Require experts how do u get the fmc to change fuel calc I made a mistake with the loading and fuel required tried always to get the reloading plan renewed so as to load correct fuel,I hope i made myself clear can some on help out there.........regards robin

Not sure if I understand your question, but AFAIK fuel can not be changed in the PMDG 747-400 with the "Aircraft -> Fuel and Payload" menu in FS9. You must go to "PMDG -> Settings -> Fuel" and load the fuel you need. The FMC will then show the right amount of fuel automatically.- Neeraj.

You are correct Neeraj. You can only reset the fuel via the PMDG Options menu, after which the FMC will pick up the fuel level.