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CL-604 > Fuel System > Flashcards

Fuel System Flashcards

1
Q

What is the capacity of the main fuel tanks?

A

4860lbs each
9720lbs total

Wing tanks. 4860# x2, 9720# total

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2
Q

What is the capacity of the aux fuel tanks

?

A

7168lbs

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3
Q

What is the capacity of the tail tanks?

A

3112lbs

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4
Q

What is the maximum permitted lateral fuel imbalance for taxi, take off and landing?

A

400lbs

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5
Q

What is the maximum permitted lateral fuel imbalance in flight?

A

800lbs

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6
Q

What is the minimum amount of fuel required for a go around?

A

500lbs per wing (assuming a maximum attitude of 10 degrees nose up)

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7
Q

What are the limitations when jettison?

A

Flaps must be at zero

Prohibited in known lightening conditions

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8
Q

The engine driven fuel pumps are normally supplied with fuel by the?

A

Main ejectors

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9
Q

If the main ejectors fail, the the engine driven fuel pumps will be supplied by the?

A

Electric boost pumps

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10
Q

Fuel imbalance between the main tanks is corrected by?

A

Gravity cross flow

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11
Q

The scavenge ejectors do what?

A

Provide a flow of fuel from the main tanks to the collector tanks

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12
Q

Flapper valves in the main talks prevent what?

A

Reverse flow of fuel from the inboard main talk to the outboard main tank sections

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13
Q

Fuel for the APU is normally supplied by?

A

An electric pump in the right main tank

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14
Q

In the case of a negative G condition, fuel for the APU is supplied by?

A

The left main ejector

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15
Q

The pump switch lights on the fuel control panel control the?

A

Electric boost pumps

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16
Q

The preferred method of refuelling is?

A

Single point pressure refuelling

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17
Q

The maximum pressure for single point refuelling is?

A

50 psi

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18
Q

Never open the overwing fuel caps if the fuel quantity is unknown or if the tank contains more than?

A

4000lbs

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19
Q

During flight, the maximum imbalance between main tanks is?

A

800 lbs

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20
Q

To dump fuel?

A

The dump switchlight must be depressed

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21
Q

The left electric pump is powered by?

A

DC BATT BUS

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22
Q

The right electric pump is powered by?

A

DC BUS 2

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23
Q

Overwing refuelling results in what percentage less fuel uptake?

A

7%

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24
Q

Total Fuel capacity?

A

20,000lbs

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25
Q

Mains capacity?

A

9720lbs

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26
Q

Aux capacity?

A

7168lbs

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27
Q

Tail capacity?

28
Q

FSCU stands for

A

Fuel system computer unit

29
Q

What % does the mains burn down to before the aux and tail begin burn?

A

93% (4500lbs)

30
Q

How many capacitance probes?

A

17

6 per wing, 4 aux, 1 tail

31
Q

AUTO TAIL XFER INHIB means?

A

Rotor burst shroud has released nitrogen (real issue, do not override)

32
Q

AUTO TAIL XFER means?

A

Failure of the FSCU - override if required

33
Q

Talk tank transfer pump/hr?

A

1800lbs (900 without SB)

34
Q

Fuel dump figure per minute?

A

100-120lbs

35
Q

Limitation of fuel dump?

A

Flap up, no lightening

36
Q

Max fuel imbalance?

A

400lbs for taxi, take off and landing, 800lbs inflight

800lbs in flight

37
Q

FUEL XFLOW SOV OPEN EICAS message when?

A

Fuel imbalance less than 100lbs and after a 50second delay

38
Q

Max refuel pressure?

39
Q

Defuel suction?

40
Q

Max structural fuel imbalance?

A

2500lbs

Fuel loading left vs. right tanks

41
Q

Main tank primary fuel display turns amber when?

A

Imbalance or <500lbs

42
Q

Tail tanks primary fuel display turns amber when?

A

Tail/aux heavy

43
Q

Aux tank primary fuel display turns white when?

44
Q

Main fuel primary display turns amber when?

45
Q

Bulk fuel limitation?

A

-37 degrees

46
Q

Engine fuel temp limitation

A

5 degrees - cannot take off below

47
Q

Take off with up to 500lbs in the aux tank is permitted provided there is what in the main tanks?

A

1500lbs min

48
Q

Take off with more than 500lbs in the aux tanks provided?

A

There is at least 1500lbs in the mains - if you want more in the aux you must follow the table

49
Q

Minimum fuel quantity for a go around?

A

500lbs per wing provided you do not exceed >10 degrees nose up

50
Q

Aux tank quantity must be what multiplied by tail tank?

51
Q

How many tanks in the tail?

A

Three (3)
One Tail Cone
Two saddle tanks

52
Q

ROT Fuel Flows?

A

2,500 lb/hr – hour One
2,000 lb/hr – hour two+

53
Q

What could happen if pressure fueling is interrupted?

A

Aux tank may stop filling prior to top off. Could require manual refueling.

54
Q

Which fuel tank directly fees the engines?

A

Collector tanks

55
Q

How can you cross-feed fuel between the mains/wings?

A

GRAVITY XFLOW switch

56
Q

Can you gravity fuel the tail tank?

A

No.
Pressure fueling only

57
Q

Which Fuel tanks can be dumped?

A

Tail tanks only

58
Q

What is the sequence of fuel transfer in flight?

A

MAINS to 93%, then…
AUX to MAINS, then…
TAIL to AUX

59
Q

How is a fuel imbalance corrected?

A

Transfer L or R TO AUX

60
Q

What is the purpose of the 2 electric boost pumps?

A

Backup the two main ejector pumps.

61
Q

What will cause a boost pump to run?

A

Motive flow failure or low pressure

62
Q

Why is “bulk” fuel temp taken from the left wing only?

A

Right wing gets return fuel that has been used to cool APU Gen adapter oil.

63
Q

Fuel from the collector tanks is supplied to each engine-driven high pressure pump by…

A

Main ejector pumps, or electrical boost pumps

64
Q

The AUX Tank system consists of…

A
  • Center
  • Forward
  • Aft tanks
65
Q

The OVERRIDE switch on the FUEL/DEFUEL panel allows individual fueling of …

A

AUX or TAIL tanks

66
Q

Takeoff with up to 500 lbs in the AUX tank is permitted, provided…

A

there is 1500 lbs in each wing tank.

67
Q

Is fuel cross-flow permitted during takeoff? Landing?

A
  • Takeoff – NO
  • Landing – YES

CL-604 (12 decks)

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