The Aviation DataBase: Service Information: CFM International
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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

Engine Shop Manuals: CFM56-7 Series
NameRevisionLangSubjectDate
57 en CFM56-7B1/15/2018
Engine Shop Manuals: LEAP Series
NameRevisionLangSubjectDate
Iss 2 en High Pressure Turbine Rotor Parts - Mandatory Inspections1/9/2020
en Mandatory Maintenance Practices - Mandatory Inspections1/9/2020
Life Limits Manuals: LEAP Series
NameRevisionLangSubjectDate
Iss 010-00 en High Pressure Compressor Rotor9/15/2021
Iss 007-00 en High Pressure Turbine Rotor9/15/2021
Iss 010-00 en Low Pressure Turbine Rotor2/15/2022
Iss 010-00 en High Pressure Compressor Rotor3/17/2022
Iss 007-00 en High Pressure Turbine Rotor3/17/2022
Iss 008-00 en Low Pressure Turbine Rotor2/16/2022
Messages: CFM56-7 Series
NameRevisionLangSubjectDate
en CFM56-7B: Auto Acceleration Events8/28/1998
Service Bulletins: CFM56-2 Series
NameRevisionLangSubjectDate
en CFM56-2A: Engine - Low Pressure Turbine Assembly - Reidentification of LPT Conical Supports and LPT Stub Shafts11/25/1993
2 en CFM56-2A: Engine - High Pressure Turbine Rotor - One Time Accelerated Eddy Current Inspection of the Disk Rim Bolt Holes11/14/1997
en CFM56-2A: Engine - High Pressure Turbine Rotor - One Time Accelerated Eddy Current Inspection of Front Rotating Air Seal Bolt Holes11/12/1999
en CFM56-2B: Engine - Low Pressure Turbine Assembly - Reidentification of LPT Conical Supports and LPT Stub Shafts12/7/1993
1 en CFM56-2B: Engine - High Pressure Turbine Rotor - One Time Accelerated Eddy Current Inspection of Disk Rim Bolt Holes1/31/1997
en CFM56-2B: Engine - High Pressure Turbine Rotor - Current Inspection of Front Rotating One Time Accelerated Eddy Air Seal Bolt Holes11/12/1999
4 en CFM56-2: Engine - Inlet Gearbox - No. 3 Bearing Improvement Program11/17/1995
2 en CFM56-2: Engine - Low Pressure Turbine Assembly - Reidentification of LPT Conical Support and LPT Stub Shafts12/21/1994
en CFM56-2: Engine - Fan Major Module - Introduction of a New No. 3 Bearing Rear Stationary Air/Oil Seal Retention Bushing8/12/1997
en CFM56-2: Engine - Compressor Rotor - Removal from Service - HPC Stage 1 and 2 Spools that Contacted No. 3 Bearing Rear Stationary Air/Oil Seal1/23/1998
en CFM56-2: Engine - High Pressure Turbine Rotor - Current Inspection of Front Rotating One Time Accelerated Eddy Air Seal Bolt Holes11/12/1999
en CFM56-2: Fuel and Control - Flow Divider and Injector Valve - Introduction of Fuel Injector V/I/N 6760263M28/GE P/N 9984M90G288/12/1983
1 en CFM56-2: Fuel and Control - Introduction of P/N 9321M92G30 Fuel Nozzles8/8/1984
en CFM56-2: Fuel and Control System - Introduction of P/N 9321M92G33 Fuel Nozzles8/17/1984
1 en CFM56-2A: Engine - Fuel and Control - Main fuel Pump - Inspection of Fuel Filter Cover Attachment Parts4/29/1999
1 en CFM56-2B: Engine Fuel and Control - Main Fuel Pump - Replacement of Attachment Parts of Fuel Filter Cover1/12/1998
1 en CFM56-2B: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts4/29/1999
1 en CFM56-2: Engine Fuel and Control - Main Fuel Pump - Replacement of Attachment Parts of Fuel Filter Cover1/7/1998
2 en CFM56-2: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts4/29/1999
en Alert CFM56-2A: Engine Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Fuel Cover Attachment8/17/1999
en Alert CFM56-2: Engine Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Filter Cover Attachment8/17/1999
Service Bulletins: CFM56-3 Series
NameRevisionLangSubjectDate
3 en CFM56-3/3B: Engine - Transfer Gearbox - Inspection of Spirolock and Oil Distributor Installed on Transfer Gearbox4/16/1986
1 en CFM56-3/3B/3C: Engine - Fan Assembly - Introduction of a New Splitter Fairing5/30/1989
1 en CFM56-3/3B/3C: Engine - General - Reintroduction of 12 VBV Doors Configuration5/30/1989
2 en CFM56-3/3B/3C: Engine - Fan and Booster Assembly - Introduction of Fan Blades Dampers6/18/1990
3 en CFM56-3/3B/3C: Engine - Inlet Gearbox - No. 3 Bearing Improvement Program11/17/1995
4 en CFM56-3/3B/3C: Engine - Fan and Booster- Introduction of Fan Blades with 37-Degree Midspan Shrouds7/29/1992
en CFM56-3/3B/3C: Engine - Low Pressure Turbine Assembly - Reidentification of LPT Conical Supports and LPT Stub Shafts11/25/1993
1 en CFM56-3/3B/3C: Engine - High Pressure Turbine Rotor - One Time Accelerated Eddy Current Inspection of Disk Rim Bolt Holes11/25/1997
1 en CFM56-3/3B/3C: Engine - Fan and Booster - One Time Wear and Ultrasonic Local Inspection of Fan Disk Slot Pressure Faces8/7/1998
2 en CFM56-3/3B/3C: Engine - Fan and Booster - One Time Wear and Ultrasonic Local Inspection of Fan Disk Slot Pressure Faces11/29/1999
1 en CFM56-3/3B/3C: Engine - Fan Major Module - Introduction of a New No. 3 Bearing Rear Stationary Air/Oil Seal Retention Bushing2/9/1998
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 Seal1/23/1998
1 en CFM56-3/3B/3C: Engine - Accessory Gearbox - Starter Gearshaft Replacement11/18/1997
en CFM56-3/3B/3C: Engine - Transfer Gearbox - Transfer Gearbox Assembly Replacement11/18/1997
en CFM56-3/3B/3C: Engine - Transfer Gearbox - Replacement of Bevel Gears in Shop11/28/1997
1 en CFM56-3/3B/3C: Engine - Accessory Gearbox - Gearshaft Assembly (73X44 Tooth) Equipped Replacement2/5/1998
1 en CFM56-3/3B/3C: Engine - Accessory Gearbox - Starter Gearshaft Replacement6/15/1998
en CFM56-3/3B/3C: Engine - High Pressure Turbine Rotor - Current Inspection of Front Rotating One Time Accelerated Eddy Air Seal Bolt Holes11/12/1999
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 One3/9/2011
1 en CFM56-3: Engine - General - Recommendation to Perform Variable Stator Vane Actuation Check for VSV Bore Seizure Due to Corrosion11/4/2016
3 en Alert CFM56-3/3B/3C: Engine - Transfer Gearbox and Accessory Gearbox - Reduced Interval for Magnetic Chip Detector Inspection12/3/1997
1 en CFM56-3/3B/3C: Engine Fuel and Control - Main Fuel Pump - Replacement of Attachment Parts of Fuel Filter Cover1/7/1998
1 en CFM56-3/3B/3C: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts4/29/1999
en Alert CFM56-3/3B/3C: Fuel and Control - Main Fuel Pump - Introduction of New Fuel Pump with New Filter Cover Attachment8/17/1999
Service Bulletins: CFM56-5 Series
NameRevisionLangSubjectDate
2 en CFM56-5B: Engine - Compressor Rotor - Flexible Borescope Inspection of HPC Stage 1 Disk Bore Forward Corner for Rubs/Scratches6/23/1995
1 en CFM56-5B: Engine - Fan and Booster Assembly - Fan Blade Replacement for Mid Span Shroud Non Conforming Contour4/11/2011
1 en CFM56-5C: Engine - HPT Rotor Assembly - Replacement of Rotating HPT Front Air Seals P/N 1795M36P01 and P/N 1795M36P021/2/2019
2 en CFM56-5C: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb8/10/2022
en CFM56-5B: Engine - LPT Frame Assembly - Inspection of Turbine Rear Frame12/19/2012
en CFM56-5B: Engine - Transfer Gearbox Assembly - Replacement of Suspected Batch of Radial Drive Shaft Assembly and Associated Radial Drive Shaft Outer Housing8/1/2016
en CFM56-5B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb4/23/2019
1 en CFM56-5B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb1/15/2020
2 en CFM56-5B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb8/10/2022
1 en CFM56-5B: Engine - Accessory Gearbox - Gearshaft Cluster Spur Assembly (31X71 Tooth) Replacement1/29/1998
2 en CFM56-5C: Engine - Compressor Rotor - Flexible Borescope Inspection of HPC Stage I Disk Bore Forward Corner for Rubs/Scratches6/23/1995
1 en CFM56-5C: Engine - Accessory Gearbox - Gearshaft Cluster Spur Assembly (31X71 Tooth) Replacement1/30/1998
2 en CFM56-5: Engine - Compressor Rotor - Flexible Borescope Inspection of HPC Stage 1 Disk Bore Forward Corner for Rubs/Scratches6/23/1995
1 en CFM56-5: Engine - Accessory Gearbox - Gearshaft Cluster Spur Assembly (31X71 Tooth) Replacement1/30/1998
en CFM56-5: Engine - High Pressure Turbine Rotor - HPT Front Rotating Air Seal Reduced Life Limits7/27/1998
1 en CFM56-5B: Engine - HPT Rotor Assembly - Replacement of Rotating Air HPT Front Seals P/N 1795M36P01 and P/N 1795M36P0212/5/2018
1 en Alert CFM56-5: Engine - Inlet Gearbox and No. 3 Bearing - Forward Sump Magnetic Plug Chip Detector Inspection of Engines with No. 3 Bearing P/N 9542M60P018/1/1997
8 en CFM56-5B: Engine Fuel and Control - Use of CIS Fuels3/8/2012
6 en CFM56-5: Engine Fuel and Control - Use of CIS Fuels3/8/2012
2 en CFM56-5C: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts4/29/1999
2 en CFM56-5: Engine - Fuel and Control - Main Fuel Pump - Inspection of Fuel Filter Cover Attachment Parts4/29/1999
en Alert CFM56-5B: Engine Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Filter Cover Attachment6/18/1999
en Alert CFM56-5C: Engine Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Filter Cover Attachment6/21/1999
en Alert CFM56-5: Fuel and Control - Main Fuel Pump - Introduction of a New Fuel Pump with New Filter Cover Attachment6/18/1999
5 en CFM56-5: Starting - Air Turbine Engine Starter - Rework of Air Turbine Engine Starter P/N 3505582-1 to P/N 3505582-210/25/1994
Service Bulletins: CFM56-7 Series
NameRevisionLangSubjectDate
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 One5/25/2011
1 en CFM56-7B: Engine - Accessory Gearbox - AGB/TGB Magnetic Chip Detector (MCD) Inspection12/15/2014
en CFM56-7B: Engine - Accessory Gearbox - 73 Tooth Gearshaft and 41 Tooth Gearshaft Management12/16/2014
en CFM56-7B: Engine - Accessory Gearbox - Starter Gearshaft Replacement6/29/1998
en CFM56-7B: Engine - Accessory Gearbox - Reduced Interval for Magnetic Chip Detector Inspection7/2/1998
en CFM56-7B: Engine - Fan and Booster Assembly - Fan Blade Dovetail Repetitive Ultrasonic Inspection4/20/2018
1 en CFM56-7B: Engine - Fan and Booster Assembly - Fan Blade Dovetail Repetitive Ultrasonic Inspection5/9/2018
2 en CFM56-7B: Engine - Fan and Booster Assembly - Fan Blade Dovetail Repetitive Ultrasonic Inspection7/27/2018
3 en CFM56-7B: Engine - Fan and Booster Assembly - Fan Blade Dovetail Repetitive Ultrasonic Inspection11/6/2018
1 en CFM56-7B: Engine - HPT Rotor Assembly - Replacement of Rotating Air HPT Front Seal P/N 1795M36P021/2/2019
en CFM56-7B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb4/23/2019
1 en CFM56-7B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb1/15/2020
2 en CFM56-7B: Engine - Combustion Assembly - Repair of HPT Inner Stationary Seal Honeycomb8/10/2022
en CFM56-7B: Engine Fuel and Control - ECU - New Software Version 7.B.R33/30/2007
2 en CFM56-7B: Engine Fuel and Control - Hydromechanical Unit - Scheduled Inspection8/10/1998
en Alert CFM56-7B: Engine Fuel and Control - Electronic Engine Control - Introduction of Software Version 7.B.I1 (7B38)9/2/1998
Service Bulletins: LEAP Series
NameRevisionLangSubjectDate
en Engine - High Pressure Turbine Rotor Assembly - Stage 2 Disk Immersion Ultrasonic Inspection3/5/2020
en Engine - High Pressure Turbine Stator - LEAP-1A HPT Case Removal10/22/2020
en High Pressure Turbine Rotor Assembly - Inspection of HPT Module to Determine HPT Rotor Interstage Seal & HPT Rotor Stage 2 Disk Replacement4/1/2022
Iss 3 en Engine - HPT Rotor Assembly - Improved HPT Rotor Stage 1 Blade BSI Intervals for Middle East & North Africa Region7/13/2022
Iss 3 en Engine - High Pressure Turbine Rotor Assembly - Forward Outer Seal Removal from Service3/3/2023
en Engine - High Pressure Turbine Rotor Assembly - HPT Rotor Interstage Seal Removal from Service4/6/2023
Iss 2 en Engine - High Pressure Turbine Rotor Assembly - Removal of HPT Stage 1 Disk from Service11/17/2022
en Engine - Core Module Assembly - Removal of HPT Stage 1 Disks, Forward Outer Seals, & HPC Stage 6-10 Spools from Service3/7/2023
Iss 2 en Engine - General - Non-Synchronous Vibration Monitoring Recommendations10/17/2023
Iss 2 en Engine - High Pressure Turbine Rotor Assembly - Removal of HPT Stage 1 Disk from Service4/24/2025
en Engine - Low Pressure Turbine Rotor & Stator Module - Removal from Service of LPT Stage 5 Disks9/18/2024
Iss 2 en Engine - High Pressure Turbine Rotor Assembly - HPT Rotor Interstage Seal Removal from Service6/28/2024
en Engine - General - Recommendations for Engines with Potential No. 3 Bearing Spring Finger Housing Wear7/22/2024
en Engine - General - Non-Synchronous Vibration Monitoring Recommendations for Engines with No. 3 Bearing Spring Finger Housing from "GCJ" Supplier4/30/225
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)7/30/2018
Iss 3 en Engine - High Pressure Turbine Stator Case - Removal of HPT Stator Cases from Service11/5/2018
Iss 7 en Engine - Transfer Gearbox Module - Repetitive Inspection of TGB Scavenge Screens5/17/2019
Iss 3 en Engine - Transfer Gearbox Module - Optional Radial Drive Shaft Bearing Cage Borescope Inspection - Cancellation Notice5/17/2019
Iss 2 en Engine - Fan Frame Assembly - Introduction of a New Inner RDS with Redesigned Ball Bearing & Oil Distributor9/15/2020
Iss 3 en Engine - Transfer Gearbox Module - TGB Repetitive Screen Inspections for Sub Population of Radial Drive Shaft Bearings4/26/2022
en Engine - General - Recommendations for Engines with Potential No. 3 Bearing Spring Finger Housing Wear8/22/2022
Iss 2 en Engine - Core Module Assembly - Removal of HPT Stage 1 Disks & HPC Stage 6-10 Spool from Service9/5/2023
Iss 2 en Engine - Forward Compressor Stator Assembly - Stage 2 Compressor Stator Seal & Rotor Seal Teeth Inspection1/23/2024
en Engine - Low Pressure Turbine Rotor & Stator Module - Removal from Service of LPT Stage 4 Disk-Stubshafts & LPT Stage 5 Disks9/18/2024
Iss 2 en Engine Fuel and Control - Electronic Engine Control - Release of New EEC Software Version 6.510/30/2018
Iss 2 en Engine Fuel and Control - Pressure Sub System - Pressure Transducer Faults in Early Return to Service4/25/2021
en Engine - Low Pressure Turbine Rotor & Stator Module - Exclusion of LPT Stage 5 Disks from Being Installed on LEAP-1C Engines9/18/2024
en Engine - High Pressure Turbine Rotor Assembly - Exclusion of HPT Rotor Interstage Seals from Being Installed in LEAP-1C Engines9/5/2024