27. FUEL Panel Flashcards
What is the normal in‐flight fuel management scheme?
Use center tank first, then the wing tanks.
How many fuel pumps are installed?
o 2 in each inner wing tank
o 2 in center tank
o 1 APU pump to provide fuel to the APU when the tank pumps are off
When do the wing tank fuel pumps run?
Continuously when in the ON position (lights out).
When the Center Tank Pump MODE Select pushbutton is in the AUTO mode (lights out), what is the logic for center tank pump operation?
With fuel in the center tank the pumps will:
Perform a momentary self‐test after engine start.
The pumps stop operating after slat extension and resume operation after slat retraction.
The pumps are automatically shut off a few minutes after the center tank empties.
They will also shut off momentarily to make room in the wing tanks for IDG cooling return fuel.
What is center tank fuel pump logic when in MAN mode?
o The pumps operate continuously when they are selected ON with electrical power available.
o No auto shutoff logic
What will cause a FUEL MODE SEL FAULT light?
o Failure of the AUTO mode
o Center tank contains more than 550LBS and either main tank has less than 11,000LBS.
When do the main tank outer cells drain into the inner tanks?
When the inner tank quantity reaches a predetermined low level (approx. 1650LBS)
If only one inner tank reaches that low level, what happens to the other transfer valve?
All 4 transfer valves open.
Once opened to transfer fuel, how are the fuel transfer valves closed?
Automatically at the next refueling operation.
What does an amber FAULT light in the FUEL PUMP pb indicate?
Low fuel delivery pressure
If the wing tank pumps fail, is gravity feeding possible?
Yes
Can the center tank gravity feed?
No
Can fuel be transferred from one tank to another?
Only on the ground using FCOM procedure
When does the APU fuel pump run?
When the wing or center tank pumps are not on.
What does an amber boxed ECAM FOB indicate?
Some fuel is unusable.
