 | GEnx-1B SERVICE BULLETIN - 72-0422 R00 | Revised: 09/07/2018 |
| SB 72-0422 R00 ENGINE - Fan Booster Assembly (72-22-00) - Introduction of New Bolts for Vane Assemblies | Issued: 09/07/2018 | |
| GEnx-1B SERVICE BULLETIN - 72-0422 R00 | Revised: 09/07/2018 |
| SB 72-0422 R00 ENGINE - Fan Booster Assembly (72-22-00) - Introduction of New Bolts for Vane Assemblies | Issued: 09/07/2018 | |
| 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. |
| 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, -1B76A/P2 |
| This Service Bulletin is applicable to these GEnx-1B engines: |
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| This Service Bulletin has been introduced in production to these GEnx-1B engines: |
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| These serial numbers are the best available data. |
| The double hexagon head shear bolt (bolt) P/N J814P009A is affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin introduces a new bolt P/N J814P006A to the fan booster assembly. |
| C. | Compliance |
| Category 5 |
| GE recommends that you do this Service Bulletin as soon as the affected bolt is removed from the engine. |
| Impact E |
| This recommendation is to improve the cost of ownership, reduce maintenance requirements or is a product improvement. |
| NOTE: |
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| 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 a new part. |
| (2) | Condition: |
| With the old bolt P/N J814P009A installed, it is possible that the flange clamp load may be insufficient and could lead to relative flange motion and excessive wear. |
| (3) | Cause: |
| With the old bolt P/N J814P009A installed, the joint meets technical requirements. It is possible, however, that the flange clamp load may be insufficient and could lead to relative flange motion and excessive wear when disassembled and re-assembled in the shop under worst-case stack. |
| (4) | Improvement: |
| The new bolt P/N J814P006A is 0.063 inch (1.60 mm) longer in total length and has a shorter barrel by 0.062 inch (1.57 mm) relative to the old bolt P/N J814P009A, which permits full flange clamp load to be achieved and gives as result a properly clamped flange. |
| (5) | Substantiation: |
| Substantiation is by comparative analysis and analysis. |
| F. | Approval |
| The data contained in this Service Bulletin has been reviewed by the FAA or authorized entity representing the FAA 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 |
| 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 0.218 lb (0.099 kg). |
| I. | References (Use the latest version of these documents) |
| GEK 112851, GEnx-1B Engine Manual (EM) |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| NOTE: |
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| J. | Publications Affected |
| GEK 112851, GEnx-1B Engine Manual (EM) |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| K. | Interchangeability |
| One-way interchangeable. |
| L. | Software Accomplishment Summary |
| Not applicable. |
| 2. | MATERIAL INFORMATION |
| A. | Material - Price and Availability |
| (1) | Parts necessary to do this Service Bulletin: |
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| NOTE: |
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| (2) | Other Spare Parts: |
| None. |
| (3) | Consumables: |
| None. |
| B. | Industry Support Information |
| Parts are available to affected customers at no charge (241 bolts equal to one set of hardware per engine). To be eligible for this support, the affected operator (or the operator's overhaul shop representative) must place a no-charge purchase order for replacement hardware to GE Aviation Spare Parts through their Customer Account Manager (CAM) with reference to Customer Dispensation D-0165. GE Aviation will not provide a back-end spare parts credit for locally procured hardware or hardware ordered on a standard purchase order. |
| This support is available until December 31, 2022. All no-charge purchase orders must have the following information: |
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| The support offered in this Service Bulletin is contingent on the customer having an active general terms agreement (GTA) for the applicable GEnx engine model. This offer may not be assigned or otherwise transferred to any other party without the written consent of GE, which consent shall be in the sole and complete discretion of GE. The offer is extended to the customer based on unique facts and circumstances, which the customer hereby acknowledges to be a non-precedent setting between the customer and GE. The commitment is subject to the terms and conditions of the current GTA between the customer and GE for the applicable GE engine model. By accepting the support listed in this section as offered by GE, the customer agrees that the Service Bulletin offering satisfies customers commercial needs. The remaining terms and conditions of the customers GTA are applicable and remain in effect. |
| Please contact your Customer Support Manager (CSM) with any questions regarding this support. |
| C. | Configuration Chart |
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| Operation Codes RE=Replace RM=Remains RW=Rework |
| Change Codes 1=One-way interchangeable. |
| 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 |
| Use serviceable old parts at other engine locations. |
| E. | Tooling - Price and Availability |
| None. |
| 3. | ACCOMPLISHMENT INSTRUCTIONS |
| A. | General |
| (1) | Removal and installation instructions of the bolts (1, 2, and 3, Figure 1) have not changed. Refer to the GEnx-1B EM, 72-22-00, DISASSEMBLY 001 and ASSEMBLY 001, CONFIG 01 or CONFIG 02. |
