The minimum unusable fuel in the fuel tank in B777

[SherwinWong]

As the title, does anybody can tell me what's the minimum unusable fuel in the fuel tank? I cant find in the Flight Manual.

Thanks guys.

[LME (GOD)]

There's no such thing as minimum unusable fuel....after emptying the tanks with the boost pumps/suction, you would expect to sump up 50 gallons
Capacities are 64,640 lb (29 320 kg) for the wings and 176,440 lb (79 720 kg) for the centre tank.

[singleseater]

Zero.
Think you will find in the FCOM it states that the gauges will read 0 at min useable. If you are that tight, go till it goes quiet!!!

Watch out for Gravity, It eventually has control.

[Old Smokey]

singleseater has it right. For the B777, when the fuel quantity is down to unuseable, the gauges read zero. (NOT so for many other aircraft).

Regards,

Old Smokey