PPRuNe Forums - B777 APU fuel imbalance

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applecrumble

15th July 2024 10:57

B777 APU fuel imbalance

Hi guys,

we do some long turnarounds on the 777 where it is left on APU.
Is there a way to stop a fuel imbalance building? I can’t see a way but was just wondering?

Cough

15th July 2024 11:11

Refuel it late on the turnaround - No imbalance for departure?

dixi188

15th July 2024 13:45

Load a bit more fuel in the tank that supplies the APU perhaps?
I don't know the B777 fuel system, but can you transfer centre tank fuel to the wing tanks?

skkm	15th July 2024 14:22

The APU gets fuel from the left engine feed manifold. If you pressurise the centre tank pumps, or the right main tank pumps with a crossfeed open, you can use fuel from a different tank. Alternately, your ground engineer or refueller can transfer fuel using the defuel system to rebalance the main tanks later.

TURIN

15th July 2024 15:21

Quote:

Originally Posted by applecrumble (Post 11696734)

Hi guys,

we do some long turnarounds on the 777 where it is left on APU.
Is there a way to stop a fuel imbalance building? I can’t see a way but was just wondering?

Buy a GPU? 😁

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