Engine – High Pressure Compressor Stages 6-10 Spools and High Pressure Turbine Rotor Stage 1 Disks – Replacement
Superseded. Comply with 2024-0226, which replaces this document.
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must identify if their LEAP-1B engines have affected parts installed and replace them with serviceable parts within the compliance times specified in the directive or at the next piece-part exposure, whichever occurs first. Installation of affected parts is prohibited from the effective date of 2023-06-09. Maintenance teams should follow the instructions in CFM Service Bulletin LEAP-1B-72-00-0392-01A-930A-D for replacement procedures.
Summary
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.
What changed
This directive introduces mandatory replacement of affected high pressure compressor and turbine parts that may contain iron inclusions resulting from manufacturing deficiencies. It prohibits the installation of these affected parts on any engine and requires compliance within specified timeframes or at the next piece-part exposure. The directive is a new regulation addressing a specific unsafe condition identified in these engine components.
Why it matters
This airworthiness directive is critical for aviation professionals as it addresses a potential safety risk from engine part failures that could lead to high-energy debris release and loss of aircraft control. Operators and maintenance organizations must ensure affected parts are replaced promptly to maintain compliance and safety. Failure to comply could result in unsafe engine operation and regulatory penalties.
More for CFM International LEAP-1B
All 14- EASA SIB 2025-06R1Potential Risk Management Issue after Engine Load Reduction Device ActivationOct 1, 2026
- EASA SIB 2025-06Potential Risk Management Issue after Engine Load Reduction Device ActivationJul 18, 2025
- EASA AD 2025-0003Engine — Low Pressure Turbine — Stage 4 and Stage 5 Disks — ReplacementJan 7, 2025
- EASA AD 2024-0227Engine — High-Pressure Stage 2 Compressor Stator Seal and Rotor Seal Teeth — In-Shop InspectionNov 27, 2024
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