Service Information: CFM International
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Table of Contents
Engine Shop Manuals: CFM56-7 Series LEAP Series
Life Limits Manuals: LEAP Series
Messages: CFM56-7 Series
Service Bulletins: CFM56-2 Series CFM56-3 Series CFM56-5 Series CFM56-7 Series LEAP Series
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| ESM | 57 | en | CFM56-7B | 01/15/2018 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| LEAP-1B-05-21-03-01A-281B-C (para 6B) |
Iss 2 | en | High Pressure Turbine Rotor Parts - Mandatory Inspections | 01/09/2020 |
| LEAP-1B-05-29-00-01A-281B-C (para 6B) |
en | Mandatory Maintenance Practices - Mandatory Inspections | 01/09/2020 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| LEAP-1A-05-11-02-01A-0B1B-C | Iss 010-00 | en | High Pressure Compressor Rotor | 09/15/2021 |
| LEAP-1A-05-11-03-01A-0B1B-C | Iss 007-00 | en | High Pressure Turbine Rotor | 09/15/2021 |
| LEAP-1A-05-11-04-01A-0B1B-C | Iss 010-00 | en | Low Pressure Turbine Rotor | 02/15/2022 |
| LEAP-1B-05-11-02-01A-0B1B-C | Iss 010-00 | en | High Pressure Compressor Rotor | 03/17/2022 |
| LEAP-1B-05-11-03-01A-0B1B-C | Iss 007-00 | en | High Pressure Turbine Rotor | 03/17/2022 |
| LEAP-1B-05-11-04-01A-0B1B-C | Iss 008-00 | en | Low Pressure Turbine Rotor | 02/16/2022 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| Mess 98/CFM/312R1 | en | CFM56-7B: Auto Acceleration Events | 08/28/1998 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SB 72-338 | en | CFM56-2A: Engine - Low Pressure Turbine Assembly - Reidentification of LPT Conical Supports and LPT Stub Shafts | 11/25/1993 | |
| SB 72-419 | 2 | en | CFM56-2A: Engine - High Pressure Turbine Rotor - One Time Accelerated Eddy Current Inspection of the Disk Rim Bolt Holes | 11/14/1997 |
| SB 72-470 | en | CFM56-2A: Engine - High Pressure Turbine Rotor - One Time Accelerated Eddy Current Inspection of Front Rotating Air Seal Bolt Holes | 11/12/1999 | |
| SB 72-476 | en | CFM56-2B: Engine - Low Pressure Turbine Assembly - Reidentification of LPT Conical Supports and LPT Stub Shafts | 12/07/1993 | |
| SB 72-561 | 1 | en | CFM56-2B: Engine - High Pressure Turbine Rotor - One Time Accelerated Eddy Current Inspection of Disk Rim Bolt Holes | 01/31/1997 |
| SB 72-611 | en | CFM56-2B: Engine - High Pressure Turbine Rotor - Current Inspection of Front Rotating One Time Accelerated Eddy Air Seal Bolt Holes | 11/12/1999 | |
| SB 72-620 | 4 | en | CFM56-2: Engine - Inlet Gearbox - No. 3 Bearing Improvement Program | 11/17/1995 |
| SB 72-728 | 2 | en | CFM56-2: Engine - Low Pressure Turbine Assembly - Reidentification of LPT Conical Support and LPT Stub Shafts | 12/21/1994 |
| SB 72-823 | en | CFM56-2: Engine - Fan Major Module - Introduction of a New No. 3 Bearing Rear Stationary Air/Oil Seal Retention Bushing | 08/12/1997 | |
| SB 72-825 | en | CFM56-2: Engine - Compressor Rotor - Removal from Service - HPC Stage 1 and 2 Spools that Contacted No. 3 Bearing Rear Stationary Air/Oil Seal | 01/23/1998 | |
| SB 72-869 | en | CFM56-2: Engine - High Pressure Turbine Rotor - Current Inspection of Front Rotating One Time Accelerated Eddy Air Seal Bolt Holes | 11/12/1999 | |
| SB 73-021 | en | CFM56-2: Fuel and Control - Flow Divider and Injector Valve - Introduction of Fuel Injector V/I/N 6760263M28/GE P/N 9984M90G28 | 08/12/1983 | |
| SB 73-024 | 1 | en | CFM56-2: Fuel and Control - Introduction of P/N 9321M92G30 Fuel Nozzles | 08/08/1984 |
| SB 73-034 | en | CFM56-2: Fuel and Control System - Introduction of P/N 9321M92G33 Fuel Nozzles | 08/17/1984 | |
| SB 73-055 | 1 | en | CFM56-2A: Engine - Fuel and Control - Main fuel Pump - Inspection of Fuel Filter Cover Attachment Parts | 04/29/1999 |
| SB 73-074 | 1 | en | CFM56-2B: Engine Fuel and Control - Main Fuel Pump - Replacement of Attachment Parts of Fuel Filter Cover | 01/12/1998 |
| SB 73-076 | 1 | en | CFM56-2B: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts | 04/29/1999 |
| SB 73-109 | 1 | en | CFM56-2: Engine Fuel and Control - Main Fuel Pump - Replacement of Attachment Parts of Fuel Filter Cover | 01/07/1998 |
| SB 73-110 | 2 | en | CFM56-2: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts | 04/29/1999 |
| SB 73-A058 | en | CFM56-2A: Engine Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Fuel Cover Attachment | 08/17/1999 | |
| SB 73-A113 | en | CFM56-2: Engine Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Filter Cover Attachment | 08/17/1999 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SB 72-205 | 3 | en | CFM56-3/3B: Engine - Transfer Gearbox - Inspection of Spirolock and Oil Distributor Installed on Transfer Gearbox | 04/16/1986 |
| SB 72-450 | 1 | en | CFM56-3/3B/3C: Engine - Fan Assembly - Introduction of a New Splitter Fairing | 05/30/1989 |
| SB 72-462 | 1 | en | CFM56-3/3B/3C: Engine - General - Reintroduction of 12 VBV Doors Configuration | 05/30/1989 |
| SB 72-494 | 2 | en | CFM56-3/3B/3C: Engine - Fan and Booster Assembly - Introduction of Fan Blades Dampers | 06/18/1990 |
| SB 72-530 | 3 | en | CFM56-3/3B/3C: Engine - Inlet Gearbox - No. 3 Bearing Improvement Program | 11/17/1995 |
| SB 72-543 | 4 | en | CFM56-3/3B/3C: Engine - Fan and Booster- Introduction of Fan Blades with 37-Degree Midspan Shrouds | 07/29/1992 |
| SB 72-695 | en | CFM56-3/3B/3C: Engine - Low Pressure Turbine Assembly - Reidentification of LPT Conical Supports and LPT Stub Shafts | 11/25/1993 | |
| SB 72-843 | 1 | en | CFM56-3/3B/3C: Engine - High Pressure Turbine Rotor - One Time Accelerated Eddy Current Inspection of Disk Rim Bolt Holes | 11/25/1997 |
| SB 72-854 | 1 | en | CFM56-3/3B/3C: Engine - Fan and Booster - One Time Wear and Ultrasonic Local Inspection of Fan Disk Slot Pressure Faces | 08/07/1998 |
| SB 72-854 | 2 | en | CFM56-3/3B/3C: Engine - Fan and Booster - One Time Wear and Ultrasonic Local Inspection of Fan Disk Slot Pressure Faces | 11/29/1999 |
| SB 72-855 | 1 | en | CFM56-3/3B/3C: Engine - Fan Major Module - Introduction of a New No. 3 Bearing Rear Stationary Air/Oil Seal Retention Bushing | 02/09/1998 |
| SB 72-856 | en | CFM56-3/3B/3C: Engine - Compressor Rotor - Removal from Service - HPC Stage 1 and 2 Spools that Contacted No. 3 Bearing Rear Stationary Air/Oil Seal | 01/23/1998 | |
| SB 72-863 | 1 | en | CFM56-3/3B/3C: Engine - Accessory Gearbox - Starter Gearshaft Replacement | 11/18/1997 |
| SB 72-865 | en | CFM56-3/3B/3C: Engine - Transfer Gearbox - Transfer Gearbox Assembly Replacement | 11/18/1997 | |
| SB 72-867 | en | CFM56-3/3B/3C: Engine - Transfer Gearbox - Replacement of Bevel Gears in Shop | 11/28/1997 | |
| SB 72-873 | 1 | en | CFM56-3/3B/3C: Engine - Accessory Gearbox - Gearshaft Assembly (73X44 Tooth) Equipped Replacement | 02/05/1998 |
| SB 72-877 | 1 | en | CFM56-3/3B/3C: Engine - Accessory Gearbox - Starter Gearshaft Replacement | 06/15/1998 |
| SB 72-922 | en | CFM56-3/3B/3C: Engine - High Pressure Turbine Rotor - Current Inspection of Front Rotating One Time Accelerated Eddy Air Seal Bolt Holes | 11/12/1999 | |
| SB 72-1129 | en | CFM56-3/3B/3C: Engine - General - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to New One | 03/09/2011 | |
| SB 72-1169 | 1 | en | CFM56-3: Engine - General - Recommendation to Perform Variable Stator Vane Actuation Check for VSV Bore Seizure Due to Corrosion | 11/04/2016 |
| SB 72-A861 | 3 | en | CFM56-3/3B/3C: Engine - Transfer Gearbox and Accessory Gearbox - Reduced Interval for Magnetic Chip Detector Inspection | 12/03/1997 |
| SB 73-125 | 1 | en | CFM56-3/3B/3C: Engine Fuel and Control - Main Fuel Pump - Replacement of Attachment Parts of Fuel Filter Cover | 01/07/1998 |
| SB 73-126 | 1 | en | CFM56-3/3B/3C: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts | 04/29/1999 |
| SB 73-A129 | en | CFM56-3/3B/3C: Fuel and Control - Main Fuel Pump - Introduction of New Fuel Pump with New Filter Cover Attachment | 08/17/1999 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SB 72-064 | 2 | en | CFM56-5B: Engine - Compressor Rotor - Flexible Borescope Inspection of HPC Stage 1 Disk Bore Forward Corner for Rubs/Scratches | 06/23/1995 |
| SB 72-0777 | 1 | en | CFM56-5B: Engine - Fan and Booster Assembly - Fan Blade Replacement for Mid Span Shroud Non Conforming Contour | 04/11/2011 |
| SB 72-0794 | 1 | en | CFM56-5C: Engine - HPT Rotor Assembly - Replacement of Rotating HPT Front Air Seals P/N 1795M36P01 and P/N 1795M36P02 | 01/02/2019 |
| SB 72-0796 | 2 | en | CFM56-5C: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb | 08/10/2022 |
| SB 72-0850 | en | CFM56-5B: Engine - LPT Frame Assembly - Inspection of Turbine Rear Frame | 12/19/2012 | |
| SB 72-0934 | en | CFM56-5B: Engine - Transfer Gearbox Assembly - Replacement of Suspected Batch of Radial Drive Shaft Assembly and Associated Radial Drive Shaft Outer Housing | 08/01/2016 | |
| SB 72-0952 | en | CFM56-5B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb | 04/23/2019 | |
| SB 72-0952 | 1 | en | CFM56-5B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb | 01/15/2020 |
| SB 72-0952 | 2 | en | CFM56-5B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb | 08/10/2022 |
| SB 72-211 | 1 | en | CFM56-5B: Engine - Accessory Gearbox - Gearshaft Cluster Spur Assembly (31X71 Tooth) Replacement | 01/29/1998 |
| SB 72-229 | 2 | en | CFM56-5C: Engine - Compressor Rotor - Flexible Borescope Inspection of HPC Stage I Disk Bore Forward Corner for Rubs/Scratches | 06/23/1995 |
| SB 72-350 | 1 | en | CFM56-5C: Engine - Accessory Gearbox - Gearshaft Cluster Spur Assembly (31X71 Tooth) Replacement | 01/30/1998 |
| SB 72-440 | 2 | en | CFM56-5: Engine - Compressor Rotor - Flexible Borescope Inspection of HPC Stage 1 Disk Bore Forward Corner for Rubs/Scratches | 06/23/1995 |
| SB 72-523 | 1 | en | CFM56-5: Engine - Accessory Gearbox - Gearshaft Cluster Spur Assembly (31X71 Tooth) Replacement | 01/30/1998 |
| SB 72-541 | en | CFM56-5: Engine - High Pressure Turbine Rotor - HPT Front Rotating Air Seal Reduced Life Limits | 07/27/1998 | |
| SB 72-1074 | 1 | en | CFM56-5B: Engine - HPT Rotor Assembly - Replacement of Rotating Air HPT Front Seals P/N 1795M36P01 and P/N 1795M36P02 | 12/05/2018 |
| SB 72-A118 | 1 | en | CFM56-5: Engine - Inlet Gearbox and No. 3 Bearing - Forward Sump Magnetic Plug Chip Detector Inspection of Engines with No. 3 Bearing P/N 9542M60P01 | 08/01/1997 |
| SB 73-0122 | 8 | en | CFM56-5B: Engine Fuel and Control - Use of CIS Fuels | 03/08/2012 |
| SB 73-0182 | 6 | en | CFM56-5: Engine Fuel and Control - Use of CIS Fuels | 03/08/2012 |
| SB 73-073 | 2 | en | CFM56-5C: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts | 04/29/1999 |
| SB 73-136 | 2 | en | CFM56-5: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts | 04/29/1999 |
| SB 73-A062 | en | CFM56-5B: Engine Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Filter Cover Attachment | 06/18/1999 | |
| SB 73-A078 | en | CFM56-5C: Engine Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Filter Cover Attachment | 06/21/1999 | |
| SB 73-A143 | en | CFM56-5: Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Filter Cover Attachment | 06/18/1999 | |
| SB 80-003 | 5 | en | CFM56-5: Starting - Air Turbine Engine Starter - Rework of Air Turbine Engine Starter P/N 3505582-1 to P/N 3505582-2 | 10/25/1994 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SB 72-0564 | 3 | en | CFM56-7B: Engine - General - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and Rework of Old AGB to New One | 05/25/2011 |
| SB 72-0964 | 1 | en | CFM56-7B: Engine - Accessory Gearbox - AGB/TGB Magnetic Chip Detector (MCD) Inspection | 12/15/2014 |
| SB 72-0965 | en | CFM56-7B: Engine - Accessory Gearbox - 73 Tooth Gearshaft and 41 Tooth Gearshaft Management | 12/16/2014 | |
| SB 72-130 | en | CFM56-7B: Engine - Accessory Gearbox - Starter Gearshaft Replacement | 06/29/1998 | |
| SB 72-132 | en | CFM56-7B: Engine - Accessory Gearbox - Reduced Interval for Magnetic Chip Detector Inspection | 07/02/1998 | |
| SB 72-1033 | en | CFM56-7B: Engine - Fan and Booster Assembly - Fan Blade Dovetail Repetitive Ultrasonic Inspection | 04/20/2018 | |
| SB 72-1033 | 1 | en | CFM56-7B: Engine - Fan and Booster Assembly - Fan Blade Dovetail Repetitive Ultrasonic Inspection | 05/09/2018 |
| SB 72-1033 | 2 | en | CFM56-7B: Engine - Fan and Booster Assembly - Fan Blade Dovetail Repetitive Ultrasonic Inspection | 07/27/2018 |
| SB 72-1033 | 3 | en | CFM56-7B: Engine - Fan and Booster Assembly - Fan Blade Dovetail Repetitive Ultrasonic Inspection | 11/06/2018 |
| SB 72-1042 | 1 | en | CFM56-7B: Engine - HPT Rotor Assembly - Replacement of Rotating Air HPT Front Seal P/N 1795M36P02 | 01/02/2019 |
| SB 72-1054 | en | CFM56-7B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb | 04/23/2019 | |
| SB 72-1054 | 1 | en | CFM56-7B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb | 01/15/2020 |
| SB 72-1054 | 2 | en | CFM56-7B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb | 08/10/2022 |
| SB 73-0135 | en | CFM56-7B: Engine Fuel and Control - ECU - New Software Version 7.B.R3 | 03/30/2007 | |
| SB 73-016 | 2 | en | CFM56-7B: Engine Fuel and Control - Hydromechanical Unit - Scheduled Inspection | 08/10/1998 |
| SB 73-A024 | en | CFM56-7B: Engine Fuel and Control - Electronic Engine Control - Introduction of Software Version 7.B.I1 (7B38) | 09/02/1998 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SB LEAP-1A-72-00-0405-01A-930A-D | en | Engine - High Pressure Turbine Rotor Assembly - Stage 2 Disk Immersion Ultrasonic Inspection | 03/05/2020 | |
| SB LEAP-1A-72-00-0421-01A-930A-D | en | Engine - High Pressure Turbine Stator - LEAP-1A HPT Case Removal | 10/22/2020 | |
| SB LEAP-1A-72-00-0460-01A-930A-D | en | High Pressure Turbine Rotor Assembly - Inspection of HPT Module to Determine HPT Rotor Interstage Seal & HPT Rotor Stage 2 Disk Replacement | 04/01/2022 | |
| SB LEAP-1A-72-00-0461-01A-930A-D | Iss 3 | en | Engine - HPT Rotor Assembly - Improved HPT Rotor Stage 1 Blade BSI Intervals for Middle East & North Africa Region | 07/13/2022 |
| SB LEAP-1A-72-00-0470-01A-930A-D | Iss 3 | en | Engine - High Pressure Turbine Rotor Assembly - Forward Outer Seal Removal from Service | 03/03/2023 |
| SB LEAP-1A-72-00-0492-01A-930A-D | en | Engine - High Pressure Turbine Rotor Assembly - HPT Rotor Interstage Seal Removal from Service | 04/06/2023 | |
| SB LEAP-1A-72-00-0493-01A-930A-D | Iss 2 | en | Engine - High Pressure Turbine Rotor Assembly - Removal of HPT Stage 1 Disk from Service | 11/17/2022 |
| SB LEAP-1A-72-00-0496-01A-930A-D | en | Engine - Core Module Assembly - Removal of HPT Stage 1 Disks, Forward Outer Seals, & HPC Stage 6-10 Spools from Service | 03/07/2023 | |
| SB LEAP-1A-72-00-0504-01A-930A-D | Iss 2 | en | Engine - General - Non-Synchronous Vibration Monitoring Recommendations | 10/17/2023 |
| SB LEAP-1A-72-00-0519-01A-930A-D | en | Engine - Low Pressure Turbine Rotor & Stator Module - Removal from Service of LPT Stage 5 Disks | 09/18/2024 | |
| SB LEAP-1A-72-00-0525-01A-930A-D | Iss 2 | en | Engine - High Pressure Turbine Rotor Assembly - HPT Rotor Interstage Seal Removal from Service | 06/28/2024 |
| SB LEAP-1A-73-00-0027-01A-930A-D | en | Engine Fuel and Control - Electronic Engine Control - Release of New Electronic Engine Control (EEC) Software P/Ns 2590M00P08 (Version L1A0550) and 2784M64P02 (Version PL1A0550) | 07/30/2018 | |
| SB LEAP-1B-72-00-0193-01A-930A-D | Iss 3 | en | Engine - High Pressure Turbine Stator Case - Removal of HPT Stator Cases from Service | 11/05/2018 |
| SB LEAP-1B-72-00-0222-01A-930A-D | Iss 7 | en | Engine - Transfer Gearbox Module - Repetitive Inspection of TGB Scavenge Screens | 05/17/2019 |
| SB LEAP-1B-72-00-0256-01A-930A-D | Iss 3 | en | Engine - Transfer Gearbox Module - Optional Radial Drive Shaft Bearing Cage Borescope Inspection - Cancellation Notice | 05/17/2019 |
| SB LEAP-1B-72-00-0258-01A-930A-C | Iss 2 | en | Engine - Fan Frame Assembly - Introduction of a New Inner RDS with Redesigned Ball Bearing & Oil Distributor | 09/15/2020 |
| SB LEAP-1B-72-00-0365-01A-930A-D | Iss 3 | en | Engine - Transfer Gearbox Module - TGB Repetitive Screen Inspections for Sub Population of Radial Drive Shaft Bearings | 04/26/2022 |
| SB LEAP-1B-72-00-0369-01A-930A-D | en | Engine - General - Recommendations for Engines with Potential No. 3 Bearing Spring Finger Housing Wear | 08/22/2022 | |
| SB LEAP-1B-72-00-0392-01A-930A-D | Iss 2 | en | Engine - Core Module Assembly - Removal of HPT Stage 1 Disks & HPC Stage 6-10 Spool from Service | 09/05/2023 |
| SB LEAP-1B-72-00-0394-01A-930A-D | Iss 2 | en | Engine - Forward Compressor Stator Assembly - Stage 2 Compressor Stator Seal & Rotor Seal Teeth Inspection | 01/23/2024 |
| SB LEAP-1B-72-00-0419-01A-930A-D | en | Engine - Low Pressure Turbine Rotor & Stator Module - Removal from Service of LPT Stage 4 Disk-Stubshafts & LPT Stage 5 Disks | 09/18/2024 | |
| SB LEAP-1B-73-00-0016-01A-930A-D | Iss 2 | en | Engine Fuel and Control - Electronic Engine Control - Release of New EECÂ Software Version 6.5 | 10/30/2018 |
| SB LEAP-1B-73-00-0038-01A-930A-D | Iss 2 | en | Engine Fuel and Control - Pressure Sub System - Pressure Transducer Faults in Early Return to Service | 04/25/2021 |
| SB LEAP-1C-72-00-0100-01A-930A-D | en | Engine - Low Pressure Turbine Rotor & Stator Module - Exclusion of LPT Stage 5 Disks from Being Installed on LEAP-1C Engines | 09/18/2024 | |
| SB LEAP-1C-72-00-0124-01A-930A-D | en | Engine - High Pressure Turbine Rotor Assembly - Exclusion of HPT Rotor Interstage Seals from Being Installed in LEAP-1C Engines | 09/05/2024 |