RegNotify

EASA Regulations for CFM International LEAP-1B

12 airworthiness directives and regulations affecting CFM International LEAP-1B.

EASA SIB 2025-06

Potential Risk Management Issue after Engine Load Reduction Device Activation

EASA Safety Information Bulletin 2025-06 is an informational document addressing a potential risk management issue related to the activation of the Load Reduction Device (LRD) on CFM International LEAP engines installed on Boeing 737 Max and Airbus A320 NEO family aeroplanes. The bulletin highlights incidents involving smoke contamination in the flight deck and cabin following LRD activation after engine bird strikes on Boeing 737 Max aircraft powered by CFM LEAP-1B engines. It provides details on the hazards, affected systems, and operational considerations for these aircraft types.

Jul 18, 2025
Safety Information BulletinSafety MgmtFlight OpsCFM International LEAP-1ACFM International LEAP-1CCFM International LEAP-1B

EASA AD 2025-0003

Engine — Low Pressure Turbine — Stage 4 and Stage 5 Disks — Replacement

EASA Airworthiness Directive 2025-0003 is an airworthiness directive addressing the replacement of Low Pressure Turbine Stage 4 and Stage 5 disks on CFM International LEAP-1A, LEAP-1B, and LEAP-1C engines. These engines are installed on aircraft including Airbus A319, A320, A321, Boeing 737-8, 737-8200, 737-9, and COMAC C919. The directive identifies specific affected disk part numbers and serial numbers requiring replacement to ensure continued airworthiness.

Jan 7, 2025
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1ACFM International LEAP-1CCFM International LEAP-1B

EASA AD 2024-0227

Engine — High-Pressure Stage 2 Compressor Stator Seal and Rotor Seal Teeth — In-Shop Inspection

EASA Airworthiness Directive 2024-0227 is an airworthiness directive addressing certain CFM International LEAP-1B engine models installed on Boeing 737-8, 737-8200, and 737-9 aircraft. The directive mandates in-shop inspections of the high-pressure stage 2 compressor stator seals and rotor seal teeth to detect manufacturing defects that could lead to damage and reduced aircraft control. This AD applies specifically to engines with certain serial numbers and requires compliance by December 11, 2024.

Nov 27, 2024
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1B

EASA AD 2024-0226

Engine — High-Pressure Compressor Stages 6-10 Spools and High-Pressure Turbine Rotor Stage 1 Disks — Replacement

EASA Airworthiness Directive 2024-0226 is an airworthiness directive addressing the replacement of high-pressure compressor stages 6-10 spools and high-pressure turbine rotor stage 1 disks in CFM International LEAP-1B engines. These engines are commonly installed on Boeing 737-8, 737-8200, and 737-9 aircraft. The directive mandates replacement of affected parts to ensure continued airworthiness and safety.

Nov 26, 2024
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1B

EASA AD 2023-0109

SUPERSEDED BY EASA AD 2024-0226

EASA Airworthiness Directive 2023-0109 is an airworthiness directive addressing CFM International LEAP-1B engines installed on Boeing 737-8, 737-8200, and 737-9 aircraft. It mandates the replacement of certain high pressure compressor stages 6-10 spools and high pressure turbine rotor stage 1 disks identified as affected parts due to manufacturing defects. The directive aims to ensure continued airworthiness and prevent potential engine failures.

May 26, 2023
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1BBoeing 737-8Boeing 737-8200Boeing 737-9

EASA AD 2022-0074

Engine — Transfer Gearbox Module Scavenge Screens — Inspection / Modification

EASA Airworthiness Directive 2022-0074 is an airworthiness directive addressing the inspection and modification of Transfer Gearbox Module scavenge screens on CFM International LEAP-1B series engines. These engines are installed on Boeing 737-8, 737-9, and 737-8200 aircraft. The directive mandates inspections for metallic particles and requires modifications to affected engines to prevent engine in-flight shutdowns caused by radial drive shaft bearing cage failures.

Apr 27, 2022
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1BBoeing 737-8Boeing 737-9Boeing 737-8200

EASA AD 2022-0071

Time Limits / Maintenance Checks — Airworthiness Limitations Section — Amendment

EASA Airworthiness Directive 2022-0071 is an amendment addressing time limits and maintenance checks for CFM International LEAP-1B engines installed on Boeing 737-8, 737-8200, and 737-9 aircraft. It updates the Airworthiness Limitations Section (ALS) in the LEAP-1B Engine Shop Manual, specifying mandatory life limits and maintenance tasks for critical engine parts. This directive ensures continued airworthiness by mandating compliance with revised maintenance requirements.

Apr 26, 2022
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1BBoeing 737-8Boeing 737-8200Boeing 737-9

EASA AD 2021-0118

Engine Fuel and Control — Pressure Sub-System Units — Operational Check

EASA Airworthiness Directive 2021-0118 is an airworthiness directive addressing the operational check of pressure sub-system units in CFM International LEAP-1B engines installed on Boeing 737-8 and 737-9 aircraft. It targets specific pressure sub-system units with part number 2474M65P06 that may be affected by corrosion. The directive mandates inspections and possible replacement of affected parts to ensure engine thrust control reliability.

Apr 28, 2021
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1BBoeing 737-8Boeing 737-9

EASA AD 2020-0055

SUPERSEDED BY EASA AD 2022-0071

EASA Airworthiness Directive 2020-0055 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting CFM International LEAP-1B engines installed on aircraft including Boeing 737-8 and 737-9 models. It mandates updated maintenance tasks, life limits, and software modifications to ensure continued airworthiness and address safety concerns related to high pressure turbine structures, rotor disc anomalies, bearing failures, and engine control software. The directive consolidates and supersedes previous ADs related to these engines.

Mar 11, 2020
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1BBoeing 737-8Boeing 737-9

EASA AD 2019-0137

SUPERSEDED BY EASA AD 2020-0055

EASA Airworthiness Directive 2019-0137 is an airworthiness directive addressing CFM International LEAP-1B engines installed on Boeing 737-8 and 737-9 aircraft. It mandates repetitive inspections of the transfer gearbox module scavenge screens for metallic particles due to potential failure of the radial drive shaft bearing cage. The directive aims to prevent in-flight engine shutdowns caused by this failure.

Jun 12, 2019
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1BBoeing 737-8Boeing 737-9

EASA AD 2018-0251

SUPERSEDED BY EASA AD 2020-0055

EASA Airworthiness Directive 2018-0251 is an airworthiness directive addressing CFM International LEAP-1B engines installed on Boeing 737-8 and 737-9 aircraft. It mandates updating the electronic engine control (EEC) software to prevent potential thrust loss caused by water accumulation in the FADEC pressure subsystem. This directive applies to all serial numbers of LEAP-1B21 through LEAP-1B28BBJ2 engine models.

Nov 20, 2018
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1BBoeing 737-8Boeing 737-9

EASA AD 2018-0239

Engine — High Pressure Turbine Case — Replacement

EASA Airworthiness Directive 2018-0239 is an official safety directive addressing the replacement of high pressure turbine (HPT) cases in CFM International LEAP-1B engines, which are installed on Boeing 737-8 and 737-9 aircraft. The directive targets specific HPT cases and combustor diffuser nozzle (CDN) cases identified by part and serial numbers due to concerns over unapproved weld repairs and potential life limit reductions. It mandates inspections and replacement of affected parts to prevent possible engine failure and uncontained debris release.

Nov 7, 2018
Airworthiness DirectiveMaintenanceSafety MgmtCFM International LEAP-1BBoeing 737-8Boeing 737-9