AD 2012-12-20
Effective 07/26/2012 · Published 06/21/2012
Airworthiness Directives; Turbomeca S.A. Turboshaft Engines
Summary
We are adopting a new airworthiness directive (AD) for Turbomeca S.A. Arriel 2C1, 2C2, and 2S2 turboshaft engines. This AD requires replacement of affected digital engine control units (DECUs). This AD was prompted by a report of a helicopter experiencing a DECU malfunction during flight. We are issuing this AD to prevent loss of automatic control on one or both engines installed on the same helicopter, which could…