Fuel

Question 1

How many tanks are there on the A320 and what is the fuel capacity?

Answer 1

5 tanks
2 outer tanks
2 inner tanks
1 center tank
42,000 lbs

Question 2

Are the surge tanks displayed on the ECAM fuel page?

Answer 2

No

Question 3

Explain the normal fueling sequence

Answer 3

Outer tanks fill first, then inner tanks, then center tank

Question 4

Max fuel imbalance between inner tanks

Answer 4

3,300 lbs

Question 5

How many fuel pumps are there and where are they located?

Answer 5

6 total pumps
2 in each inner tank
2 in the center tank

Question 6

With fuel in the Center Tank, explain the normal (automatic) fuel feed priority.

Answer 6

With flaps fully retracted, center tank first then wing tanks

Only the wing tank pumps have pressure reducers (allow center pumps to preferentially supply the respective engine)

With flaps extended, center pumps shutoff

Question 7

Recall the function of the L & R TK PUMPS pbs.

ON (Lights out)

LO (Amber)

OFF (White)

Answer 7

On: pump runs continuously

LO: pump on but pump pressure low

OFF: pump is deactivated

NOTE: Wing tank pumps are not equipped with automated logic. Pump operation is commanded by its
respective pb’s and must always be manually controlled.

Question 8

Recall the function of the MODE SEL pb.

AUTO (light out)

MAN (white)

Answer 8

▪ AUTO (light out) – provided CTR TK PUMP pbs are selected ON (lights out), the center
tank pumps will be automatically activated and deactivated as
required by automated computer logic.
▪ MAN (white) – automatic pump activation/deactivation logic is off.
Center tank pumps must be manually controlled.

Question 9

ECAM indications when Center Tank fuel is being consumed.

Answer 9

o CTR TK FEEDG appears on the E/WD memo section.
o On the ECAM FUEL page, the center tank pump indications will be inline green.
NOTE: When the center pumps are commanded off, per computer logic, pump indications
will be horizontal green lines.

Question 10

Recall when the transfer valves will automatically open, allowing outer cell fuel to gravity feed into the respective
inner cell.

Answer 10

when either wing reaches 1,650 lbs

Question 11

Recall the ECAM indications when transfer valves are open.

Answer 11

▪ Transfer valve indications on the ECAM FUEL page appear in the horizontal position.
▪ OUTR TK FUEL XFRD (green) appears on the E/WD memo section.
NOTE: While the valves are in-transit, they appear as amber diagonal lines.

Question 12

Recall when will the F. USED indications reset to zero.

Answer 12

Automatically during engine start

Question 13

Recall the location of valve indications on the ECAM FUEL page.

Answer 13

o Crossfeed valve appears directly above the CTR text.
o APU fuel valve appears under the white APU.
o Engine Low Pressure fuel valves appear directly below
the engine’s fuel used quantity number.

Question 14

Recall the location of fuel temperature indications

on the ECAM FUEL page.

Answer 14

Below fuel quantities on the ECAM page. Center does not have temp indication

Question 15

Recall the controls and indications of the fuel Crossfeed Valve.

Closed (light out)

ON (white)

OPEN (green)

Answer 15

Closed (light out) – Valve is closed

▪ ON (white) – Valve has been commanded open

▪ OPEN (green) Valve is in the open position

▪ FUEL X FEED (green) appears on E/WD memo section.
▪ On ECAM FUEL page, the crossfeed valve appears as a horizontal in-line (green).

Question 16

Recall the indications of a degraded Fuel Quantity Indication (FQI) system.

Answer 16

Amber hash marks cover the last two digits of fuel quantity displays of the:
▪ FOB indication on the E/WD.
and
▪ The individual fuel tank quantities on the ECAM FUEL page.

Question 17

Recall the meaning of an amber half box surrounding the FOB indication on the E/WD.

Answer 17

There are three probable causes, all as the result of trapped fuel:

▪ Both center tank pumps have failed (with usable fuel in tank).

▪ Both center tank pumps have been turned off (with usable fuel in tank).

▪ A wing tank transfer valve has failed to open.