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Pilot's Operating Handbook
Section 7
Description
Edition 1 - January 15, 2018
Rev. 5
Page 7.7.8
Main mechanical boost pump
The mechanical boost pump is attached to accessory gearbox and supplies fuel
necessary for engine operation.
Engine fuel system
The engine fuel system consists of a fuel regulator, pumps, filters, a fuel divider and
fuel nozzles. The system provides the fuel flow necessary to satisfy the engine power
and rating needs.
The fuel coming from airplane system goes through a heater which is automatically
controlled by a thermostatic valve.
Fuel gaging installation
Fuel quantity is measured using capacitive-type sensors. Fuel quantity is displayed in
US gallons. Three fuel level gauges are installed in each tank. The wing root side fuel
level gauge is equipped with a low level detector which leads to fuel low level CAS
messages appearance, when usable fuel quantity remaining in the concerned fuel
tank is under about 9 USG (34 Litres).
Fuel system monitoring
Fuel system monitoring is ensured by CAS messages :
-
FUEL OFF
: Fuel tank selector set to OFF
-
FUEL PRESS
: Fuel pressure at mechanical boost pump outlet
under 10 psi (
±
2 psi)
-
AUX BOOST PMP ON
: Electric fuel boost pump running (manual or
automatic mode)
-
FUEL LOW L-R
*
: Fuel quantity less than or equal to 9 USG
(34 Litres) of usable fuel in specified tank
-
AUTO SEL
: Fuel sequencer is inactive or a fault occured
-
FUEL IMBALANCE
: Fuel tanks imbalanced by more than 15 USG
(57 Litres) for more than 30 seconds
* Only affected side (L, R or L-R) displayed in CAS message
PIM - DO NOT USE FOR FLIGHT OPERATIONS