 | GEnx-1B SERVICE BULLETIN - 79-0007 R02 | Revised: 01/12/2017 |
| SB 79-0007 R02 OIL - No. 4 Bearing Oil Vent Tubes (79-22-30) - Introduction of the Oil Vent Manifold | Issued: 07/20/2012 | |
| GEnx-1B SERVICE BULLETIN - 79-0007 R02 | Revised: 01/12/2017 |
| SB 79-0007 R02 OIL - No. 4 Bearing Oil Vent Tubes (79-22-30) - Introduction of the Oil Vent Manifold | Issued: 07/20/2012 | |
| 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 79-0007 |
| Revision 2 is issued to update paragraphs 1.A., Effectivity and 2.C., Configuration Chart. |
| Revision 1 was issued April 21, 2014. The original was issued July 20, 2012. Revision bars in the left margin identify changes. |
| 1. | PLANNING INFORMATION |
| A. | Effectivity |
|
| This Service Bulletin is applicable to all GEnx-1B, GEnx-PIP1 and GEnx- PIP2 engines. |
| This Service Bulletin will be introduced on 2nd Q 2012. |
| The oil vent manifold P/N 2378M31G01 is affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin releases an improved oil vent manifold P/N 2506M09G01 for production and provides instructions to install the new parts. |
| C. | Compliance |
| Category 3 |
| GE recommends that you do this Service Bulletin at the next shop visit of the engine/module. |
| 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 new part, improve maintainability, and reduce weight. |
| (2) | Condition: |
| The turbine center frame (TCF) vent strut tubes were damaged by incorrect installation of vent oil manifold when the flange protrusion was inserted into the mating strut tube hole during development testing. |
| (3) | Cause: |
| The shorter protrusion was intended to help in the manifold installation. Installation was particularly difficult, which has no additional flange in the circumferential run. |
| (4) | Improvement: |
| The removal of the four machine bolts P/N AS3237-14 of the oil vent manifold reduces tangential tolerance stack up of the triangular flange attached to TCF strut. |
| (5) | Substantiation: |
| Substantiation is by analysis and comparative 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 |
| No additional man-hours are required to comply with this Service Bulletin. |
| H. | Weight and Balance |
| The complete compliance with this Service Bulletin decreases weight by 0.67 lb (0.30 kg). |
| I. | References (Use the latest version of these documents) |
| GEK 112851, GEnx-1B Engine Manual |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| NOTE: |
|
| J. | Publications Affected |
| GEK 112851, GEnx-1B Engine Manual |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| K. | Interchangeability |
| All parts introduced need to be introduced as an engine set. |
| 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: |
|
| B. | Industry Support Information |
| None. |
| C. | Configuration Chart |
|
| Operation Codes DE=Delete QTC=Quantity Change RE=Replace RM=Remains |
| Change Codes 5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability. |
| Support Codes A=Old parts will no longer be supplied. E=Old parts will be supplied, and can be used at other engine locations. |
| D. | Parts Disposition |
| Discard old parts. |
| E. | Tooling - Price and Availability |
| None. |
| 3. | ACCOMPLISHMENT INSTRUCTIONS |
| A. | Removal |
| (1) | Removal instructions of the oil vent manifolds (1, 6, and 05-150, 79-22-30, Figure 1) have not changed. Refer to the GEnx-1B EM, 72-00-02, DISASSEMBLY 002, Subtask 72-00-02-030-429. |
| B. | Installation |
| (1) | Install the insulation blankets in the oil vent manifold (1, Figure 1) as follows: |
| (a) | Install the insulation blanket (2) and insulation blanket (3) on the oil vent manifold (1). |
| (b) | Attach the insulation blankets (2 and 3) with the tiedown straps (straps) (05-170, 79-22-30). Align the ends of the straps. |
| (c) | Install the insulation blanket (05-240) and insulation blanket (05-250) on the oil vent manifold (1). Attach the insulation blankets with straps (05-170). |
| (d) | Install the insulation blanket (05-220) and insulation blanket (05-230) on the oil vent manifold (1). Attach the insulation blankets with straps (05-170). |
| (e) | Install the insulation blanket (05-200) and insulation blanket (05-210) on the oil vent manifold (1). Attach the insulation blankets with a strap (05-170). |
| (f) | Install the insulation blanket (4) and insulation blanket (5) on the oil vent manifold (1). Attach the insulation blankets with straps (05-170). |
| (2) | Install the oil vent manifold (1) on the TCF vent tube (01-570, 72-54-00) as follows: |
| WARNING: |
|
| (a) | Apply C02-019 engine oil or C02-023 engine oil to the outer seal (05-351, 79-22-30). |
| (b) | Put the outer seal (05-351) on the oil vent manifold (1). |
| (c) | Put the oil vent manifold (1) and outer seal (05-351) on the TCF vent tube (01-570, 72-54-00). |
| (d) | Attach the oil vent manifold (1) to the TCF vent tube (01-570) with bolts (05-340, 79-22-30), support bracket (05-361), and nuts (05-050). |
| (e) | Torque the nuts (05-050) on the oil vent manifold (1) to 106-124 lb in. (12.0-14.0 N.m). |
| (3) | Install the oil vent tube (05-150) on the oil vent manifold (1). Refer to the GEnx-1B EM, 72-00-02, ASSEMBLY 005, Subtask 72-00-02-440-187. |
