Does anybody know the number of main and or Aux fuel tanks on this A/C? or is it just one large Tank that holds the total fuel onboard?
I would hazard a guess that a fuel leak in one of the fuel tanks would account for the "Missing" Fuel altough if that were true surely ther would be a noticable Imbalance which would have to be Trmmed out. This application of Trim would go someway towards confirming the Fuel Leak Theory.
Also they no the total capacity of the Tanks. They know theUplift and Presumably the Burn so they should be able to work out the Total onboard which should match the Fuel Indicated. If not more than Likely you have a Leak as it is exterely unlikely to have bad indication on a New A/C