Day 6 - Elec, Fuel & Nav Flashcards

1
Q

What is the minimum speed for the RAT?

A

140kts

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2
Q

How many aircraft batteries are there?

What’s their Voltage and Amps?

A

2 x nickel cadmium batteries

28v 23AH

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3
Q

AC ESS BUS is typically powered by AC BUS 1; but can it also be powered by AC BUS 2?

A

Yes

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4
Q

What are the 2 conditions for disconnecting the IDGs?

A

Cannot press it for more than 3 seconds

The engine must be windmilling

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5
Q

When will the IDG fault light illuminate?

A

If oil temp exceeds 180 degrees C

Low oil pressure (but not when N2 is below 14%)

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6
Q

How long does the RAT take to extend?

A

5 seconds for extension, plus an additional 3 seconds for power supply.

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7
Q

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

A

2 fuel pumps and 1 igniter

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8
Q

How long does the APU take to auto shut down after providing air conditioning?

A

60-120 seconds at 75%

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9
Q

In order for the RAT to auto deploy, what must fail?

A

Lose AC BUS 1 and 2, and you must be above 100kts

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10
Q

With only the emergency GEN operating, what bus bars are available?

A

AC ESS BUS and DC ESS BUSS via the ESS TR

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11
Q

Below 100kts, the DC BAT BUS is automatically connected to and powered by…?

A

The batteries

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12
Q

Are these colour CBs monitored…?

  • green
  • black
  • red
A

Green - monitored (for more than 1 min, triggered on the ECAM)

Black - non-monitored

Red - reset by maintenance only

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13
Q

What do the following CB collar colours mean?

Black? Yellow? Red?

A

Black - System perm deactivated or not installed

Yellow - system deactivated as deferred defect

Red - CVR/FDR deactivated in accordance

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14
Q

Why do Wing tip brake CBs have red caps?

A

To prevent them being reset

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15
Q

Power supply priority?

A

1 Gens
2 GPU
3 APU

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16
Q

When will a battery fault light illuminate?

A

When the charging current for the corresponding battery is outside of limits

In this case the contractor opens.

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17
Q

Is the TAT probe heated?

A

Inflight yes, but not on the ground

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18
Q

How long to align the ADIRS?

A

At least 7mins

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19
Q

3 methods of tuning NAV aids?

A

Automatic
Manual
Back up

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20
Q

The “on bat” light on the ADIRS is on when?

A

Beginning of a complete IRS alignment

Batteries supply At least one ADIRU

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21
Q

ADIRS 1 usually supply’s which PFD & ND?

A

Captains side

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22
Q

ADIRS 3 can provide data to which PFD/ND?

A

Either CPT or FO

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23
Q

How do we normally tune nav aids?

A

Via the MCDU in Automatic

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24
Q

The ISIS gets Pitot and static data provided by which Pitot and static port?

A

Sby pitot

Sby static ports

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25
Q

TAT 1 (captains) supplies which ADIRS?

A

ADIRS 1 and 3.

26
Q

Which ADIRS does TAT 2 (FOs) supply data to?

A

ADIRS 2

27
Q

For a CAT 3 single and dual approach, how many RAD ALTs are required?

A

2

28
Q

If you have lost 1 RAD ALT, what cat approach are you limited to?

A

Limited to a CAT 2 approach

29
Q

What does a flashing IR fault light mean?

What does a permanent IR fault light mean?

A

Attitude and heading into may be recovered in ATT mode

The IR is lost and when turned off, FAULT light goes out

30
Q

Max allowable speed difference between ADIRS 1 and ADIRS 2?

A

6kts

31
Q

What is the role of the A320 fuel system?

A

6 parts
- store fuel (in tanks)

  • supplies fuel in correct quantity to tanks during refuelling
  • supplies fuel to engines & APU
  • circulates fuel to cool IDG
  • controls transfer of fuel from centre to wing inner tanks
  • keeps fuel in outer wing tanks for wing bending and flutter relief
32
Q

What are vent tanks for?

A

To allow for fuel expansion. Anything over 2% max uplift and it begins venting

33
Q

If fuel temp increases by 20 degrees C, what % does its volume increase by?

A

2%

34
Q

Minimum fuel for takeoff?

A

1500kgs

35
Q

How can we close the LP fuel valve?

A

Engine master switch and fire push button

36
Q

What happens if all electric fuel pumps begin to fail on the aircraft?

A

Gravity fed fuel. Not suction fed!

37
Q

Fuel feed sequence?

A

Centre tank
Wing inner tank
Wing outer tank

38
Q

How many refuelling panels and refuelling couplings are there?

A

2 refuelling panels

2 refuelling couplings

39
Q

Does the aircraft have gravity refuelling points? If so, where?

A

Yes and in the outer tanks

40
Q

What controls automatic refuelling of the aircraft?

A

FQI

41
Q

What colour is the fuel cross feed “on” light?

A

White

42
Q

How long do the centre tank pumps run for when the tank is empty?

A

5mins

43
Q

Flashing green “end” light on the refuelling control panel indicates?

Solid green “end” light indicates?

A

Refuelling has been aborted

Refuelling is completed

44
Q

Where does the fuel feed from for the engines?

A

Inner wing tank with 2 pumps

45
Q

What weight of fuel must the inner tanks drop by, before the centre tank begins refuelling the inner wing tanks?

A

500kgs used in the inner tanks, then the centre feeds the fuel into the inner tank

46
Q

At what fuel imbalance (in KGS) will the tank quantity begin flashing green?

A

When it detects an imbalance of at least 1500kgs

47
Q

When does the fuel used reset?

A

At engine start

48
Q

To cross feed fuel, which tank LP fuel pump must be turned off?

A

The side with the low fuel

49
Q

During a fuel imbalance, which side flashes?

A

The fuller tank flashes green

50
Q

Total usable fuel?

A

24,209Litres

51
Q

At what fuel weight do the transfer valves open?

A

When either inner tank reaches approx. 750kgs, which is when both inner tank valves open (as they open simultaneously, controlled by the FLSCUs).

52
Q

What power supply is the AC engine generator and DC system?

A

AC system : three phase 90 KVA 115/200V 400hz

DC system : 28V

53
Q

What are the AC Electrical Power Sources?

A

2 engine generators
One APU
Emergency Generator (RAT)
External power
Static inverter

54
Q

If all AC sources are INOP, what takes over to supply limited power?

A

A static inverter will convert DC power from BAT 1 for limited use

55
Q

If the APU and 2 ENG generators fail, what takes over?

A

The RAT can supply AC and DC

56
Q

What are the IDG’s?

A

Integrated Drive Generators.

Driven at a constant speed.

Providing 3-phase 115 and 200VAC at 400hz.

Each IDG can supply up to 90KVA.

Take priority over all other power sources.

57
Q

What computer controls the engine gens?

A

GCU 1 or 2 respectively

Generator control unit.

58
Q

What computer controls the APU GEN?

A

The GAPCU

Ground Auxiliary Power Control Unit

59
Q

IDG fault light illuminates when outlet oil temp exceeds? And when what is low?

A

180 degrees C

Oil pressure is low (inhibited when N2 below 14%)

60
Q

TRs do what?

A

Transfer AC to DC

61
Q

When will the RAT auto extend?

A

Loose both AC bus 1 and 2 and speed greater than 100kts