Fuel 747-400 Flashcards Preview

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Flashcards in Fuel 747-400 Deck (11)
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1
Q

What is the function of the fuel flow limiting valve?

A

Prevents unwanted fuel transfer by unequal pump pressure.

Allows intended crossfeed.

2
Q

Which pumps can act as jettison pumps?

A

All the overide and transfer/jettison pumps

3
Q

Where and to does the main tank transfer valves allow fuel transfer?

A

From the main tank 4, and 3 to tank 1 and 2.

4
Q

How is the fuel usage after engine start?

A

All engines by center wing tank pumps

5
Q

How is CWT fuel scavanged, and when does it happen?

A

Scavanged by 4 jet pumps.

When main tank 2 and 3 about 27,200 fuel is pumped from the center wing tanks to main tanks 2 and 3.

6
Q

When do the reserve tank transfer valves open automatically.

A

When fuel in main tanks 2 and 3 is approximately 18t.

7
Q

When is the FUEL IMBAL 2-3 light illuminated?

A

When imbalance between tanks 2, and 3 is 2,720kg or more.

8
Q

When is the FUEL IMBAL 1, 4 light illuminated?

A

When imbalance between tanks 1 and 4 is 1,360Kg or more. AOM procedure should be used.

9
Q

What can be done to increase fuel temperature?

A

change to a flight level with a warmer temperature and/or Increase mach number, and or

10
Q

TANK/ENG light on. What is the correct procedure?

A

All OVRD pumps off, X-FEED valves 1, and 4 closed.

11
Q

Can fuel be jettisoned out of the crossfeed manifold?

A

No.