Engine — Critical Life-Limited Parts — Replacement
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of MAKILA 1 engines must, within 10 flight hours or 30 days after 2024-01-02, recalculate the service life of affected parts following SAFRAN's service bulletin instructions. Depending on the recalculated life, affected parts must be replaced within specified flight cycle or hour limits as detailed in the directive. Installation of affected parts is only permitted if they are serviceable and will be replaced before exceeding their recalculated life limits.
Summary
EASA Airworthiness Directive 2023-0218 is an airworthiness directive addressing SAFRAN Helicopter Engines MAKILA 1A, 1A1, and 1A2 engines installed on Airbus Helicopters AS 332 series models. It mandates the re-calculation and replacement of certain critical life-limited engine parts to ensure continued airworthiness. The directive applies to specific axial wheels, centrifugal impellers, injection wheels, and high pressure turbine discs identified by serial numbers in the SAFRAN Mandatory Service Bulletin A298 72 0837 Version A.
What changed
This new airworthiness directive introduces requirements to determine the re-calculated service life of affected engine parts and mandates their replacement based on the recalculated limits. It also establishes conditions for the installation of affected parts, allowing installation only if the part is serviceable and replaced before exceeding the authorized in-service life limit. The directive provides specific compliance times based on the recalculated service life status of the parts.
Why it matters
This directive is critical for aviation professionals as it addresses a potential underestimation of service life for key engine components, which could lead to part failure and serious safety risks including high energy debris release and helicopter control loss. Operators and maintenance organizations must comply to prevent unsafe operation and ensure regulatory conformity. It impacts maintenance planning, parts inventory management, and compliance monitoring for affected helicopter engines.
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