POWER PLANT – GENERAL
The AW139 is powered by two Pratt & Whitney Canada PT6C-67C turbine
engines.
Each engine is a free turbine turbo-shaft propulsion engine that includes a
four stage axial compressor and a one stage centrifugal compressor. The
compressors are driven by a single-stage compressor turbine.
The two stage power turbine drives the output shaft which supplies power
directly to the input gears of the MGB.
An Electronic Engine Control (EEC) unit with an hydro-mechanical Fuel
Management Module (FMM), ensures automatic control of the engine and
fast response changes in power demand.
The Engine Control Lever (ECL) provides manual back-up in case the
automatic engine control system fails.
The engine indicating system includes sensors and probes installed on the
engine that check the status of the engines.
Each engine supplies 1872 SHP in OEI condition.