Airworthiness Directives; AlliedSignal Inc. TPE331 Series Turboprop Engines

摘要

This amendment adopts a new airworthiness directive (AD), applicable to AlliedSignal Inc. (formerly Garrett Engine Division and Garrett Turbine Engine Company) TPE331 series turboprop engines equipped with Woodward fuel controls, that requires revising the applicable Emergency Procedures or Abnormal Procedures Section of the applicable Federal Aviation Administration (FAA)-approved Airplane Flight Manual (AFM) or Pilot's Operating Handbook (POH) to include a paragraph relating to a non-responsive power lever. In addition, this AD requires replacing or reworking orifice fittings and restrictors, which would constitute terminating action to the requirement to revise the applicable AFM. This amendment is prompted by reports of occasional icing of the inlet Pt2 sensor, which can produce an erroneous (high) pressure signal to the fuel control, causing little or no response to power lever movement. The actions specified by this AD are intended to prevent a non-responsive power lever and lack of control of engine power.