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Q 2 > Fuel > Flashcards

Fuel Flashcards

1
Q

Total usable fuel?

A

2574kg (1287 per side)

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2
Q

What powers the Aux pumps?

A

115VAC

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3
Q

What is the consequence of taking off the the FUELLING ON caution?

A

Fuel transfer not possible

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4
Q

TANK FUEL LOW

A

less than 59kg in collector bay.

Could be caused by a blocked or failed pump, Stuck flapper valve or a fuel leak. QRH

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5
Q

Max fuel imbalance?

A

272kg

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6
Q

From where is the Fuel drawn into the engine?

A

The collector bay

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7
Q

ENG FUEL PRESS

A

Less than 5.5PSI in the low pressure feed line to the HP EDP. Could be a motive pump failure, or a fuel leak. QRH

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8
Q

FUEL FLTR BYPASS

A

More than a 1PSI difference either side of the HP EDP. (Impending bypass)
Bypass occurs at 3PSI.
Turn on Aux pump/QRH

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9
Q

How could you tell if the aux pump has failed?

A

No green light when selected on

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10
Q

How many magna sticks are there in each tank?

A

2

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11
Q

What is the source of motive fuel for Scavence pumps and the boost ejector pump?

A

high pressure return fuel from the EDP

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12
Q

When are the Aux pumps used?

A

T/O, LDG, Fuel XFer, QRH

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13
Q

How is fuel heated?

A

Passes through a oil/fuel heat exchanger before the EDP.

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14
Q

Which Aux pump is automatically turned on when transferring fuel?

A

Donor tanks pump

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15
Q

where is fuel temp measured?

A

after LP filter and heater

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16
Q

how many probes are there to measure fuel quantity?

A

6 in each tank (1/6 in the collector bay)

17
Q

What tank is the tank fuel temp taken from?

A

LH

18
Q

Why have 3 scavenge pumps plus and aux pump but only one ejector pump?

A

Extra flow into collector bay creates mixing in the tank which prevents ice forming

19
Q

What is the pressure in the LP fuel line normally?

A

~20PSI

20
Q

What powers the Fuel shutoff T handle?

A

Battery bus

21
Q

What is the Surge tank used for?

A

Tank venting and overflow protection

22
Q

Can we take off with a dump valve stuck open?

A

No

23
Q

What is the consequence of a dump valve being stuck open?

A

No fuel xfer

24
Q

What is the pressure after the HP EDP?

A

980PSI

25
Q

Will the Aux pumps operate if engines are off and plugged in to a GPU?

A

No (115VAC bus)

26
Q

How do we calculate manual fuel use if the fuel sheet is outside limits (meaning a dip would be required)

A

11kg/min +30kg taxi fuel

27
Q

What is the max diff between arr and land gauge fuel numbers (also dep and t/o gauge if not refuelling)

A

100kg

Q 2 (20 decks)

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