 | GEnx-1B SERVICE BULLETIN - 72-0005 R00 | Revised: 09/01/2011 |
| SB 72-0005 R00 ENGINE - HPC Assembly - (72-30-00) - Introduction of New Slab Head Bolt P/N 2419M85P01 | Issued: 09/01/2011 | |
| GEnx-1B SERVICE BULLETIN - 72-0005 R00 | Revised: 09/01/2011 |
| SB 72-0005 R00 ENGINE - HPC Assembly - (72-30-00) - Introduction of New Slab Head Bolt P/N 2419M85P01 | Issued: 09/01/2011 | |
| 1. | PLANNING INFORMATION |
| A. | Effectivity |
| * * * FOR GEnx-1B54, -1B58, -1B64, -1B67, -1B70 |
| This Service Bulletin has been introduced in production to these GEnx-1B engines: |
| • |
|
| These serial numbers are the best available data. |
| The old slab head bolt P/N 9502M44P08 is affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin introduces a new slab head bolt P/N 2419M85P01. |
| C. | Compliance |
| Category 7 |
| GE recommends that you do this Service Bulletin at customer's option. |
| NOTE: |
|
| D. | Concurrent Requirements |
| None. |
| E. | Reason |
| (1) | Objective: |
| To introduce a new part and improve maintainability. |
| (2) | Condition: |
| During the installation of the slab head bolt, it is possible to install it incorrectly. |
| (3) | Cause: |
| The incorrect installation of the slab head bolt could damage the high pressure compressor (HPC) inner ring. |
| (4) | Improvement: |
| The new slab head bolt design has a different head shape, which makes sure that the bolt head is installed correctly. |
| (5) | Substantiation: |
| Substantiation is by comparative analysis. |
| 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 112862, GEnx-1B Cleaning, Inspection, and Repair Manual (CIR) |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| NOTE: |
|
| J. | Publications Affected |
| GEK 112851, GEnx-1B Engine Manual (EM) |
| GEK 112862, GEnx-1B Cleaning, Inspection, and Repair Manual (CIR) |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| K. | Interchangeability |
| Two-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: |
|
| (2) | Other Spare Parts: |
| None. |
| (3) | Consumables: |
| None. |
| B. | Industry Support Information |
| None. |
| C. | Configuration Chart |
|
| Operation Codes RE=Replace RM=Remains |
| Change Code 2=Two-way interchangeable. |
| Support Code B=Old parts will be supplied until all old parts are sold. |
| D. | Parts Disposition |
| Use serviceable old parts for engines that have not changed. |
| E. | Tooling - Price and Availability |
| None. |
| 3. | ACCOMPLISHMENT INSTRUCTIONS |
| A. | Removal and Installation |
| (1) | Removal and installation instructions for slab head bolts (1, Figure 1) have not changed. Refer to the GEnx-1B EM, 72-30-00, DISASSEMBLY 002 and ASSEMBLY 001. |
