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Guest Ken_Verga

737 Vnav disconnects

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Guest Ken_Verga

When I'm flying I arm VNAV the FMC is programed but when I reach the first altitube it just disconnects and when I try to connect it it wont light up.Any idea why?Kenneth

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Guest airbus2

Hey.More information would be helpfull, are there any error messages in the FMC? Also what altitude do you have in the MCP? Make sure it is your cruise altitude or higher then your first altitude constraint or VNAV will disconect and alt hold takeover.Hope this helps,David.

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Guest Ken_Verga

>Hey.>>More information would be helpfull, are there any error>messages in the FMC? >>Also what altitude do you have in the MCP? Make sure it is>your cruise altitude or higher then your first altitude>constraint or VNAV will disconect and alt hold takeover.>>Hope this helps,>>David.I think it is that because when I set FL13 from FL12 I could activate it thanks!Kenneth

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