HiI have flew many hours with 737-800 with no problems.Last night I loaded the model update.Today in the 700 & 800 the FMC is showing the fuel as 10.1 when I have 20,000 of fuel, if I load 18,400 lbs the FMC shows 8.4, seem to be loosing 10,000lb of fuel. The vref speeds will not calculate when you press the relevant LSK buttons, I guess if I can fix the fuel the vspd may sort itself out. Any help would be appreciated. Oh I have tried a re-install using repair mode - no change.ThanksDavid CampbellSorry tried more fuel tests, the fuel is actually just under half in the FMC as to what is actually on boardExamplesBoarded FMC43754 19.916450 7.57796 3.52619 1.2

HiI have flew many hours with 737-800 with no problems.Last night I loaded the model update.Today in the 700 & 800 the FMC is showing the fuel as 10.1 when I have 20,000 of fuel, if I load 18,400 lbs the FMC shows 8.4, seem to be loosing 10,000lb of fuel. The vref speeds will not calculate when you press the relevant LSK buttons, I guess if I can fix the fuel the vspd may sort itself out. Any help would be appreciated. Oh I have tried a re-install using repair mode - no change.ThanksDavid CampbellSorry tried more fuel tests, the fuel is actually just under half in the FMC as to what is actually on boardExamplesBoarded FMC43754 19.916450 7.57796 3.52619 1.2

Hi,You need to set your weight conventions from the PMDG menu in flight sim.It looks as though it is set for Kgs not Llbs.Norman Bowman

NormanThanks....sortedDavid Campbell