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Guest trevor

777 VNAV problem

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Hi StevenPlease stay with me on this one. I did a totally new installation and hey presto! the panel loaded. I then tried out the tutorial flight and now I am sitting with another problem.Before takeoff, I armed the LNAV and VNAV modes as per tutorial. The LNAV and VNAV appeared on the PFD as armed (white).After takeoff the LNAV engaged (green) and soon afterwards the VNAV engaged. I then switched the AP on. The nose began to drop and I thought this was to attain the correct CLB spd. However, the VS went from +3000 to eventually -3000. I had to end the flight. The LNAV appears to be working but the AP is not engaging the VNAV mode(although according to the PFD, VNAV is engaged).Even without selecting LNAV and VNAV, when switching on the AP no vertical mode becomes engaged. The FD is on.Have I missed something ? Why won't the VNAV mode engage when AP is on ?Please helpThanksTrevor

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Trevor,I see you did a complete re-install. Did you also follow Steven's advice about loading from the FS9 default flight as this AP behaviour is often a characteristic of not having the original FS9 default flight set.John Rooum

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It was a FSUIPC problem.Now I am enjoying the 777. Flights have been smooth as a baby's ....... smooth!ThanksTrevor

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