Dead Reckoning |
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Flybuddy
Senior Member Joined: 25 Jan 2019 Location: Fort Myers Status: Offline Points: 145 |
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Posted: 08 Aug 2020 at 8:21pm |
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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
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oskrypuch
Senior Member Joined: 09 Nov 2012 Location: CYFD Status: Offline Points: 3061 |
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Nasty. I have not seen something like that. * Orest
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Catani
Senior Member Joined: 21 Jan 2016 Status: Offline Points: 362 |
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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
Senior Member Joined: 25 Jan 2019 Location: Fort Myers Status: Offline Points: 145 |
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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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PA20Pacer
Senior Member Joined: 07 Mar 2012 Location: Illinois (LL22) Status: Offline Points: 161 |
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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. Edited by PA20Pacer - 09 Aug 2020 at 8:57am |
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Bob Siegfried, II
Brookeridge Airpark (LL22) Downers Grove, IL |
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