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VNAV - Multiple restrictions

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Are you able to enter multiple waypoint altitude restrictions for VNAV to follow?  I am asking because I have just completed the detailed tutorial and was able to get the first descent to 19000 to work with VNAV but when I entered the second crossing at SHAFF - 7000 ft, the VNAV did not seem to follow it.   The aircraft leveled off at 19000 and stayed there even though I reset the ALT to 7000 and pressed VNAV when the second TOD was reached.  I ended up just manually descending.

Mark   CYYZ      

 

You will need to go back to the vnav page enter the new restriction for the schaff waypoint just like you did for the previous one. <br /><br />A tod symbol will appear about 15 miles ahead of your position then when the profile appears on off hit vnav.

Sean Green

  • Author

Thanks, I was re-reading that section of the tutorial yesterday and realized I missed a step of entering the restriction in the FPL page first before entering it on the VNAV page.

Mark   CYYZ      

 

  • Author

You will need to go back to the vnav page enter the new restriction for the schaff waypoint just like you did for the previous one. <br /><br />A tod symbol will appear about 15 miles ahead of your position then when the profile appears on off hit vnav.

 

So you can only enter the second restriction after passing the first?  I tried again and when I entered the second restriction at 7000ft the VNAV modified the descent profile to meet the second restriction while ignoring the first.

Mark   CYYZ      

 

Quote

So you can only enter the second restriction after passing the first?

Correct, or more correctly you can only activate one descent leg at a time. VNAV is quite rudimentary in a Dash 8.

Cheers, Andy.

  • Author

thanks for the clarification.

Mark   CYYZ      

 

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