FUEL - ATR 72 | Take the Quiz

Engine running, the illuminated light "Feed LO PR" associated with the CCAS activation can mean:

A) The double pump failure (Jet pump and electrical pump

B) A Leak in the fuel circuit

A or B

In normal operation, the electrical pump in each tank is used to

Start the engine - which pressurizes the jet pump via its HMU for subsequent pressurized the fuel system

Pressurize the jet pump which pressurizes the fuel system for engine start and subsequent normal operation

Provide additional fuel flow required for take-off since the jet pump alone is not able to maintain such high rate of flow

On the refuel/defuel panel, which valve should be set on the "selected qty" indicator (pre-selection)?

The total desired (including what is already onboard)

Total refuel to be added

Fuel to be added per tand

LO LVL amber light and CCAS activation means that:

Fuel quantity becomes lower that 160kg(252 lbs)

The corresponding electrical pump runs automatically

All of the above

Each electrical pump can supply one engine throughout the a/c fight envelope.

False

True

True but only with cross feed

When does the jet pump's motive flow valve open?

Anytime the related 'pump' push button is in (depressed)

Anytime the related 'pump' push button is (depressed and the pressure from the HMU is sufficient to open it

Whenever the electrical pump output is low

When does an electric pump normally stop?

When push button is released at "OFF" position

When jet pump pressure is above 7psi and the pump push button depressed

Both of the above is correct

How is the LP valve at outlet of each fuel tank controlled?

Mechanically by the related fire handle

Electrically by the related fire handle

By the related condition lever

How is the HP valve at the HMU controlled?

Mechanically by the related fire handle

Electrically by the related fire handle

By the related condition lever

During X-feed operations what pumps are in operation?

2 Jet pumps

2 electrical pumps

1 electrical and 1 jet pump

FUEL - ATR 72