 | GEnx-1B SERVICE BULLETIN - 72-0203 R01 | Revised: 07/08/2014 |
| SB 72-0203 R01 ENGINE - General (72-00-00) - Pylon Drain Boot Fit Improvement | Issued: 05/12/2014 | |
| GEnx-1B SERVICE BULLETIN - 72-0203 R01 | Revised: 07/08/2014 |
| SB 72-0203 R01 ENGINE - General (72-00-00) - Pylon Drain Boot Fit Improvement | Issued: 05/12/2014 | |
| 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 (2014) General Electric Company, U.S.A. |
| TRANSMITTAL INFORMATION |
| REVISION 1 TO SERVICE BULLETIN 72-0203 |
| Revision 1 is issued to update paragraphs 1., PLANNING INFORMATION , 2.A., Material - Price and Availability , and 3.,ACCOMPLISHMENT INSTRUCTIONS . |
| The original was issued May 12, 2014. Revision bars in the left margin identify changes. |
| 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 engine build unit (EBU) Boeing kit P/N 738L170G03 is affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin releases new hose clamps P/N 1519M13P04 and P/N 1519M13P06, top pylon drain boot P/N ER6403P01, and bottom pylon drain boot P/N ER6404P01. |
| C. | Compliance |
| Category 7 |
| GE recommends that you do this Service Bulletin at customer's convenience. |
| NOTE: |
|
| D. | Concurrent Requirements |
| None. |
| E. | Reason |
| (1) | Objective: |
| To introduce new parts and improve reliability. |
| (2) | Condition: |
| The current connection points of the fuel, hydraulic, and drain lines present gaps that reduce the effectiveness to contain leaks and sprays. |
| (3) | Cause: |
| The current assembly does not have hose clamps around the fluid lines to support leakage prevention. |
| (4) | Improvement: |
| Improvement consists of the elimination of the gaps between the top and bottom pylon drain boots and the fluid lines by adding hose clamps at the lines and new designed top and bottom pylon drain boots. |
| (5) | Substantiation: |
| Substantiation is by 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 increases weight by 0.97 lb (0.44 kg). |
| I. | References (Use the latest version of these documents) |
| 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. The new top and bottom pylon drain boots and new hose clamps must be introduced as a complete set. |
| L. | Software Accomplishment Summary |
| Not applicable. |
| 2. | MATERIAL INFORMATION |
| A. | Material - Price and Availability |
| (1) | Parts necessary to do this Service Bulletin: |
|
| *Parts not supplied by GE Engine Services Distribution L.L.C. To procure parts, contact the following: |
|
| NP = Not Provisioned |
| NOTE: |
|
| (2) | Other Spare Parts: |
| None. |
| (3) | Consumables: |
| None. |
| B. | Industry Support Information |
| None. |
| C. | Configuration Chart |
| Operation Codes AD=Add QTC=Quantity Change RE=Replace RM=Remains RW=Rework |
| 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 |
| None. |
| E. | Tooling - Price and Availability |
| None. |
| 3. | ACCOMPLISHMENT INSTRUCTIONS |
| A. | Removal of the Old Hose Clamp and Top and Bottom Pylon Drain Boots. |
| (1) | Remove the old hose clamp (30-020, 71-00-00), top pylon drain boot (30-040), and bottom pylon drain boot (30-050) as follows: |
| (a) | Remove the old hose clamp (30-020). Discard the old hose clamp. |
| (b) | Loosen and remove the two double hexagonal head machine bolts (bolts) (30-010) that attach the top and bottom pylon drain boots. |
| (c) | Remove the hydraulic pressure tube (tube) (05-030) and hydraulic case tube (tube) (05-110) from the bottom pylon drain boot (30-050). |
| (d) | Put the protective covers at each end of the tubes hydraulic. |
| (e) | Remove the hydraulic supply tube (tube) (05-070) from the bottom pylon drain boot (30-050). |
| (f) | Put a protective cover at the end of the tube (05-070). |
| (g) | Remove the hose clamp (30-030) to remove the main fuel tube hose (tube) (01-010, 73-11-40) from the bottom pylon drain boot. |
| (h) | Remove the strut drain hose tube (25-010A, 73-11-43) from the bottom pylon drain boot. |
| (i) | Remove the old top pylon drain boot (30-040, 71-00-00) and bottom pylon drain boot (30-050). Discard the two halves. |
| B. | Installation of the New Hose Clamps and Top and Bottom Pylon Drain Boots. |
| (1) | Install the new hose clamps (3, Figure 1) and (4, Figure 1) and the new pylon drain boots (1, Figure 1) and (2, Figure 1) as follows: |
| (a) | Put the new bottom pylon drain boot (2, Figure 1) above the compressor section. |
| (b) | Remove the protective cover from the end of the tubes (05-030, 71-00-00), (05-070), and (05-110). |
| (c) | Put the upper ends of the three tubes into the bottom pylon drain boot as follows: |
| 1 | Put the tube (05-030) in the forward recess of the bottom pylon drain boot. |
| 2 | Put the tube (05-070) in the next forward recess of the bottom pylon drain boot. |
| 3 | Put the tube (05-110) in the center recess of the bottom pylon drain boot. |
| (d) | Put the main fuel tube hose (01-010, 73-11-40) into the bottom pylon drain boot. |
| (e) | Put the strut drain hose tube (25-010A, 73-11-43) into the bottom pylon drain boot. |
| (f) | Put the new top pylon drain boot (1, Figure 1) on the bottom pylon drain boot (2, Figure 1) and three tubes. |
| (g) | Install the two bolts (30-010, 71-00-00) and torque them to 35 lb in. (4.0 N.m). |
| (h) | Install the new hose clamps ( 3, Figure 1), (4, Figure 1) and (30-030) to firmly attach the bottom and top pylon drain boots. Torque them to 7 lb in. (0.8 N.m). |
