ATA 28 - Fuel Flashcards
Refueling is possible if the aircraft batteries are the only source of power ?
True
Describe logic of the center tank pump mode SEL switch in AUTO
Center tanks pump:
- ON for self test for 2 min
- OFF until slats/flaps retracted
-ON until Center pump dry for 5 min
Fuel transfer from the outer compartment to the inner compartment of the wing tanks occurs when the inner compartment quantity decreases to XXX kg ?
750 kg
When the Fuel Used indication on ECAM is reset ?
At engine start, ENG MASTER ON
When the fuel quantity indication on ECAM for the outer cell is boxed amber ?
When both transfert valves failed to open when inner tank level is low
When does an amber line appear across the last two digits of the ECAM FOB indication?
When fuel quantity is unreliable
From which tanks will fuel gravity feed be able?
Outer and inner tanks
Where APU fuel line is feeded ?
Left part.
Refueling time at normal pump pressure is XX minutes for the wing tanks and XX minutes for all tanks.
17min
20min
After engine shutdown, what are your actions to close the fuel transfer valves?
No action is required. The valves will close automatically during the next refueling.
Description of the fuel tank system ? A320/A321
Cf diagram
What amount of dilatation maximum permitted ? (Surge tanks)
~ 2% /20°C
Aprox. capacities of the fuel tanks ?
~ 18,6 -19 t
~ 6t / wings and 6,5t center
Fuel consumption logic ? A320/A321 ?
A320
ACT —-> CTR —-> INNER <—- OUTER
ctr sensor | inner = full-500kg inner<750kg
dry for 10min
A321
ACT —> CTR —-> WING
ctr sensor inner full-250kg
dry for 10 min
LO LVL warning is independent of FQI signal ?
True. Controlled by FLSCU ( Fuel level sensing control unit)
|FOB
Signification ?
Some fuel is unavailable (CTR TK pumps failed, outer transfert valves failed closed ).
Fuel level for WING TK LO LVL warning ?
750kg
Conditions for mode SEL FAULT for fuel overhead ?
CTR fuel > 250kg
WING <5000kg
CTR pump OFF
Logic of the automatic refuel ?
OUTER first then spill into INNER. Transfer valves closed.
If necessary CTR tanks are filled necessary
Electrical transient may stops auto refuel ? You have to reselect fuel again sometimes ?
True
All fuel pumps switches being on “ON” position, are wing tank pumps running while center tank is suplying ?
Yes, always running. Pressure reduction valve make priority on center tank pumps
What happens to the IDG cooling fuel when the wing tank is full ?
The system automatically selects CTR TK PUMPS to “OFF”, WING TK PUMPS feed until the engine have used approx. 500 kg (250kg on A321)
When the center tank is empty (MODE SEL AUTO), center tank pumps stops after 10 min after LO LVL. True or False ?
False. 5 min.
What is the signification of an amber triangle between Outer and Inner tanks on the ECAM ?
Xfer valves open while commanded closed
