 | GEnx-1B SERVICE BULLETIN - 72-0024 R00 | Revised: 09/08/2011 |
| SB 72-0024 R00 ENGINE - HPC Rotor Assembly (72-31-00) - Introduction of New Compressor Wire Seal | Issued: 09/08/2011 | |
| GEnx-1B SERVICE BULLETIN - 72-0024 R00 | Revised: 09/08/2011 |
| SB 72-0024 R00 ENGINE - HPC Rotor Assembly (72-31-00) - Introduction of New Compressor Wire Seal | Issued: 09/08/2011 | |
| 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 wire seal P/N 9392M22P01 is affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin releases a new compressor wire seal (wire seal) P/N 2454M03P01 made from a different material. |
| C. | Compliance |
| Category 5 |
| GE recommends that you do this Service Bulletin as soon as the wire seal is removed from the engine. |
| 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 |
| None. |
| E. | Reason |
| (1) | Objective: |
| To introduce a new part and improve maintainability. |
| (2) | Condition: |
| The old wire seal made from inconel 718 may cause wear in the wire seal grooves of the stages 6-10 compressor rotor spool (stages 6-10 spool). |
| (3) | Cause: |
| Relative motion of the similar materials of the old wire seal and the stages 6-10 spool material, provides the potential for an increased wear rate between the wire seal and the wire seal grooves. |
| (4) | Improvement: |
| The new wire seal made from L605 provides a dissimilar material. This material has shown in lab testing to provide a reduced wear rate between the new wire seal and the wire seal grooves. |
| (5) | Substantiation: |
| Substantiation is by analysis and test. |
| F. | Approval |
| This Service Bulletin contains no modification information that revises the approved configuration and therefore does not require FAA approval. |
| G. | Manpower |
| No additional man-hours are required to comply with this Service Bulletin. |
| H. | Weight and Balance |
| Weight and balance are not changed. |
| I. | References (Use the latest version of these documents) |
| GEK 112851, GEnx-1B Engine Manual (EM) |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| NOTE: |
|
| J. | Publications Affected |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| K. | Interchangeability |
| Qualified interchangeability. |
| L. | Software Accomplishment Summary |
| Not applicable. |
| 2. | MATERIAL INFORMATION |
| A. | Material - Price and Availability |
| (1) | Parts necessary to do this Service Bulletin: |
|
| NOTE: |
|
| (2) | Other Spare Parts: |
| None. |
| (3) | Consumables: |
| None. |
| B. | Industry Support Information |
| None. |
| C. | Configuration Chart |
|
| Operation Codes RE=Replace RM=Remains |
| Change Code 5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability. |
| Support Code A=Old parts will no longer be supplied. |
| D. | Parts Disposition |
| Discard old parts. |
| E. | Tooling - Price and Availability |
| None. |
| 3. | ACCOMPLISHMENT INSTRUCTIONS |
| A. | General |
| (1) | Removal and Installation instructions for the wear seal have not changed. Refer to the GEnx-1B EM, 72-31-00, DISASSEMBLY 001 and ASSEMBLY 001. |