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ILS Procedure Fails to Arm Nav Source

Printed From: Avidyne
Category: Entegra Release 9
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URL: http://forums.avidyne.com/forum_posts.asp?TID=228
Printed Date: 25 Dec 2024 at 2:54pm
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Topic: ILS Procedure Fails to Arm Nav Source
Posted By: Guests
Subject: ILS Procedure Fails to Arm Nav Source
Date Posted: 31 Aug 2012 at 8:57am
While this may be an old issue, I can't find reference to it.  

We are finding that the FMS will not always switch Nav Source from FMS to Nav on an ILS.  I thought I had read that it would only automatically switch on Vectors to Final, but even then it is inconsistent.  

Am I doing something wrong, or have a misunderstanding?

Thanks

Craig



Replies:
Posted By: AviJake
Date Posted: 03 Sep 2012 at 7:13pm
Yes, I believe you are doing something procedurally wrong.  Let me dig up a previous explanation on 4 Sep and update this post.

-------------
Steve Jacobson
sjacobson@avidyne.com


Posted By: AviJake
Date Posted: 04 Sep 2012 at 1:49pm
Craig,

I may withdrawal my procedural indictment claim.   When I went back and looked at all previous reports of this behavior in the past, it seems to always be due to the station identifier Morse code not being properly decoded.  The logic behind it being that if we can't decode the station and compare it to the on-board database, then we can't be sure you're on the proper approach and don't autoswitch the nav source on you.

I suspect your system expertise makes it very likely that you're doing all the correct procedural steps.  Do you by chance recall if you saw the station identifier get displayed in English?  That English display is the indication that the identifier decoding has successfully happened.


-------------
Steve Jacobson
sjacobson@avidyne.com


Posted By: Guests
Date Posted: 01 Oct 2012 at 1:07pm
Jake,

I will check that out on next flight.

Thanks for fixing my access.



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