 | GEnx-1B SERVICE BULLETIN - 72-0532 R00 | Revised: 10/19/2023 |
| SB 72-0532 R00 ENGINE - Combustor Diffuser Assembly (72-41-00) - Introduction of New Key Locked Insert and Key Locked Oversized Insert for Combustor Case | Issued: 10/19/2023 | |
| GEnx-1B SERVICE BULLETIN - 72-0532 R00 | Revised: 10/19/2023 |
| SB 72-0532 R00 ENGINE - Combustor Diffuser Assembly (72-41-00) - Introduction of New Key Locked Insert and Key Locked Oversized Insert for Combustor Case | Issued: 10/19/2023 | |
| GE Designated: -CONFIDENTIAL- | |
| 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 part. | |
| This technical data is considered subject to the Export Administration Regulations (EAR) pursuant to 15 CFR Parts 730-774. Transfer of this data by any means to a Non-U.S. 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 (2023) 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, -1B76/P2, -1B76A/P2 |
| This Service Bulletin is applicable to any field GEnx-1B engine with a combustor case listed below that has non-serviceable thread holes. |
| The combustor cases P/N 2303M23G11, P/N 2303M23G19 , P/N 2303M23G20, P/N 2303M23G21, P/N 2303M23G23, and P/N 2303M23G25 are affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin introduces a new free-running key locked Inco718 screw thread insert (key locked insert) P/N J1500P104 and a new free-running key locked Inco718 screw thread oversized insert (key locked oversized insert) P/N J1501P104 to the affected combustor cases. |
| Also, this Service Bulletin provides instructions to repair the affected combustor cases by the machining of the fuel nozzle and/or igniter plug adapter pads threaded holes and installation of new key locked inserts P/N J1500P104 and/or key locked oversized inserts P/N J1501P104 as specified in paragraph 3., ACCOMPLISHMENT INSTRUCTIONS. |
| C. | Compliance |
| Category 7 |
| GE recommends that you do this Service Bulletin at customer's convenience. |
| Impact E |
| This recommendation is to improve the cost of ownership, reduce maintenance requirements or is a product improvement. |
| NOTE: |
|
| NOTE: |
|
| D. | Concurrent Requirements |
| Do GEnx-1B S/B 73-0103 when you do this Service Bulletin. |
| E. | Reason |
| (1) | Objective: |
| To introduce new parts. |
| (2) | Condition: |
| Maintainability issues during removal of the free-running thin wall insert, screw insert with locking ring, and locking ring and key locked Inconel 718 self-locking screw thread insert, which cause damage to the combustor case threaded hole. |
| (3) | Cause: |
| The free-running thin wall insert, screw insert with locking ring, and locking ring and key locked Inconel 718 self-locking screw thread insert can get seized due to a high initial running torque on the assembly. |
| (4) | Improvement: |
| This Service Bulletin introduces a new key locked insert and key locked oversized insert that have bigger outer diameter and allows for field repair of the affected combustor cases. The field repair is to machine the combustor case threaded hole and install a new key locked insert. |
| (5) | Substantiation: |
| Substantiation is by 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 |
| Weight and balance are not changed. |
| 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) |
| GEK 112862, GEnx-1B Cleaning, Inspection, and Repair Manual (CIR) |
| GEnx-1B S/B 73-0103, ENGINE FUEL AND CONTROL - Fuel Injection Nozzles (73-11-30) - In-Shop Fuel Nozzle Machine Bolt Replacement with Safety Cable Installation |
| 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 |
| Qualified interchangeability. |
| The old combustor case and repaired combustor case are two-way interchangeable. |
| The old free-running thin wall insert and locking ring P/N J1484P08 and the new key locked insert P/N J1500P104 and/or key locked oversized insert P/N J1501P104 are one-way interchangeable. |
| The old locking ring P/N 1689M74P08 with screw insert P/N 1693M83P15 and the new key locked inserts P/N J1500P104 and/or key locked oversized inserts P/N J1501P104 are one-way interchangeable. |
| The old key locked inserts P/N J1500P104 and the new key locked oversized insert P/N J1501P104 are one-way interchangeable. |
| The old key locked Inconel 718 self-locking screw thread inserts P/N J1466P04 and the new key locked oversized insert P/N J1501P104 are one-way interchangeable. |
| The repaired combustor case requires mandatory installation of machine bolts with safety cable/wire in accordance with GEnx-1B S/B 73-0103. Refer to paragraph 1.D., Concurrent Requirements. |
| 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: |
| None. |
| B. | Industry Support Information |
| None. |
| C. | Configuration Chart |
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| Operation Codes AD=Add QTC=Quantity Change RM=Remains |
| Change Codes 5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability. |
| Support Codes None. |
| D. | Parts Disposition |
| Discard old parts. |
| E. | Tooling - Price and Availability |
| None. |
| 3. | ACCOMPLISHMENT INSTRUCTIONS |
| A. | Removal |
| (1) | Disassemble the combustor diffuser assembly (Figure 1) as necessary. Disassembly instructions have not changed. Refer to the GEnx-1B EM, 72-41-00, DISASSEMBLY 001, CONFIG 01 or CONFIG 02. |
| B. | Repair |
| (1) | Repair the affected combustor case (1, Figure 2) as follows: |
| (a) | Increase the size of the fuel nozzle and/or igniter plug adapter pads threaded holes and install a new key locked insert and/or key locked oversized insert (2) into the fuel nozzle and/or igniter plug adapter pads threaded holes. Refer to GEnx-1B CIR, 72-41-01, REPAIR 001. |
| C. | Installation |
| (1) | Assemble the affected combustor diffuser assembly (Figure 1). Refer to the GEnx-1B EM, 72-41-00, ASSEMBLY 001, CONFIG 01 or CONFIG 02. |
