Fuel Flashcards

1
Q

What is the total useable fuel capacity?

A

2574kg

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2
Q

What powers the auxiliary fuel pumps?

A

Venturi-type in which high pressure jet of motivating fuel is injected into the venturi throat to induce the pumping action.

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3
Q

What are the consequences of taking off with a FUELLING ON caution light?

A

Fuel transfer is not possible

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4
Q

What does TANK FUEL LOW caution indicate?

A

When the collector bay has less than 59kg of fuel. Could be caused by flapper valves being blocked or fuel leak.

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5
Q

What is the maximum fuel tank imbalance?

A

272kg

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6
Q

From what part of the fuel tank is fuel fed to the engines?

A

Collector Bay

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7
Q

What does the ENG. FUEL PRESS caution light indicate? What could cause this? What are the crew actions?

A

Less than 5.5psi of fuel being fed to the inlet side of the engine driven fuel pump. Could be caused by failure of the scavenge/venturi pump or a leak. Turn the Aux fuel pump on, check for leaks, shut down if leak’s confirmed.

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8
Q

What does the FUEL FILTER BYPASS caution indicate? What are the crew actions?

A

Impending bypass of the engine driven fuel pump filter. No crew action required. Monitor F/F, ITT and NH.

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9
Q

What would be the indication of an auxiliary pump failure?

A

Lack of green light

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10
Q

How many magna-sticks are in each tank?

A

2

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11
Q

What is the source of the ‘motive’ fuel flow to operate the boost and scavenge ejector pumps?

A

Excess engine fuel feed that is bypassed by the MFC and returned to the tank when above 40% NH.

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12
Q

When are the auxiliary pumps used?

A

Take-off and Landing, When fuel pressure is low (manual); Automatically used when transferring fuel (donor tank), pressure defuelling

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13
Q

How is engine fuel heated?

A

Hot engine lubricating oil passed through heat exchanger.

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14
Q

Which auxiliary pump is automatically turned on when transferring fuel?

A

Donor Tank’s Pump

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15
Q

Purpose of flapper valves on collector bay

A

Allows fuel in but not out

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16
Q

Sections of Fuel Tank

A

Collector Bay, Main Tank, Surge Bay

17
Q

What drives the main fuel pump?

A

Accessories gearbox of the engine

18
Q

Where is the auxiliary pump located?

A

In the collector bay of each tank

19
Q

Prior to entering the engine driven fuel pump, the fuel is:

A

Filtered and Heated

20
Q

How many scavenge pumps are in the tank?

A

3