Pilot's Operating Handbook
Section 7
Description
Edition 1 - January 15, 2018
Rev. 2
Page 7.6.10
Engine air inlet
Engine air inlet is located at front lower section of engine cowling. Air inlet port is
protected against icing by a hot air flux provided by engine. Air is driven throughout a
duct in engine casing before entering engine through a protective screen. An inertial
separator system inside the air duct protects the engine from ingesting dense
particles (water, ice, fine gravels, sand).
Separator consists of two movable vanes. During normal operation, air is conducted
directly towards engine air inlet. To separate particles suspended in the air, vanes are
positioned to force engine induction air to execute a sharp turn : under the effect of
centrifugal force denser particles separate from the air and are discharged overboard
through two apertures located under engine cowling.
Operation of inertial separator vanes is electrically controlled by INERT SEP switch
located on DE-ICE SYSTEM panel. When INERT SEP switch is set to ON, an electric
actuator activates vanes ;
INERT SEP ON
lights on when vanes have reached
their maximum deflection and remains visible as long as switch remains ON. Full
deflection takes about 40 seconds. If the vanes do not reach the full deflection
50 seconds after activation or are not retracted 50 seconds after deactivation,
INERT SEP FAIL
is displayed in CAS window.
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.
PIM - DO NOT USE FOR FLIGHT OPERATIONS