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Guest SwissMD11

747 Fuel Issue

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Hey Guys,I have a problem with the fuel on the PMDG 747. For Example : I had started my flight from LHR-MRU with 32.5 (according to the FMC) of fuel remaining at MRU. That time the optimum altitude shown by the FMC was FL298 so I set my cruising altitude to FL290 and using ICAO rules, I step climbed to FL330 when the FMC told me I was ready. The EFOB at MRU increased a little. And some time after that, my EFOB at MRU started decreasing very slowly. I thought that it would be no problem so I left the PC and when I came back , it showed that the EFOB at MRU would be 9.9 ?? SO, I tried some things like descending to the optimum altitude and reducing the speed to Mach .80. They helped for a while but the EFOB started decreasing again slowly. I don't know why this happening ?? I have the latest SP installed.BTW, my Cost Index was 50.

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