Fuel system Flashcards
How many tanks are there?
2, one in each wing
Each tank is fitted with:
– a vent surge tank to ensure positive pressure and allows a thermal expansion without spillage
– a main wing tank
– a feeder tank, always full to protect the engine feed system against negative or lateral load factors
Fuel quantity:
- 4500 kg ATR 42-500
- 5000 kg ATR 72-500
The FEED LO PR amber light extinguishes when …
the pressure is > 4 psi on the line.
When the Engine Feed Jet Pump outlet pressure reaches … , the electrical pump is de-energized after … time delay.
8.5 PSI / 30s
In normal operation of the fuel system, the engine is only supplied by the …
Engine Feed Jet Pump and the electrical pump is de-energized.
Two cases of low level:
– LO LVL with fuel quantity indicator 160 kg → Feeder tank not full due to a failure of the feeder jet pump.
In this condition, the fuel is transfered from the main tank to the feeder tank through the flappers.
In case of engine fire, when corresponding engine fire handle is pulled, it closes …
The associated LP shut off valve.
FEED LO PR
- Delivery pressure
PUMP
Control electrical pump power and jet pump motive flow valve.
Runs automatically if:
– jet pump press 160 kg, but the feeder tank is not full (Feeder jet pump failure)
– during fuel quantity test
LO LVL Lt
– When the quantity is 160 kg, but the feeder tank is not full (Feeder jet pump failure)
TEST pb
When pushed in, displays all 8’S + LO LVL LTS + CAP + elect pumps energized.
Refuel valves auto close.
FUEL X FEED
Illuminates as soon as the fuel crossfeed is selected on.
Tank fuel temperature, the device is installed in the …
Left feeder tank, and it’s displayed on the overhead panel
FUEL TEMP indicator values …
- yellow sector: -54 deg to 0 deg
- green sector: 0 deg to 50 deg
- yellow sector: 50 deg to 57 deg
- red dash: 57 deg
