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Vnav


jason74
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Hi Im having problems with vnav.  If I start my flight in Turn around mode once I  take off on my flight vnav will not engage. If I start my flight with engines running vnav works. I do arm the auto throttle and FD and once the power gets to about 40% I press the toga switch. is there a switch on the overhead panel im missing?

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Most likely due to not having a valid E/D point, - i.e. having a route discontinuity. Or you don´t have the PERF page filled out. Or the MCP ALT is not set right. Do you get a message on the CDU when you try to engage VNAV?

I suggest you work your way through the tutorials, I am sure you will find the step you are missing there.

Jan

 

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when i look at my flight plan there is no route discontinuity in it. it shows the TC and TD. I just tried another flight and vnav works. sometimes it works others it does not. I always check my flight plan is entered and complete. I have been flying the PMDG NGX for years so know how to enter the flight plan. I do understand the IXEG 737 vnav is a little  differant to the NGX

Edited by jason74
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1 hour ago, jason74 said:

when i look at my flight plan there is no route discontinuity in it. it shows the TC and TD. I just tried another flight and vnav works. sometimes it works others it does not. I always check my flight plan is entered and complete. I have been flying the PMDG NGX for years so know how to enter the flight plan. I do understand the IXEG 737 vnav is a little  differant to the NGX

Hmm, ok - very odd. Do you do consecutive flights - i.e. land, park the plane and then take off again?

Jan

 

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