Fuel Flashcards
The fuel system is designed so normal fuel feed sequencing is
Automatic
What is the maximum allowable fuel imbalance between inner tanks (inflight and landing) if the heavier tank is full
3,300 pounds
In flight with slats retracted, how is fuel sequenced to the engines with fuel in all tanks
Center tank pumps feed the engines first
In flight with MODE SEL in AUTO and fuel in the center tank, the center tank pumps
Run only if slats are retracted
When will the center tank begin to feed the engines after takeoff (if there is fuel int he center tank)
When the slats are retracted
In flight, with fuel MODE SEL in MAN, and the CTR TK pumps ON, what is the effect on the center tank pumps
The center tank pumps run continuously until turned off with the CTR TK pump switches
A fuel pump FAULT light indicates
Fuel pump low pressure
When should a tripped wing tank fuel pump circuit breaker be reset?
Never
A fuel MODE SEL FAULT light indicates
Center tank has more than 550 pounds of fuel AND the left or right wing tank has less than 11,000 pounds
The crossfeed valve is normally
closed
What do double dashes over the last two digits of the fuel on board (FOB) indication mean
The fuel quantity indication is still operative, but inaccurate
Which of the following would cause an amber half box to appear around the E/WD FOB display when the fuel quantity is not fully usable?
Transfer valve failure
Engines can be gravity fed
From the wing tanks only
If a fuel imbalance greater than 3300 pounds is detected, indications of the wing inner and outer tanks with the highest fuel level
Pulse green
A low level fuel warning may be triggered during steep descents, accelerations or decelerations due to
The transfer valves opening with more than 1650 pounds of fuel in each inner tank
When either inner wing compartment fuel quantity reaches 1650 pounds
At least one transfer valve in each wing opens
The fuel recirculation system uses fuel supplied to each engine for cooling the
IDG oil.
What happens when the recirculation fuel has filled a wing tank and the center tanks are supplying fuel to the engines
The center tank pump shuts off until 1100 pounds of fuel has been burned out of the wing tank
With the fuel MODE SEL switch in auto, both center tank pumps run(if there is fuel in the tank) for_____minutes after each engine reaches idle to verify operation
2
Each vent surge and inner wing tank is equipped with an over pressure burst disk that
Ruptures if the internal and external pressure differential exceeds a predetermined value
IDG heat exchanger return fuel is routed to the fuel return valve and then to the
Wing tank outer compartment
