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Airbus > Electrics, Nav & Fuel > Flashcards

Electrics, Nav & Fuel Flashcards

1
Q

What is the IDG?

A

Integrated Drive Generator

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2
Q

When does the RAT deploy automatically?

A

With the loss of AC Bus 1 and AC Bus 2 and above 100 kt

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3
Q

What is the minimum speed for the RAT?

A

140 kt

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4
Q

What are the DC batteries rated at?

A

24 V and 23 AH

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5
Q

Why do you get an IDG fault light?

A

When the oil temp is too high - above 180 degrees

When oil pressure is low (but only when N2 is above 14%)

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6
Q

What colour are monitored circuit breakers?

A

Green

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7
Q

What colour are unmonitored circuit breakers?

A

Black

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8
Q

What is the red circuit breaker?

A

Wing tip brakes - they are monitored

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9
Q

What is the order of priority for power?

A

1) Engines
2) GPU (if selected)
3) APU

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10
Q

How long can you press the IDG button for?

A

3 secs

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11
Q

How long will the APU take to shut down after using the air conditioning?

A

120 secs

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12
Q

Why does the battery fault light illuminate?

A

There is a fault with the battery charge limiter.

ECAM alert

Charging current for the corresponding battery is outside limits - battery contactor opens

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13
Q

What happens if AC BUS 1 fails?

A

AC BUS 2 can supply AC ESS BUS

ESS TR can supply DC ESS BUS

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14
Q

Are the TAT probes heated?

A

Yes - but not heated on the ground

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15
Q

What does GPS1 supply?

A

ADIRU 1 and ADIRU 2

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16
Q

What happens if GPS 1 fails?

A

GPS 2 can supply

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17
Q

What are the three methods of tuning navaids?

A

1) automatic - via MCDU
2) manual
3) back up

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18
Q

How many radalts?

A

two

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19
Q

What is the max speed difference between ADIRU 1 and ADIRU 2 on the PFD?

A

6 kt

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20
Q

What capabilities with one radalt failed?

A

Cat II ILS

21
Q

What is the role of the fuel system?

A
  • Store fuel in the tanks
  • Supply fuel in correct quantities to tanks during refuelling
  • Supply fuel to the engines and the APU
  • Circulate fuel to cool the IDG
  • Control transfer of fuel from centre to wing inner tanks
  • Keep fuel in outer wing tanks for wing bending and flutter relief
22
Q

What is the use of the vent tanks?

A

If the fuel has a temp rise of 20 degrees, the fuel can expand by 2% without spilling

23
Q

What is the minimum fuel?

A

1500 kg

24
Q

How can you close the LP valves?

A
  • the engine master switch
  • the ENG FIRE PUSH pb
25
Q

What is the use of the suction valves?

A

They allow engines to be gravity fed if the inner tank pumps fail

26
Q

What is the fuel feed sequence?

A

1) centre tank - fuel transfers to the inner tanks
2) wing inner tanks - each inner tank empties down to 750 kg
3) wing outer tanks - fuel transfers into the inner tanks

27
Q

How many refuel panels and couplings?

A

Two refuel panels and two couplings

28
Q

When will the centre tank pumps close?

A

5 minutes after the centre tank is empty

29
Q

What colour is the crossfeed ON light?

A

White light - illuminates when the valve starts to open

30
Q

What colour is the crossfeed OPEN light?

A

Green light - illuminates when the valve is fully open

31
Q

What does the green END light mean on the refuelling control panel (illuminated steady and flashing)?

A

illuminated steady = refuel is complete

flashing = refuelling has been aborted

32
Q

When will you get an imbalance advisory?

A

When there is a difference of 1500 kg

33
Q

When does the ‘fuel used’ reset?

A

On engine start

34
Q

From which tank do the engines get fuel?

A

Inner tank

35
Q

When will the centre tank fill the inner tank?

A

When 500 kg has been used

36
Q

How long does the RAT take to extend?

A

5 seconds to extend and 3 seconds to supply power

37
Q

If gen 1 line is off, what does it still supply power to?

A

two fuel pumps and one igniter

38
Q

How long does it take to align the ADIRS?

A

7 minutes

39
Q

Why does the ‘on battery’ light come on for the ADIRS?

A
  • beginning of an IRS alignment
  • one is being powered by the battery
40
Q

What does ADIRU 1 usually supply?

A

PFD1 and ND1

41
Q

To crossfeed fuel, which tank’s fuel pump must be switched off?

A

The side low on fuel

42
Q

During a fuel imbalance, which tank flashes green

A

The more full tank

43
Q

How many fuel pumps?

A

Four main fuel pumps

In normal ops, each engine is supplied from two pumps in its own side inner tank

44
Q

What is the purpose of the crossfeed valve?

A

Allows both engines to be fed from one side or one engine to be fed from both sides

45
Q

What is the FQI?

A

Fuel Quantity Indication System

  • transmits actual total fuel mass, quantity and temperature to the ECAM
  • controls automatic refuelling

Has two channels, channel 2 will activate if channel 1 fails

46
Q

What does the fuel tank inerting system do?

A

Produces an oxygen-depleted air that goes into the centre tank to replace the ambient air, to reduce flammability

47
Q

When will you get a fuel quantity advisory?

A

In flight phases 2 and 6 with a difference of more than 1500 kg - wing inner and outer tank indications will pulse with the highest fuel level

48
Q

When will a half amber box appear around FOB?

A

When the displayed quantity is not all usable

49
Q

Why will the FOB indication be displayed with two dashes across the last two digits?

A

The FQI is in degraded mode

Airbus (14 decks)

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