 | GEnx-1B SERVICE BULLETIN - 72-0308 R01 | Revised: 03/15/2018 |
| SB 72-0308 R01 ENGINE - Heat Shields (72-00-02) - Introduction of New Support Bracket P/N 2692M80P01 | Issued: 04/27/2016 | |
| GEnx-1B SERVICE BULLETIN - 72-0308 R01 | Revised: 03/15/2018 |
| SB 72-0308 R01 ENGINE - Heat Shields (72-00-02) - Introduction of New Support Bracket P/N 2692M80P01 | Issued: 04/27/2016 | |
| 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 (2018) General Electric Company, U.S.A. |
| TRANSMITTAL INFORMATION |
| REVISION 1 TO SERVICE BULLETIN 72-0308 |
| Revision 1 is issued to update paragraphs 1., PLANNING INFORMATION and 2.A., Material - Price and Availability. |
| The original was issued April 27, 2016. Revision bars in the left margin identify changes. |
| 1. | PLANNING INFORMATION |
| A. | Effectivity |
| * * * FOR GEnx-1B64, -1B64/P1, -1B64/P2, -1B67, -1B67/P1, -1B67/P2, -1B70, -1B70/75/P1, -1B70/75/P2, -1B70/P1, -1B70/P2, -1B70C/P1, -1B70C/P2, -1B74/75/P1, -1B74/75/P2 |
| 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 B-sump oil tube hose and the C-sump oil scavenge tube installations are affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin introduces a new scavenge tube support bracket (support bracket) and provides installation instructions. |
| C. | Compliance |
| Category 3 |
| GE recommends that you do this Service Bulletin at the next shop visit of the engine/module. |
| Impact F |
| Implement as deemed necessary per the Service Bulletin Category. |
| 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 parts and improve reliability. |
| (2) | Condition: |
| The B-sump oil tube hose and the C-sump oil scavenge tube have been found worn at the wear sleeves due to contact with the heatshield aft skirt bracket retainers. |
| (3) | Cause: |
| The wearing is caused due to relative motion of the heatshield aft skirts causing direct contact with the B-sump oil tube hose and the C-sump oil scavenge tube at the wear sleeves and sometimes out the wearsleeve. |
| (4) | Improvement: |
| The new support bracket is introduced to prevent heatshield aft skirts displacement and wearing condition on the B-sump oil tube hose and the C-sump oil scavenge tube, thus ensuring the bracket retainers lay on the B-sump oil tube hose and the C-sump oil scavenge tube wearsleeves. |
| (5) | Substantiation: |
| Substantiation is by analysis and 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 B-sump oil tube hose and the C-sump oil scavenge tube location at the aft skirt of the heatshield, you will need approximately 0.5 man-hour for each engine or component. |
| H. | Weight and Balance |
| The complete compliance with this Service Bulletin increases weight by 0.12 lb (0.05 kg). |
| I. | References (Use the latest version of these documents) |
| GEnx-1B, Boeing 787 Aircraft Maintenance Manual (AMM) |
| GEK 9250, Commercial Engine Standard Practices Manual (SPM) |
| 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 |
| Introduce support bracket P/N 2692M80P01 concurrently with the machine bolts P/N AS3237-08 and the removal of bolts AS3237-06. |
| 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 Codes 5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability. |
| Support Codes 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. | General |
| (1) | On wing: |
| (a) | Get access to B-sump oil tube hose and the C-sump oil scavenge tube at the aft skirt heatshield location as follows: |
| 1 | Open the fan cowls. Refer to the GEnx-1B Boeing 787 AMM, TASK B787-A-G71-11-04-00B-540-A. |
| (b) | Remove and discard the machine bolts (1, Figure 1) from the aft skirt heatshield. |
| (c) | Remove two machine bolts (2) from the C sump oil scavenge tube and keep the bolts for later installation. |
| WARNING: |
|
| (d) | Apply C02-019 engine oil or C02-023 engine oil to the new machine bolts (1, Figure 1). |
| (e) | Install the new support bracket (3) with the new bolts (1) to the aft skirt heatshield with machine bolts (2) to the C sump oil scavenge tube flange. Hand tight. |
| (f) | Torque the machine bolts (1) and (2) to 106-124 lb in. (11.9-14.0 Nm). |
| (g) | Close the fan cowls. Refer to the GEnx-1B Boeing 787 AMM, TASK B787-A-G71-11-04-00B-740A-A. |
| (2) | In Shop: |
| (a) | Remove and discard the machine bolts (1, Figure 1) from the aft skirt heatshield. |
| (b) | Remove two machine bolts (2) from the C sump oil scavenge tube and keep the bolts for later installation. |
| WARNING: |
|
| (c) | Apply C02-019 or C02-023 engine oil to the new machine bolts (1, Figure 1). |
| (d) | Install the new support bracket (3) with the new bolts (1) to the aft skirt heatshield and with the machine bolts (2) to the C sump oil scavenge tube flange. Hand tight. |
| (e) | Torque the machine bolts (1) and (2) to 106-124 lb in. (11.9-14.0 Nm). |
