Airworthiness Directives; Turbomeca Artouste III Series Turboshaft Engines

This amendment adopts a new airworthiness directive (AD), applicable to Turbomeca Artouste III series turboshaft engines, that requires smoke emissions checks after every ground engine shutdown. If smoke is detected, this AD would require inspecting for fuel flow. If fuel flow is not detected, the engine may have injection wheel cracks, which would require removing the engine from service for repair. If fuel flow is detected, the engine may have a malfunctioning electric fuel cock, which would require removing the electric fuel cock from service and replacing it with a serviceable part. This action is prompted by reports of cracked injection wheels. The actions specified by this AD are intended to prevent injection wheel cracks, which could result in an in-flight engine shutdown.