CANCELLED: Engine — Gas Generator First Stage High Pressure Turbine Blades — Replacement
- Published
- Effective
- Replaces
- 2024-0207R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
No further action or compliance is required from operators or maintenance providers regarding the replacement of the affected turbine blades. Stakeholders should update their records to reflect the cancellation and continue following standard SAFRAN maintenance instructions for ARRIEL 1 engines.
Summary
EASA Airworthiness Directive Cancellation Notice 2024-0207R1-CN cancels the previous directive concerning the replacement of first stage high pressure turbine blades on SAFRAN Helicopter Engines ARRIEL 1 series engines. These engines are installed on various helicopter models including Airbus Helicopters AS 350, AS 365, MBB-BK117, Leonardo A109K2, and Sikorsky S-76A. The cancellation reflects updated findings regarding the safety and service life of the affected turbine blades.
What changed
This cancellation notice revokes EASA AD 2024-0207R1 and its correction, which mandated replacement of certain first stage high pressure turbine blades due to concerns about porosity affecting mechanical strength. Further investigation showed that the porosity issue does not impact the blades' service life or safety, removing the need for the previously required replacement and life limits.
Why it matters
For aviation professionals, this cancellation reduces maintenance burdens and operational restrictions related to the affected turbine blades on ARRIEL 1 engines. Operators and maintenance organizations can now rely on the original service life limits without mandatory early replacement, improving cost efficiency and scheduling flexibility while maintaining safety compliance.
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- EASA AD 2017-0064R2Engine Fuel & Control — Drain Valve Assembly — Inspection / ReplacementApr 19, 2018
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