llondel,
The warning on the A330/A340 classics that came out after the Air Transat incident, compares initial FOB with actual FOB plus FU; if that equation does not add up by 3.5t (if my memory serves me right here), then youŽll get a warning. It is therefore only useful if you have an external leak, and wouldnŽt have helped Happy
Lloyd.
Btw: The list of inhibitions for this warning is incredibly loooong. So, donŽt trust the machine too much. Better check yourself every once in a while.
Cheers,
J.V.