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greg100o

747 FMC managed descents

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When I program a route with standard star from PMDG database, it seems that all too often the FMC will miss the target altitudes on the star by quite alot, saying unable target altitude and arriving so high that I have to circle to lose a couple thousand feet to get lined up for the ILS. The target speeds seem appropriate for the star.It appears the FMC is calculating the TOD way too late in flight path to make it down on time.Is there anything I can do to avoid this issue?Greg

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Are you using any weather? If so you need to enter that into the FMC or the decent calculations will be off...

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