Release 9 Insiders - Anyone can post - ILS Procedure Fails to Arm Nav Source

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ILS Procedure Fails to Arm Nav Source

Printed From: Avidyne
Category: Entegra Release 9
Forum Name: Release 9 Insiders - Anyone can post
Forum Description: Release 9 Insider Members
URL: https://avidynelive.com/forum_posts.asp?TID=228
Printed Date: 26 Mar 2026 at 9:41am
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com

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 3:57am

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 2:13pm

Yes, I believe you are doing something procedurally wrong. Let me dig up a previous explanation on 4 Sep and update this post.

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Steve Jacobson
sjacobson@avidyne.com

Posted By: AviJake
Date Posted: 04 Sep 2012 at 8:49am

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.

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Steve Jacobson
sjacobson@avidyne.com

Posted By: Guests
Date Posted: 01 Oct 2012 at 8:07am

Jake,

I will check that out on next flight.

Thanks for fixing my access.