ATA 28 - Fuel

Question 1

Refueling is possible if the aircraft batteries are the only source of power ?

Answer 1

True

Question 2

Describe logic of the center tank pump mode SEL switch in AUTO

Answer 2

Center tanks pump:
- ON for self test for 2 min
- OFF until slats/flaps retracted
-ON until Center pump dry for 5 min

Question 3

Fuel transfer from the outer compartment to the inner compartment of the wing tanks occurs when the inner compartment quantity decreases to XXX kg ?

Answer 3

750 kg

Question 4

When the Fuel Used indication on ECAM is reset ?

Answer 4

At engine start, ENG MASTER ON

Question 5

When the fuel quantity indication on ECAM for the outer cell is boxed amber ?

Answer 5

When both transfert valves failed to open when inner tank level is low

Question 6

When does an amber line appear across the last two digits of the ECAM FOB indication?

Answer 6

When fuel quantity is unreliable

Question 7

From which tanks will fuel gravity feed be able?

Answer 7

Outer and inner tanks

Question 8

Where APU fuel line is feeded ?

Answer 8

Left part.

Question 9

Refueling time at normal pump pressure is XX minutes for the wing tanks and XX minutes for all tanks.

Answer 9

17min
20min

Question 10

After engine shutdown, what are your actions to close the fuel transfer valves?

Answer 10

No action is required. The valves will close automatically during the next refueling.

Question 11

Description of the fuel tank system ? A320/A321

Answer 11

Cf diagram

Question 12

What amount of dilatation maximum permitted ? (Surge tanks)

Answer 12

~ 2% /20°C

Question 13

Aprox. capacities of the fuel tanks ?

Answer 13

~ 18,6 -19 t
~ 6t / wings and 6,5t center

Question 14

Fuel consumption logic ? A320/A321 ?

Answer 14

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

Question 15

LO LVL warning is independent of FQI signal ?

Answer 15

True. Controlled by FLSCU ( Fuel level sensing control unit)

Question 16

|FOB
Signification ?

Answer 16

Some fuel is unavailable (CTR TK pumps failed, outer transfert valves failed closed ).

Question 17

Fuel level for WING TK LO LVL warning ?

Answer 17

750kg

Question 18

Conditions for mode SEL FAULT for fuel overhead ?

Answer 18

CTR fuel > 250kg
WING <5000kg
CTR pump OFF

Question 19

Logic of the automatic refuel ?

Answer 19

OUTER first then spill into INNER. Transfer valves closed.
If necessary CTR tanks are filled necessary

Question 20

Electrical transient may stops auto refuel ? You have to reselect fuel again sometimes ?

Answer 20

True

Question 21

All fuel pumps switches being on “ON” position, are wing tank pumps running while center tank is suplying ?

Answer 21

Yes, always running. Pressure reduction valve make priority on center tank pumps

Question 22

What happens to the IDG cooling fuel when the wing tank is full ?

Answer 22

The system automatically selects CTR TK PUMPS to “OFF”, WING TK PUMPS feed until the engine have used approx. 500 kg (250kg on A321)

Question 23

When the center tank is empty (MODE SEL AUTO), center tank pumps stops after 10 min after LO LVL. True or False ?

Answer 23

False. 5 min.

Question 24

What is the signification of an amber triangle between Outer and Inner tanks on the ECAM ?

Answer 24

Xfer valves open while commanded closed

Question 25

If FUEL WING TK LO LVL Ecam alert in final approach, you have to go around and perform the Fuel imbalance procédure. True or False ?

Answer 25

False. You have sufficient fuel to perform approach and go around (see FAQ A320)