 | GEnx-1B SERVICE BULLETIN - 73-0044 R00 | Revised: 07/01/2015 |
| SB 73-0044 R00 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Release of EEC Software Version B185 | Issued: 07/01/2015 | |
| GEnx-1B SERVICE BULLETIN - 73-0044 R00 | Revised: 07/01/2015 |
| SB 73-0044 R00 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Release of EEC Software Version B185 | Issued: 07/01/2015 | |
| 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 (2015) General Electric Company, U.S.A. |
| 1. | PLANNING INFORMATION |
| A. | Effectivity |
|
| This Service Bulletin is applicable to all GEnx-1B engines. |
| The electronic engine control (EEC) kits P/N 738L357G08, P/N 738L357G09, P/N 738L357G10, P/N 738L357G11, P/N 738L357G15, P/N 738L357G19, P/N 738L357G20, P/N 738L357G21, P/N 738L357G22, EECs VIN 114E9586G8 (P/N 2121M82P06), VIN 114E9586G11 (P/N 2121M82P07), VIN 114E9586G10 (P/N 2447M85P01), VIN 114E9586G12 (P/N 2447M85P02), and software P/N 2124M23P13, P/N 2124M23P14, P/N 2124M23P16, P/N 2124M23P18, P/N 2124M23P19, and P/N 2124M23P20 are affected by this Service Bulletin. |
| B. | Description |
| This Service Bulletin releases new software P/N 2124M23P21 and EEC kit P/N 738L357G23. In addition, this Service Bulletin also provides EEC reprogramming procedures. |
| C. | Compliance |
| Category 2 |
| GE recommends that you do this Service Bulletin as soon as possible without effect on revenue service but before 60 days from the issue date of the Service Bulletin. |
| NOTE: |
|
| 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. |
| (2) | Condition: |
| Improvements to the EEC software have been identified. |
| (3) | Cause: |
| Revenue service experience has identified opportunities for EEC software improvements. |
| (4) | Improvement: |
| The following changes are included in EEC software version B185: |
| Enhanced ice crystal icing (ICI) detection and accommodation based on lessons learned from engineering tests and analysis of ICI encounter data. |
| Improved combustor dynamics mitigation fuel scheduling logic for increased combustor durability. |
| Implemented various improvements to EEC logic driving engine indicating and crew alerting system (EICAS) messages, EEC signal processing (ISP), and maintenance functions: |
| • |
|
| • |
|
| • |
|
| • |
|
| • |
|
| • |
|
| • |
|
| Modified fuel scheduling for improved off-idle operability margin for GEnx-1B/P2 engines. |
| Introduced a GEnx-1B/P2 fan speed (N1) modifier to minimize thrust vs speed errors, based on production test data. |
| Improved the EEC power management lock and lapse function assumed temperature tables to optimize match to the airplane N1 takeoff targets for certain engine ratings. |
| Revised engine ACARS engine condition monitoring report triggering to reduce variation in engine oil level data and also to account for transient bleed valve (TBV) transition effects on peak EGT data during takeoff. |
| Added provisional logic to allow the GEnx-1B and GEnx-1B/P1 configuration cast fuel metering unit (FMU) to be installed and operated on GEnx-1B/P2 engines. |
| Incorporated improvements to facilitate engine test cell operation, address minor development test findings and to non-functional and documentation issues. |
| (5) | Substantiation: |
| Substantiation is by analysis and test. |
| 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 EEC, you will need approximately 1.0 man-hour for each engine or component. |
| 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 114001, GEnx-1B Component Maintenance Manual (CMM) 73-21-50 |
| GEnx-1B Boeing 787 Aircraft Maintenance Manual (AMM) |
| GEnx-1B S/B 73-0030, ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Release of EEC Software Version B175 |
| GEnx-1B S/B 73-0034, ENGINE FUEL AND CONTROL - Electronic Engine Control (EEC) (73-21-20) - Introduction of New EEC Configuration with Improved Fuel Flow Signal Circuitry |
| GEnx-1B S/B 73-0042, ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Release of EEC Software Version B180 |
| NOTE: |
|
| J. | Publications Affected |
| GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC) |
| K. | Interchangeability |
| One-way interchangeable. |
| NOTE: |
|
| L. | Software Accomplishment Summary |
| Not applicable. |
| 2. | MATERIAL INFORMATION |
| A. | Material - Price and Availability |
| (1) | Parts necessary to do this Service Bulletin: |
|
| NP = Not Provisioned |
| *Part not supplied by GE Engine Services Distribution L.L.C. To procure parts, contact the following: |
| FADEC International C/O BAE Systems Controls ATTN: Manager Spare Parts Sales P.O. Box 2232 Fort Wayne, IN 46801-2232 U.S.A. |
| Phone: (260) 434-5664 Fax: (260) 434-5616 |
| NOTE: |
|
| NOTE: |
|
| (2) | Other Spare Parts: |
|
| NP = Not Provisioned |
| *Part not supplied by GE Engine Services Distribution L.L.C. To procure parts, contact the following: |
| FADEC International C/O BAE Systems Controls ATTN: Manager Spare Parts Sales P.O. Box 2232 Fort Wayne, IN 46801-2232 U.S.A. |
| Phone: (260) 434-5664 Fax: (260) 434-5616 |
| (3) | Consumables: |
| None. |
| B. | Industry Support Information |
| None. |
| C. | Configuration Chart |
|
| Operation Codes RM=Remains RW=Rework SU=Superseded |
| Change Code 1=One-way interchangeable. |
| Support Code A=Old parts will no longer be supplied. |
| D. | Parts Disposition |
| Rework. |
| E. | Tooling - Price and Availability |
|
| NOTE: |
|
| (1) | Operators performing the EEC software reprogramming procedure must request the following master CD-ROM from BAE Systems Controls Product Support Engineering: |
|
| NOTE: |
|
| 3. | ACCOMPLISHMENT INSTRUCTIONS |
| A. | General |
| (1) | EEC on-board flight deck reprogramming procedure: |
| (a) | Start the on-board loadable software (LSAP). Refer to the GEnx-1B Boeing 787 AMM, TASK DMC-B787-A-45-13-00-02A-110B-A, Start the Onboard Data Load Function - Software Operation. |
| (b) | Load the software to the EEC. Refer to the GEnx-1B Boeing 787 AMM, TASK DMC-B787-A-G73-21-05-00B-750A-A, Electronic Engine Control (with Onboard Data Load Function) - Software Installation. |
| (c) | Start the CMC. Refer to the GEnx-1B Boeing 787 AMM, TASK DMC-B787-A-45-11-00-00A-110B-A, Central Maintenance Computing Function - Software Operation. |
| (d) | Examine the software configuration. Refer to the GEnx-1B Boeing 787 AMM, TASK DMC-B787-A-45-11-00-02A-300D-A, Airplane Component with Loadable Software - Software Check. |
| NOTE: |
|
| NOTE: |
|
| (2) | Engine shop reprogramming and verification procedure: |
| (a) | Prepare a 615 working copy disk of the software. Refer to the instructions embedded on CD-ROM P/N 362A9836P14. |
| (b) | Reprogram the EEC with the PDL reprogramming disk working
copy. Refer to the GEnx-1B EM, 72-00-00, SPECIAL PROCEDURE 001 and
paragraph 4., APPENDIX A - EEC REPROGRAMMING
AND NVM RETRIEVAL. |
| (3) | EEC shop reprogramming and verification procedure: |
| (a) | Prepare a 615 working copy disk of the software. Refer to the instructions embedded on CD-ROM P/N 362A9836P14. |
| (b) | Reprogram the EEC with the PDL reprogramming disk working
copy. Refer to the GEnx-1B CMM, 73-21-50,
APPENDIX A - EEC REPROGRAMMING AND NVM RETRIEVAL and paragraph 4., APPENDIX A - EEC REPROGRAMMING AND NVM RETRIEVAL . |
| 4. | APPENDIX A - EEC REPROGRAMMING AND NVM RETRIEVAL |
| EEC/GSE Software Configuration |
| GE Software Part Number: 2124M23P21 |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||