Hi,I am new here and i have a problem with your wonderful PMDG 744. My VNAV does not work. I put in FL230 in to the ALT box on the MCP and the plane totally ignores this and climbs and climbs until the plane stalls and crashes. Other than this your plane is wonderfulHope someone can help.Alex Crompton

Alex,Have you completly entered all necessary values into the FMC? WHat is your technique activating VNAV. What modes does the FMA (flight mode annunciator) at the top of your PFD (primary flight display) tell you the AFDS (automatic flight director system) is in?Maybe a screenshot of your main panel can help us sort you out?Hope it helps,