B767 Fuel Totalizer & Calculated

[alampl]

I think this topic was discussed before, but i was not able to find the Thread again.

During long flights on 767´s we often have a big difference between Calculated and Totalizer fuel on PROG 2. Sometimes the fuel "comes back" during approach, but sometimes we end up with a difference of more than 2 tonnes. Does someone know if that has something to do with using VNAV mode, or has an other idea?

Thx

[oceancrosser]

I do not really know why this happens on most of the 767s I have flown, this is somewhat different from one ship to the other.
Incidentally this is something you rarely see on the 757, but of course that one only carries about half the fuel load of the 767.