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A320 Systems > Fuel System > Flashcards

Fuel System Flashcards

1
Q

What is the total fuel capacity?

A

41,285lbs

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2
Q

Center tank capacity?

A

14,281lbs

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3
Q

Each inner tank?

A

11,982lbs

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4
Q

Each outer tank?

A

1,520lbs

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5
Q

When does fuel transfer from the outer to inner tanks?

A

when inner tank level is at 1650 lbs OR when outer tank is overfilled

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6
Q

What is significant about the outer tanks?

A

They can not directly supply fuel to the engine

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7
Q

What happens when the inner fuel tank pumps fail?

A

Suction valves in the inner tanks allow gravity fuel feeding to the engine

Note: Gravity feeding is not available from the center tank.

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8
Q

When fuel is used to cool the IDGs, where is the heated fuel deposited?

A

Outer wing tanks, when full return spill valve returns fuel to the inner tanks

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9
Q

What does it mean if the fuel quantity is boxed in amber?

A

The fuel is unusable

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10
Q

When will the fuel quantity pulse?

A

The difference between fuel quantities in the fuel tanks is greater than 3300lbs, the higher value pulses.

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11
Q

What does it mean when FOB has a half amber box around it?

A

Some fuel is trapped

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12
Q

What does the REFUELG memo mean?

A

The refueling panel door is open, not necessarily that you are currently refueling.

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13
Q

What does the FAULT light on the CTR TK MIDE SEL pb mean?

A

Center tank > 550lbs and either wing <11000lbs

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14
Q

What do the FAULT lights on the pump pb mean?

A

Low Fuel Pressure

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15
Q

How long does it take to refuel?

A

17 to fill wings, 20 to fill all tanks

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16
Q

When fueling what tanks fill first and why?

A

Outer tanks fill then spill inboard to maintain balance.

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17
Q

When does the center tank fill?

A

When fuel load is > 27,004lbs

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18
Q

What is significant with the center tank pumps?

A

Although all pumps are on, the center pumps run at a higher pressure to utilize center tank fuel FIRST

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19
Q

Since the Center tank is used first but IDG cooler returns fuel to the wind, what will the system do if the inner tank reaches an overfill level?

A

The pump for the corresponding side on the center tank will shut off and fuel will be drawn from the inner wing.

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20
Q

What will happen when slats are selected or if center tank is low for 5 minutes?

A

Center tank pumps deactivate with slats, thus you will only run off the wings during TO and landing.

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21
Q

The center tank always depletes first, when are the center tank pumps deactivated?

A

5 minutes after center tank low level

Slats are extended

Overfill of the inner wing tank

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22
Q

When the outer fuel tanks transfer to the inner, ~ how much flight time is remaining?

A

1 hour

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23
Q

In the A321, where is fuel always pulled from?

A

Respective wing tanks only, motive flow pulls fuel out of the center tank.

Note: there is only one wing tank per side on the A321

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24
Q

(A321) The wing tank is full, when will the transfer valves allow fuel from the center tank to refill the wing tank?

A

When the wing tank is reduced by 550 lbs

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25
Q

(A321) If ACTs are installed in what order are they depleted?

A

ACT1 to center
ACT2 to center
Center to Wing

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26
Q

(A321) How is fuel transferred from the ACT to the center tank?

A

Positive Cabin Air Press

It will transfer to center tank when center tank high level is not sensed for 10 minutes

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27
Q

(A321) What is the warning when manually selecting the CTR TK MODE SEL pb?

A

You are responsible for monitoring the center and wing tank fuel levels

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28
Q

(A321) Only when would you get a FAULT on the CTR TK XFR pb?

A

Only when the center tank overflows, NOT when you have a transfer failure.

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29
Q

(A321) Fuel is transferred from the ACTs automatically when:

A

Aircraft is in flight

Slats retracted

ACT contains fuel

Center tank high level not activated for 10 minutes

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30
Q

From the centre tank or the inner wing tanks to the engines.

A

With tanks full, and all pumps on, which tanks are feeding the engines initially?

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31
Q
  • When slats are extended, 2 mints after engine start (T/O memo), inner tanks are full.- When the slats are retracted. And when 500kgs used from the wing (inner) tanks.
A

What causes, before T/O, the CTR pumps to automatically shutdown? And when do the CTR pumps resume operation?

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32
Q
  • Two electrical transfer valves are mounted in each wings to permit fuel transfer form outer to inner tank.- Automatically opens when inner tank low (750kgs).
A

How many transfer valves are there? When do they open?

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33
Q

They will automatically close cut the next refuelling operation.

A

When do the transfer valves close?

34
Q

Some of the fuel supplied to each engine goes from the HP fuel line in that engine, through the IDG heat exchanger, to the fuel return valve and to the outer fuel tanks.

A

How are the IDG (Integrated Drive Generator) cooled?

35
Q

If the outer tank is full, the fuel overflows to the inner tank through a spill pipe. If the centre tank is feeding, the wing tanks tend to overfill and the system auto turn off CTR TK PUMP when inner tank is fuel. Re-open when inner tank fuel has been used approximately 500kg.

A

How is space made, in the wing tanks, to receive fuel from the IDG cooling system when the CTR tank is not empty?

36
Q

Amber light, ECAM caution comes on when centre tank has more than 250kg of fuel, and the left or right wing tank has less than 5000kg.

A

What causes a FAULT light to illuminate in the MODE SEL switch?

37
Q

HI LVL: HI LVL lights come on if high level sensors and associated circuits are serviceable.LTS: lights on panel and all 8’s on FQI and preselector come on.

A

What happens when the refuelling TEST switch is pressed.

38
Q

Pump contractor is off, and auto shut-off is required. (pump off + selected off)

A

What is indicated on the SD, by a fuel pump indication of cross-line (green)?

39
Q

Outer tank: both transfer valve fail to open when inner tank is at low level. (Inner tanks can be gravity feed).Centre tank: both centre tank pumps are failed, or are switched off. (Centre tanks cannot be gravity feed).

A

On the SD what is indicated by a tank fuel quantity indication being boxed amber?

40
Q

The FQI is inaccurate.

A

The amber line through last two digits the fuel quantity indicated what?

41
Q

It is automatically reset, when the engine, is started on the ground.

A

When does the fuel used indication reset to zero?

42
Q

If the temperature is >45 degrees for the inner cell, >55 degrees for the outer cell or

A

What causes a fuel tank temperature indication to go amber?

43
Q

Part of the fuel is unusable (inter-cell transfer valve failure or loss of centre tank pumps).

A

What is indicated by a half-box (amber) on the FUEL quantity on the EWD and SD?

44
Q

REFUELG appears in green, when the door of the refuel control panel on the fuselage or on the wing is open.

A

REFUELG on the EWD means what?

45
Q

In green, if at least one centre tank pump is energized.

A

What does CTR TK FEEDG mean on the EWD?

46
Q
  • In green if at least one transfer valve is open in own wing tank (1 out of 4).- All 4 should open, if both in the same wing fail to open, then an ECAM warning comes up.
A

What is indicated by OUTER TK FUEL XFRD on the EWD?

47
Q

1500kg, and no wing tank low-level warning

A

What is the minimum fuel quantity for take-off?

48
Q

The fuel temperature indication appears when its associated temperature sensor is wet. It is normally green. Advisory only in phases 2 and 6 when fuel temperature is above 45°C for the inner cell or 55°C for the outer cell or below -40°C.

A

How does the fuel temperature indication on the ECAM FUEL PAGE work?

49
Q

Two electrical transfer valves are mounted in each wing to permit fuel transfer from outer to inner tank.

A

What is the purpose of the transfer valve?

50
Q

Outer cell of the wing tanks and inner cell of the wing tanks.

A

From which tanks will fuel gravity feed?

51
Q

The fuel system stores fuel in the tanks supplies fuel in the correct quantities to the fuel tanks during refuelling supplies fuel to the engines and the APU circulates fuel to cool the IDG and keeps fuel in the outer wing tank for wing bending and flutter relief.

A

What are the main tasks of the fuel system?

52
Q

A special fuel pump supplies fuel for APU start up when fuel feed pressure is low (due to loss of tank pumps or loss of normal AC electrical supply). This pump normally runs off the AC ESS SHED but runs off the AC STAT INV BUS if the AC ESS SHED fails.

A

How does the APU fuel feed work?

53
Q

It is a reminder to show that an outer transfer valve is open.

A

The message OUTER TK FUEL XFRD appears in the MEMO. What does it mean?

54
Q

To ensure that the engines are fed from the wing tanks for takeoff.

A

Why do the center tank pumps switch off automatically when the slats are extended for takeoff?

55
Q

The ‘standard’ refuelling point is under the right wing a second refuelling point under the left wing is optional.

A

Where is the refuelling point?

56
Q

The transfer valves open automatically when the inner tank reaches the low level (about 750kg/1650lb) thus enables the fuel to drain from the outer to inner tanks. Two level sensors are installed in each inner tank. Each sensor controls two transfer valves one in each wing ensuring simultaneous transfer to both wing tanks. When open the valves are latched open. They will automatically close at the next refueling operation.

A

When does the fuel transfer start from the outer to the inner tanks?

57
Q

Center tank inner tanks (down to 750kg in each inner tank) outer tanks (fuel transfered into the inner tanks).

A

What is the fuel feed sequence for the A320?

58
Q

The Fuel Quantity Indication is inaccurate.

A

What does an amber line across the last two digits of the fuel quantity mean?

59
Q

The cross feed valve controlled by a double motor allows both engines to be fed from one side or one engine to be fed from both sides.

A

What is the purpose of the cross feed valve?

60
Q

At least one CTR TANK pump delivers fuel to the engines.

A

The message CTR TK FEEDG appears in the MEMO. What does it mean?

61
Q

The transfer valves have been opened automatically by the low level sensor in the inner tank.

A

How is the fuel transferred from the outer to the inner tanks?

62
Q

18,728kg or 41,285lb.

A

What is the total usable fuel for the A320 (SG 0.785kg/l or 6.651lb/US Gal.)?

63
Q

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

A

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

64
Q

ON:Pump is ON.OFF:Pump is OFF and OFF button lights up white.FAULT light:Low delivery pressure. It does not come on when OFF is selected.

A

L (R) TK PUMPS pb
(FUEL Panel)

  • ON
  • OFF
  • FAULT Light
65
Q

AUTO:Control of center tank transfer valves is automatic.- They open if the associated wing tank is not full.- They close automatically 5 min after the center tank reaches low level.MAN: Flight crew controls the center tank transfer valves manually with CTR TK XFR pb.FAULT light:- The center tank has more than 550 lb of fuel and the left or right wing tank has less than 11000 lb and- The MODE SEL pb is at AUTO

A 
MODE SEL pb
(FUEL Panel) (A321)
- AUTO
- MAN
- FAULT Light
66
Q

ON:- The transfer valve opens if MAN mode is selected with the MODE SEL pb.- The transfer valve is controlled automatically when the flight crew selects AUTO mode.OFF:The transfer valve is closed.FAULT light:Associated wing tank overflows.

A

CTR TK L(R) XFR pb
(FUEL Panel) (A321)

  • ON
  • OFF
  • FAULT Light
67
Q

ON:- Pump is automatically controlled if the MODE SEL pb is in the AUTO mode.- Pump is running if the MODE SEL pb is in the MAN mode.OFF:Pump is OFF and the OFF button lights up.FAULT light:Pump is in operation and the delivery pressure drops.

A

CTR TK PUMP 1(2) pb
(FUEL Panel) (A319/A320)

  • ON
  • OFF
  • FAULT Light
68
Q

OFF:The valve closes, and button does not light up.ON:The valve opens, and the ON button comes on white.OPEN Light:Green light comes on, when the valve is fully open.

A

X FEED pb
(FUEL Panel)

  • OFF
  • ON
  • OPEN Light
69
Q

AUTO:Control of the ACTs transfer is automatic.- The automatic forward transfer occurs, if:• The aircraft is in flight, and• The slats are retracted, and• At least one ACT low level sensor is wet, and• The center tank high level sensor has been dry for at least 10 minutes.- The automatic forward transfer stops, as soon as one of the above conditions is not met.FWD:Manual transfer to the center tank is initiated by opening:- The ACT transfer valve- The ACT 1 or 2 inlet valve.The ACT transfer pump is then commanded on.FAULT light:Amber light and associated ECAM caution come on, when:- The center tank has less than 6614 lb of fuel, and one ACT has more than 550 lb of fuel, and- The ACT pb is on AUTO.

A

ACT pb
(FUEL Panel)

  • AUTO
  • FWD
  • FAULT Light
70
Q

AUTO:Center tank pumps automatically deactivate when:- Inner wing tank reaches overfill level.- Slats are extended (except for 2 min after engine start they run).- 5 min after CTR TK low level is sensed.MAN:Center tanks are being operated manually.FAULT Light:Center tank contains more than 550 lbs and either wing tank is less than 11,000 lbs.

A

CTR TK MODE SEL pb
(FUEL Panel) (A319/A320)

  • AUTO
  • MAN
  • FAULT Light
71
Q

The refuelling control panel door is not closed

A

What does the REFUEL message on the ECAM indicate?

72
Q
  • For 2 minutes after both engines are started (if slats are retracted, pumps will continue to operate)- After Slat retraction- Continue to run for 5 minutes until the center tank is empty or slats are extended
A

With full fuel, when do the center tank fuel pumps operate?

73
Q

Automatically at the next refuelling operation

A

Once opened to transfer fuel, how are the fuel transfer valves closed?

74
Q
  • 2 in each wing tanks- 2 in the center tank- 1 APU pump to provide fuel to the APU when the left wing/center tank pumps are off
A

How many fuel pumps are installed?

75
Q

When the wing or center tank pumps are not on

A

When does the APU fuel pump run?

76
Q

Use center tank first, then the wing tanks

A

What is the normal in-flight fuel management scheme?

77
Q

When the inner tank quantity reaches 750kgs

A

When do the main tank outer cells drank into the inner tanks?

78
Q

Low fuel delivery pressure

A

What does an amber “FAULT” light in the FUEL PUMP pushbutton indicate?

79
Q

Yes, only from the inner wing tank cells

A

If the wing tank pumps fail, is suction feeding possible?

80
Q

Only during ground refuelling

A

Can fuel be transferred from one tank to another?

81
Q

Structural wing bending moment relief

A

Why are the outer wing tanks drained last?

82
Q

Some fuel is unusable

A

What does an amber boxed ECAM FOB indicate?

A320 Systems (21 decks)

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