Pilot's Operating Handbook
Section 7
Description
Edition 0 - March 05, 2019
Rev. 0
Page 7.6.16
Exhaust system
Exhaust gases are evacuated through exhaust stubs located on sides of engine
cowlings.
Engine accessories
All engine driven accessories, except power turbine tacho-generator (Np), propeller
governor and overspeed governor, are installed on accessory gearbox located
rearwards of engine.
Oil pump
Oil pump is a self-controlled gear pump located at the bottom of oil casing.
Fuel high pressure pump (HP)
Fuel high pressure pump is installed on accessory gearbox. It supplies fuel nozzles,
flow being controlled by fuel regulator (FCU). Fuel provided by engine driven main
pump (mechanical) enters high pressure pump through a filter, then it is discharged
under pressure into fuel regulator (FCU) through a second filter. In case of
contamination of this second filter, a by-pass valve allows fuel to go directly from high
pressure pump to the regulator.
Compressor turbine tacho-generator (Ng)
Compressor turbine tacho-generator (Ng) is attached on accessory gearbox. It
supplies a voltage which is transmitted to the GARMIN system for display on the MFD,
under normal display conditions.
Power turbine tacho-generator (Np)
Power turbine tacho-generator is attached on the right side of the reduction gearbox. It
supplies a voltage which is transmitted to the GARMIN system for display on the MFD,
under normal display conditions.
Torque transmitter
Torque transmitter is attached on the torque limiter, it measures torque produced by
the power turbine by comparing oil pressures (reduction gear and power turbine) and
converts pressure difference into a voltage. This voltage is transmitted to the GARMIN
system for display on the MFD, under normal display conditions.
Propeller overspeed limiter
Propeller overspeed limiter is installed on left side of the reduction gear box. It
prevents a propeller overspeed in case of main propeller governor failure.
Propeller overspeed limiter is equipped with a solenoïd which makes feather the
propeller when the THROTTLE is in condition mode.
PIM - DO NOT USE FOR FLIGHT OPERATIONS