Dead Reckoning
Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: http://forums.avidyne.com/forum_posts.asp?TID=2046
Printed Date: 05 Jul 2024 at 7:54am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: Dead Reckoning
Posted By: Flybuddy
Subject: Dead Reckoning
Date Posted: 08 Aug 2020 at 8:21pm
| While talking to Atlanta approach and skirting the edge of the class B, my 440 lost signal and showed a “dead reckoning” message For 20 minutes eventually coming back on by itself. I had been in the air nearly 4 hours at that point. The GPS in the upper right showed a good signal and the several other GPS devices in the aircraft all continued to work. The autopilot is driven by the IFD and it reverted to a wing leveler at that point. Has this happened to anyone else and should I have rebooted it..thx |
Replies:
Posted By: oskrypuch
Date Posted: 08 Aug 2020 at 8:47pm
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Nasty. I have not seen something like that. * Orest
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Posted By: Catani
Date Posted: 08 Aug 2020 at 9:07pm
Once a couple of years ago my IFD got too hot (in the yellow) and I shut it down in flight. After a pause to let it cool off, I turned it back on with no problems on the remainder of that flight (it recaptured the satellites and thereafter behaved normally), and none since. So rebooting was an option you could have done. Can't help with the "dead reckoning" part of your question.
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Flybuddy wrote:Posted By: Flybuddy
Date Posted: 09 Aug 2020 at 8:09am
Thx, thought shut down might have helped as possible it was heat related. I already had final approach and ctaf freqs in number 2 radio and didn’t really want to mess with it while hand flying very close along edge of class B.
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Posted By: PA20Pacer
Date Posted: 09 Aug 2020 at 8:56am
This happened to my IFD 540 last Wednesday, after I had been in the air for about 15 minutes. I rebooted it, and it did come back up, but it was quite disconcerting. I sent a message to Avidyne tech support, and they suggested that I talk to my dealer. I spoke with the dealer, and if it happens in the future I will go in and they will bench check the unit and check the antenna. ------------- Bob Siegfried, II Brookeridge Airpark (LL22) Downers Grove, IL |