GEnx-2B SERVICE BULLETIN - 73-0090 R02 Revised: 05/20/2021 SB 73-0090 .
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards GEnx-2B SERVICE BULLETIN - 73-0090 R02 SB 73-0090 R02 ENGINE FUEL AND CONTROL - ELECTRONIC ENGINE CONTROL (73-21-20) - REPLACEMENT OF INTEGRATED CIRCUIT MN4 ON MAIN CHANNEL BOARDS Revised: 05/20/2021 Issued: 12/17/2020 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. GE Aviation authorizes the Federal Aviation Administration to incorporate this document by reference in an Airworthiness Directive. Copyright (2021) General Electric Company, U.S.A. TRANSMITTAL INFORMATION REVISION 2 TO SERVICE BULLETIN 73-0090 Revision 2 is issued to update paragraphs 1., PLANNING INFORMATION and 4., APPENDIX A. Revision 1 was issued January 28, 2021. The original was issued December 17, 2020. Revision bars in the left margin identify changes. 1. PLANNING INFORMATION A. Effectivity * * * GEnx-2B67, -2B67B, -2B67/P This Service Bulletin is applicable to all GEnx-2B engines. The electronic engine controls (EECs) VIN 114E9849G1 (P/N 2124M70P02), VIN 114E9849G2 (P/N 2124M70P03), and VIN 114E9849G3 (P/N 2124M70P04) are affected by this Service Bulletin. B. Description This Service Bulletin provides instructions to replace the EEC MN4 bridge ball grid array (BGA) microprocessor. C. Compliance Category 2 GE recommends that you do this Service Bulletin under the following conditions based on the cycles since new (CSN) or cycles since repair (CSR) of the EEC MN4 microprocessors as follows: * Replace the EEC MN4 microprocessor after the MN4 microprocessor reaches 9,900 CSN (soft-time) but before it exceeds 11,000 CSN. * Thereafter, replace the EEC MN4 microprocessors after the MN4 microprocessor reaches 9,900 CSR (soft-time) but before it exceeds 11,000 CSR. NOTE: For the purposes of this Service Bulletin, EEC shop visit is the induction of the EEC into any FADEC International authorized repair shop. NOTE: EEC MN4 microprocessor replacement is limited to a maximum of three replacements for each main channel board (MCB). After three replacements, the MCB will need to be replaced. Impact A Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 1 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards This recommendation is to address a condition that may affect Flight Safety. NOTE: A loss of thrust control (LOTC) may occur. NOTE: This Service Bulletin can be done in shop. 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 operator's fleet. D. Concurrent Requirements None. E. Reason (1) Objective: To rework a part, improve reliability, and reduce significant events. (2) Condition: An LOTC event has occurred due to an EEC MN4 microprocessor solder ball failure. (3) Cause: Accumulated thermal cycles of the EEC with age causes the solder ball to fail. (4) Improvement: The MN4 integrated circuit on the MCB will be removed along with the solder and will be replaced with a new solder and a new BGA. (5) Substantiation: Substantiation 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 Refer to the attached FADEC International Service Bulletin FADEC3/73-093 (latest version). H. Weight and Balance Weight and balance are not changed. I. References (Use the latest version of these documents) GEnx-2B, Boeing 747-8 Aircraft Maintenance Manual (AMM) GEK 114119, GEnx-2B Engine Manual (EM) GEK 114122, GEnx-2B Engine Illustrated Parts Catalog (EIPC) GEK 114021, GEnx-2B Component Maintenance Manual (CMM), 73-23-15 FADEC International Service Bulletin FADEC3/73-093, ENGINE FUEL AND CONTROL ECU Modification - Replacement of MN4 Microprocessor BGA on Main Channel Boards (MCB) J. Publications Affected None. K. Interchangeability Not applicable. L. Software Accomplishment Summary Not applicable. 2. MATERIAL INFORMATION A. Material - Price and Availability (1) Parts necessary to do this Service Bulletin: Refer to the attached FADEC International Service Bulletin FADEC3/73-093 (latest version). (2) Other Spare Parts: None. (3) Consumables: None. B. Industry Support Information Refer to the attached FADEC International Service Bulletin FADEC3/73-093 (latest version). C. Configuration Chart None. D. Parts Disposition None. E. Tooling - Price and Availability Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 2 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards None. 3. ACCOMPLISHMENT INSTRUCTIONS A. General (1) Remove the EEC (Figure 1). Removal instructions have not changed. Refer to the GEnx-2B EM, 72-00-00, DISASSEMBLY 001 or GEnx-2B, Boeing 747-8 AMM, 73-21-05, ELECTRONIC ENGINE CONTROL (EEC) - REMOVAL, TASK 73-21-05-000-801-G00. (2) Send the removed EEC (Figure 1) to FADEC International. Refer to the attached FADEC International Service Bulletin FADEC3/73-093 (latest version). (3) Install the EEC (Figure 1). Installation instructions have not changed. Refer to the GEnx-2B EM, 72-00-00, ASSEMBLY 001 or GEnx-2B, Boeing 747-8 AMM, 73-21-05, ELECTRONIC ENGINE CONTROL (EEC) - INSTALLATION, TASK 73-21-05-400-801-G00. EEC Location Figure 1 4. APPENDIX - A VENDOR SERVICE BULLETIN SUMMARY TABLE Vendor Service Bulletin Title: ENGINE FUEL AND CONTROL - ECU Modification - Replacement of MN4 Microprocessor BGA on Main Channel Boards (MCB) GE Service Bulletin Number: GEnx-2B S/B 73-0090, Revision 2 Supplier Service FADEC3/73-093 Date Printed: 2021/07/09 Vendor: FADEC International GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 3 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Bulletin Number: Category: 2 Vendor CAGE Code: 3E6E4 Component Maintenance Manual (CMM): 73-23-15 CMM CAGE Code: 3E6E4 PARTS AFFECTED New GE Part Number Old GE Part Number New Vendor Part Number Old Vendor Part Number Part Name 2124M70P02 2124M70P02 114E9849G1 114E9849G1 Control, Electronic Engine 2124M70P03 2124M70P03 114E9849G2 114E9849G2 Control, Electronic Engine 2124M70P04 2124M70P04 114E9849G3 114E9849G3 Control, Electronic Engine NOTE: For interchangeability and/or material support, refer to the attached FADEC International Service Bulletin FADEC3/73-093 (latest version). Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 4 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 5 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 6 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 7 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 8 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 9 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 10 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 11 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 12 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 13 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 14 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 15 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 16 of 17
GEnx-2B Service Bulletins (SBs) SB 73-0090 R02 ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Replacement of Integrated Circuit MN4 on Main Channel Boards GE Designated: - CONFIDENTIAL Subject to the restrictions on the media Date Printed: 2021/07/09 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 17 of 17
by this Service Bulletin. B. Description This Service Bulletin provides instructions to replace the EEC MN4 bridge ball grid array (BGA) microprocessor. C. Compliance Category 2 GE recommends that you do this Service Bulletin under the following conditions based on the cycles since new (CSN) or cycles since repair (CSR) of the EEC MN4
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"KB", or "XB" mark already complied with this Service Bulletin. B. Description This Service Bulletin provides instructions to identify and replace the fuel manifold listed in paragraph 1.A., Effectivity. 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
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technical service bulletin . page 1 of 2. this is a replacement technical . september 23, 2019 . . o customer service service bulletin and supersedes the original technical service bulletin number 225- 1025. you must have this technical service bulletin 225-v21025 completed.
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Notify GE Aviation of any HPT stage 2 disks that do not pass the immersion ultrasonic inspection. E. Tooling - Price and Availability None. 3. ACCOMPLISHMENT INSTRUCTIONS A. HPT Stage 2 Disk Removal (1) Remove the HPT stage 2 disk (Figure 1) from the H
ANSI A300 (Part 7), approved by industry consensus in 2006, contains many elements needed for an effective TVMP as required by this Standard. One key element is the “wire zone – border zone” concept. Supported by over 50 years of continuous research, wire zone – border zone is a proven method to manage vegetation on transmission rights-of-ways and is an industry accepted best practice .
