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Wed, Sep 24, 2008

AD: Turbomeca

AD NUMBER: 2008-19-11
MANUFACTURER: Turbomeca
SUBJECT: Airworthiness Directive 2008-19-11
SUMMARY:
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) provided by the European Aviation Safety Agency (EASA) to identify and correct an unsafe condition on Turbomeca S.A. Arrius 2B1,2B1A, 2B2, and 2K1 turboshaft engines. The MCAI describes the unsafe condition as: A short circuit of some tantalum capacitors inside certain electronic control (EEC) units may lead to an inflight shutdown on one of the two engines resulting from: -Direct activation of the overspeed electronic protection; -Non-direct activation of the electronic overspeed protection by lowering the threshold, -Spurious activation of the starting sequence; or -Loss of power control with no freeze of the fuel-metering valve. We are issuing this AD to prevent in-flight engine shutdowns and possible forced autorotation landing or accident.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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