy 2 161W2120-1, -3 (a) Bushing, Inner Cylinder 4 161W1122-2 (a) This part can be fabricated as given in CMM 32-11-03 or CMM 32-11-65, as applicable. Oversized bushings can also be fabricated.
3. Parts Modified and Reidentified None. 4. Parts Removed and Not Replaced None. **D. Parts Necessary to Change Spares** None. **E. Special Tooling - Price and Availability** None. **F. Special Tooling Necessary to do this Service Bulletin** No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine operator tool supply to make sure all necessary tools are available.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 22 of 32 **BOEING SERVICE BULLETIN 777-32-0080 3. ACCOMPLISHMENT INSTRUCTIONS**  **A. GENERAL INFORMATION CA**  **UTION:** KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL, METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR OTHER ELECTRICAL DAMAGE. **NO TE:**  1. The instructions identified in Paragraph 3.B., Work Instructions and the Figure(s) give the recommended sequence of steps. The sequence of steps to do this service bulletin can be changed. 2. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for definition of the acronyms. 3. Obey all of the warnings and cautions given in the specified manual sections. 4. For approved fastener and process material substitutions, refer to 777 SRM, Chapter 51. Alternate fasteners are given in 777 SRM Chapter 51 and Boeing Drawing 012W6100. 5. A Detailed Inspection is defined as: An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors, magnifying lenses, etc. may be necessary. Surface cleaning and elaborate procedures may be required. 6. These work instructions refer to procedures included in other Boeing documents. When the words "refer to" are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used. When the words "as given in" are included in the instruction, the procedure in the Boeing document must be used. **B. WORK INSTRUCTIONS Group 1, Configuration 1:**  1. No action required by this service bulletin. **Group 1, Configuration 2-3: P**  **ar t 1 - Main Landing Gear Piv** **ot Joint Lubrication** 1. Install the main landing gear (MLG) and nose landing gear (NLG) downlock pins. Refer to 777 AMM 32-00-30 as an accepted procedure. 2. Install the MLG and NLG door safety pins. Refer to 777 AMM 32-00-15 as an accepted procedure. 3. Lubricate the MLG pivot joints. Refer to 777 AMM 12-21-14 as an accepted procedure.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 23 of 32 **BOEING SERVICE BULLETIN 777-32-0080**4. Remove the MLG and NLG door safety pins. Refer to 777 AMM 32-00-15 as an accepted procedure. 5. Remove the MLG and NLG downlock pins. Refer to 777 AMM 32-00-30 as an accepted procedure. 6. Put the airplane back into serviceable condition. **Group 1, Configuration 2-3: P**  **ar t 2 - Main Landing Gear Piv** **ot Joint Inspection** 1. Install the MLG and NLG downlock pins. Refer to 777 AMM 32-00-30 as an accepted procedure. 2. Install the MLG and NLG door safety pins. Refer to 777 AMM 32-00-15 as an accepted procedure. 3. Remove the left and right MLG trucks. Refer to 777 AMM 32-11-18 as an accepted procedure. 4. Remove the bushings from the inner cylinder lugs and discard. Refer to CMM 32-11-03 or CMM 32-11-65 as accepted procedures, as applicable. 5. Inspect the center axle and inner cylinder lug bores of the left MLG as given in FIGURE 1 and the right MLG as given in FIGURE 2. a. Condition 1: inner cylinder lug bores are damaged within the repair limits as given in CMM 32-11-03 or CMM 32-11-65, as applicable. (1) Option 1: Remove the inner cylinder. Refer to 777 AMM 32-11-04 as an accepted procedure. Repair the inner cylinder lug bores as given in CMM 32-11-03 Repair 4-2 or CMM 32-11-65 Repair 5-2, as applicable. (2) Option 2: Replace the inner cylinder with a new, overhauled or serviceable inner cylinder. Refer to 777 AMM 32-11-04 as an accepted procedure. b. Condition 2: inner cylinder lug bores are damaged more than the repair limits as given in CMM 32-11-03 or CMM 32-11-65, as applicable. (1) Replace the inner cylinder with a new, overhauled or serviceable inner cylinder. Refer to 777 AMM 32-11-04 as an accepted procedure. c. Condition 3: No damage to inner cylinder lug bores. (1) No repair required. Replace the finish on the inner cylinder lug bores as given in CMM 32-11-03 Repair 4-2 or CMM 32-11-65 Repair 5-2, as applicable. d. Condition 4: Center axle is damaged within the repair limits as given in CMM 32-11-07. (1) Option 1: Repair the center axle as given in CMM 32-11-07 Repair 7-2. (2) Option 2: Replace the center axle with a new, overhauled or serviceable center axle. Refer to 777 AMM 32-11-26 as an accepted procedure. Refer to APPENDIX A for center axle interchangeability based on airplane type. e. Condition 5: Center axle is damaged more than the repair limits as given in CMM 32-11-07.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 24 of 32 **BOEING SERVICE BULLETIN 777-32-0080**(1) Replace the center axle with a new, overhauled or serviceable center axle. Refer to 777 AMM 32-11-26 as an accepted procedure. Refer to APPENDIX A for center axle interchangeability based on airplane type. f. Condition 6: No damage to center axle. (1) No repair required. 6. Install new inner cylinder bushings. Refer to CMM 32-11-03 or CMM 32-11-65 as accepted procedures, as applicable. 7. Install the left and right MLG trucks. Refer to 777 AMM 32-11-18 as an accepted procedure. 8. Remove the MLG and NLG door safety pins. Refer to 777 AMM 32-00-15 as an accepted procedure. 9. Remove the MLG and NLG downlock pins. Refer to 777 AMM 32-00-30 as an accepted procedure. 10. Put the airplane back into serviceable condition.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 25 of 32 **BOEING SERVICE BULLETIN 777-32-0080 FIGURE 1: INSPECTION OF THE LEFT MLG PIVOT JOINT**  **(SHEET 1 OF 3)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 26 of 32 **BOEING SERVICE BULLETIN 777-32-0080 MORE DATA**  **QTY IDENTIFICATION**  **NAME TASK**  **STEP** Do a Detailed Inspection of the outer diameter for evidence of bronze transfer, corrosion and damage to the chrome plate. (a) - - Center Axle Inspect 1

outer diameter for cracks with a Magnetic Particle Inspection as given in SOPM 20-20-01. - - Center Axle Inspect

**FIGURE 1: INSPECTION OF THE LEFT MLG PIVOT JOINT (SHEET 2 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 27 of 32 **BOEING SERVICE BULLETIN 777-32-0080 MORE DATA**  **QTY IDENTIFICATION**  **NAME TASK**  **STEP** Do a Detailed Inspection for corrosion, bronze transfer or other damage. - - Inner Cylinder Lug Bores Inspect 2

If any damage, corrosion, or bronze transfer is found on the bore, remove the cadmium plate from the area where damage, corrosion, or bronze transfer was found. Remove the cadmium plate by manual application of ammonium nitrate solution. - - Cadmium plating Remove

Do a Nital Etch Inspection of the base metal to detect heat damage as given in SOPM 20-10-02. - - Inner Cylinder Lug Bores Inspect

for cracks with either a Penetrant Inspection as given in SOPM 20-20-02, an Eddy Current Inspection as given in 777 NDT Part 6, 51-00-04 or a Magnetic Particle Inspection as given in SOPM 20-20-01. - - Inner Cylinder Lug Bores Inspect

(a) Refer to CMM 32-00-07 for information about damage identification.

**FIGURE 1: INSPECTION OF THE LEFT MLG PIVOT JOINT (SHEET 3 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 28 of 32 **BOEING SERVICE BULLETIN 777-32-0080 FIGURE 2: INSPECTION OF THE RIGHT MLG PIVOT JOINT**  **(SHEET 1 OF 3)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 29 of 32 **BOEING SERVICE BULLETIN 777-32-0080 MORE DATA**  **QTY IDENTIFICATION**  **NAME TASK**  **STEP** Do a Detailed Inspection of the outer diameter for evidence of bronze transfer, corrosion and damage to the chrome plate. (a) - - Center Axle Inspect 1

outer diameter for cracks with a Magnetic Particle Inspection as given in SOPM 20-20-01. - - Center Axle Inspect

**FIGURE 2: INSPECTION OF THE RIGHT MLG PIVOT JOINT (SHEET 2 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 30 of 32 **BOEING SERVICE BULLETIN 777-32-0080 MORE DATA**  **QTY IDENTIFICATION**  **NAME TASK**  **STEP** Do a Detailed Inspection for corrosion, bronze transfer or other damage. - - Inner Cylinder Lug Bores Inspect 2

If any damage, corrosion, or bronze transfer is found on the bore, remove the cadmium plate from the area where damage, corrosion, or bronze transfer was found. Remove the cadmium plate by manual application of ammonium nitrate solution. - - Cadmium plating Remove

Do a Nital Etch Inspection of the base metal to detect heat damage as given in SOPM 20-10-02. - - Inner Cylinder Lug Bores Inspect

for cracks with either a Penetrant Inspection as given in SOPM 20-20-02, an Eddy Current Inspection as given in777 NDT Part 6, 51-00-04 or a Magnetic Particle Inspection as given in SOPM 20-20-01. - - Inner Cylinder Lug Bores Inspect

(a) Refer to CMM 32-00-07 for information about damage identification.

**FIGURE 2: INSPECTION OF THE RIGHT MLG PIVOT JOINT (SHEET 3 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 31 of 32 **BOEING SERVICE BULLETIN 777-32-0080 Applicable Inner Cylinder**  **Assemblies Applicable Center Axle**  **Assemblies Maximum Taxi**  **Gross Weight Airplane**  **Model** 161W1120-3, -5 161W1163-1, -3, -5, -7, -11, -13 547,000 lbs 777-200 161W1255-1, -5, -7 161W1255-1, -5, -7 161W1163-1, -3, -5, -7, -11, -13 652,000 lbs 777-200ER 161W1255-7 161W1163-3, -7, -13 658,000 lbs 777-200ER/IGW 161W1255-7 161W1163-3, -7, -13 662,000 lbs 777-300 161W2120-1, -3 161W1163-9, -15 768,800 lbs 777-200LR 161W2120-1, -3 161W1163-9, -15 777,000 lbs 777-300ER

**APPENDIX A: CENTER AXLE ASSEMBLY AND INNER CYLINDER ASSEMBLY REPLACEMENT INTERCHANGEABILITY BASED ON AIRPLANE MINOR MODEL**  **(SHEET 1 OF 1)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. July 10, 2008 777-32-0080 32 of 32 **BOEING SERVICE BULLETIN 777-32-0080**