Tons
Is that Short Tons or Long Tons?
I understand that a 777-200ER has a Max TOW of 656,000 LBS and a Max Landing Weight of 470,000 LBS (I am sorry, but I am old enough to think in pounds). I think I am right in thinking it took off with 54.1 Tons of fuel, or 121,400Lbs out of a possible max fuel of 303,292 LBS (assuming 6.71LB/USG)? It is logical that this figure comes from the pre-flight weight and balance calculations. Anyway, that is not nearly max fuel and if it really did climb then descend, then fly at low altitude for a while before climbing again, it would have gone through quite a bit of its 121,400LBS of fuel to get to the waypoint where it was, apparently last seen.
I do wonder what the weight of the aircraft might have been at 01:19 with regards to Maximum Landing Weight...