 | GEnx-1B SERVICE BULLETIN - 72-0176 R00 | Revised: 08/12/2013 |
| SB 72-0176 R00 ENGINE - Lower Bifurcation Assembly (72-00-03) - Introduction of New Harness Support Bracket for W09 Harness | Issued: 08/12/2013 | |
| GEnx-1B SERVICE BULLETIN - 72-0176 R00 | Revised: 08/12/2013 |
| SB 72-0176 R00 ENGINE - Lower Bifurcation Assembly (72-00-03) - Introduction of New Harness Support Bracket for W09 Harness | Issued: 08/12/2013 | |
| 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 (2013) General Electric Company, U.S.A. |
| 1. | PLANNING INFORMATION |
| A. | Effectivity |
|
| This Service Bulletin is applicable to all GEnx-1B engines. |
| This Service Bulletin has been introduced in production to these GEnx-1B engines: |
| • |
|
| These serial numbers are the best available data. |
| The machine bolt P/N AS3237-10 and machine bolt P/N AS3237-08 are affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin introduces a new harness support bracket P/N 2509M91G01 and changes two machine bolt sizes from P/N AS3237-08ito P/N AS3237-10 on the lower bifurcation module. |
| C. | Compliance |
| Category 7 |
| GE recommends that you do this Service Bulletin at customer's convenience or option. |
| NOTE: |
|
| D. | Concurrent Requirements |
| None. |
| E. | Reason |
| (1) | Objective: |
| To introduce a new part and improve maintainability. |
| (2) | Condition: |
| The installation methods and type of components involved make it difficult to maintain the harness route as design intended, having the potential of the flexible harness being too close to the lower bifurcation panel edge. |
| (3) | Cause: |
| Close clearance exists between the W09 harness and the lower bifurcation right shield panel at the top of the lower bifurcation assembly. |
| (4) | Improvement: |
| The proposed harness support bracket will maintain the clearance between involved components without affecting the structural integrity of the lower bifurcation assembly. |
| (5) | Substantiation: |
| Substantiation is by analysis. |
| F. | Approval |
| This Service Bulletin has been reviewed by the FAA and the repair(s) and modification(s) herein comply with the applicable Federal Aviation Regulations and are FAA APPROVED for installation in the model(s) listed in this Service Bulletin. |
| G. | Manpower |
| After you get access to the lower bifurcation assembly, you will need approximately 0.5 man-hour to do the replacement portion of this Service Bulletin. |
| H. | Weight and Balance |
| Weight and balance are not changed. |
| I. | References (Use the latest version of these documents) |
| GEK 9250, Commercial Engine Standard Practices Manual (SPM) |
| GEK 112851, GEnx-1B Engine Manual (EM) |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| GEnx-1B Boeing 787 Aircraft Maintenance Manual (AMM) |
| NOTE: |
|
| J. | Publications Affected |
| GEK 112851, GEnx-1B Engine Manual (EM) |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| GEnx-1B Boeing 787 Aircraft Maintenance Manual (AMM) |
| K. | Interchangeability |
| The new harness support bracket and machine bolts will be introduced at the same time. Mixing the proposed and superseded configuration on the same engine is not permitted. |
| L. | Software Accomplishment Summary |
| Not applicable. |
| 2. | MATERIAL INFORMATION |
| A. | Material - Price and Availability |
| (1) | Parts necessary to do this Service Bulletin: |
|
| *Part not supplied by GE Engine Services Distribution L.L.C. Procure through local purchase. |
| NP = Not Provisioned |
| NOTE: |
|
| (2) | Other Spare Parts: |
| None. |
| (3) | Consumables: |
|
| B. | Industry Support Information |
| None. |
| C. | Configuration Chart |
|
| Operation Codes AD=Add RM=Remains QTC=Quantity change |
| Change Code 5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability. |
| Support Code E=Old parts will be supplied, and can be used at other engine locations. |
| D. | Parts Disposition |
| Use serviceable old parts at other engine locations. |
| E. | Tooling - Price and Availability |
| None. |
| 3. | ACCOMPLISHMENT INSTRUCTIONS |
| A. | Disassembly |
| (1) | Remove two machine bolts (01-310, 72-00-03) that attach the lower bifurcation support bracket (support bracket) (01-090, 72-00-03) to the lower bifurcation drain manifold (drain manifold) (01-020, 72-00-03). |
| (2) | Discard the two removed machine bolts (01-310, 72-00-03). |
| B. | Assembly |
| (1) | Install the new harness support bracket. Refer to Figure 1 and do as follows: |
| WARNING: |
|
| (a) | Apply C02-019 engine oil or C02-023 engine oil to the threads of the new two machine bolts (2, Figure 1). |
| (b) | Align the air and VFSG oil lower manifold (manifold) (01-010, 72-00-03) with the lower bifurcation drain manifold (drain manifold) (01-020, 72-00-03) for installation. Refer to the GEnx-1B EM, 72-00-03, ASSEMBLY 001, Subtask 72-00-03-440-029, except as follows: |
| 1 | Align the harness support bracket (1, Figure 1) on the drain manifold (01-020, 72-00-03) and the support bracket (01-090, 72-00-03). |
| 2 | Attach the harness support bracket (1) to the drain manifold (01-020, 72-00-03) and the support bracket (01-090, 72-00-03) with two machine bolts (2). |
| 3 | Torque the two machine bolts to 106-124 lb in. (12.0-14.0 N.m). |
| (c) | Attach the W09 harness to the harness support bracket (1). Refer to the GEnx-1B EM, 72-00-00, ASSEMBLY 001, Subtask 72-00-00-440-012. |
