 | GEnx-1B SERVICE BULLETIN - 79-0020 R02 | Revised: 08/14/2017 |
| SB 79-0020 R02 OIL - Fuel/Oil Heat Exchanger (79-21-00) - Fuel/Oil Heat Exchanger Transfer Tube Improvement | Issued: 12/22/2014 | |
| GEnx-1B SERVICE BULLETIN - 79-0020 R02 | Revised: 08/14/2017 |
| SB 79-0020 R02 OIL - Fuel/Oil Heat Exchanger (79-21-00) - Fuel/Oil Heat Exchanger Transfer Tube Improvement | Issued: 12/22/2014 | |
| GE PROPRIETARY INFORMATION | |
| The information contained in this document is GE proprietary information and is disclosed in confidence. It is the property of GE and shall not be used, disclosed to others or reproduced without the express written consent of GE, including, but without limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modifications, spare parts, designs, or configuration changes or to obtain FAA or any other government or regulatory approval to do so. If consent is given for reproduction in whole or in part, this notice and the notice set forth on each page of this document shall appear in any such reproduction in whole or in part. | |
| This technical data is considered EAR controlled pursuant to 15 CFR Parts 730-774 respectively. Transfer of this data by any means to a Non-US Person, whether in the United States or abroad, without the proper U.S. Government authorization (e.g., License, exemption, NLR, etc.), is strictly prohibited. | |
| Copyright (2017) General Electric Company, U.S.A. |
| TRANSMITTAL INFORMATION |
| REVISION 2 TO SERVICE BULLETIN 79-0020 |
| Revision 2 is issued to update the attached Woodward Service Bulletin 82933-79-0002 to Revision 2 and paragraphs 1., PLANNING INFORMATION, 2., MATERIAL INFORMATION, 3., ACCOMPLISHMENT INSTRUCTIONS, and 4., APPENDIX A. |
| Revision 1 was issued September 24, 2015. The original was issued December 22, 2014. Revision bars in the left margin identify changes. |
| 1. | PLANNING INFORMATION |
| A. | Effectivity |
|
| This Service Bulletin has been introduced in production to these GEnx-1B engines: |
| • |
|
| These serial numbers are the best available data. |
| The fuel/oil heat exchanger VIN 8103-017 (P/N 2550M15P01) and VIN 8103-023 (P/N 2550M15P03) are affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin introduces new fuel/oil heat exchangers VIN 8103-022 (P/N 2550M15P02) and VIN 8103-024 (P/N 2550M15P04) that incorporate an improved backup ring. |
| C. | Compliance |
| Category 3 |
| GE recommends that you do this Service Bulletin at the next shop visit of the engine. |
| Impact D |
| This recommendation is to address a condition that may result in a Delay or Cancellation (D&C). |
| NOTE: |
|
| This Service Bulletin is offered to improve the reliability or performance of your GE product, or to help prevent the occurrence of the event or condition described in this Service Bulletin. If the operator elects not to participate in the bulletin, that decision will be taken into consideration by GE in evaluating future product performance issues that may arise in the operators fleet. |
| D. | Concurrent Requirements |
| Do GEnx-1B S/B 72-0269 when you do this Service Bulletin. |
| E. | Reason |
| (1) | Objective: |
| To introduce a new part and improve reliability. |
| (2) | Condition: |
| The backup ring of the current fuel/oil heat exchanger outlet transfer tube caused wear on sealing surface of the fuel adapter. |
| (3) | Cause: |
| The O-ring nibbling around the circumference of the wear caused fuel leak. |
| (4) | Improvement: |
| The change of the backup ring material from PTFE (15 percent glass fill) to Parback (fluorocarbon) prevents damage to the transfer tube, and thus damage to the O-ring. |
| (5) | Substantiation: |
| Substantiation is by comparative analysis. |
| F. | Approval |
| The data contained in this Service Bulletin has been reviewed by the appropriate governmental authority and the repair(s) and modification(s) herein comply with the applicable Aviation Regulations and are APPROVED for installation in the model(s) listed in this Service Bulletin. |
| G. | Manpower |
| After you get access to the fuel/oil heat exchanger, you will need approximately 2.0 man-hours for each engine or component. |
| H. | Weight and Balance |
| Weight and balance are not changed. |
| I. | References (Use the latest version of these documents) |
| GEK 114094, GEnx-1B Component Maintenance Manual (CMM), 79-11-16 |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| Woodward SB 82933-79-0002 |
| GEnx-1B, Boeing 787 Aircraft Maintenance Manual, (AMM) |
| GEnx-1B S/B 72-0269, ENGINE - ACCESSORY GEARBOX MODULE ASSEMBLY (72-00-05) - INTRODUCTION OF NEW SHIELD SEAL P/N 2610M62P01 |
| NOTE: |
|
| J. | Publications Affected |
| GEK 114094, GEnx-1B Component Maintenance Manual (CMM), 79-11-16 |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| K. | Interchangeability |
| One-way interchangeable. |
| L. | Software Accomplishment Summary |
| Not applicable. |
| 2. | MATERIAL INFORMATION |
| A. | Material - Price and Availability |
| (1) | Parts necessary to do this Service Bulletin: |
|
| NOTE: |
|
| NOTE: |
|
| (2) | Other Spare Parts: |
|
| *Part not supplied by GE Engine Services Distribution L.L.C. Procure through: |
| Woodward, Inc. |
| Attn: Customer Service |
| 5001 North Second Street |
| P.O. Box 7001 |
| Rockford, IL 61125-7001 |
| U.S.A. |
| NOTE: |
|
| NOTE: |
|
| (3) | Consumables: |
| Refer to the attached Woodward SB 82933-79-0002 (latest version). |
| B. | Industry Support Information |
| None. |
| C. | Configuration Chart |
|
| Operation Codes RE=Replace RM=Remains RW=Rework |
| Change Codes 1=One-way interchangeable. |
| Support Codes A=Old parts will no longer be supplied. |
| D. | Parts Disposition |
| Rework. |
| E. | Tooling - Price and Availability |
| Refer to the attached Woodward SB 82933-79-0002 (latest version). |
| 3. | ACCOMPLISHMENT INSTRUCTIONS |
| A. | Removal |
| (1) | If necessary, remove the EDP to get access to the fuel/oil heat exchanger. Refer to the GEnx-1B Boeing 787 AMM, TASK DMC-B787-A-29-11-02-00B-520A-A. |
| (2) | Remove the fuel/oil heat exchanger. Refer to the GEnx-1B Boeing 787 AMM, TASK DMC-B787-A-G79-21-01-00A-520A-A. |
| B. | Rework |
| (1) | Rework the fuel/oil heat exchanger. Refer to the attached Woodward SB 82933-79-0002 (latest version). |
| C. | Installation |
| (1) | Install the fuel/oil heat exchanger. Refer to the GEnx-1B, Boeing 787 AMM, TASK DMCB787- A-G79-21-01-00A-720A-A. |
| (2) | If necessary, install the EDP. Refer to the GEnx-1B Boeing 787 AMM, TASK DMC-787-A-29-11-02-00-720A-A. |
| 4. | APPENDIX A |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
| NOTE: |
|