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UTC mismatch IFD540 |
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larco 
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Joined: 21 Feb 2024 Location: KDVT Status: Offline Points: 4 |
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 Topic: UTC mismatch IFD540Posted: 06 Aug 2025 at 4:28pm |
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IFD540 is showing a flag UTC mismatch when turned on and shows an incorrect time the unit. after a reboot the flag goes away and the time is correct. was doing this after sitting for a couple of weeks, now every startup requires a reboot to get the proper time match. Is this a common problem?
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nrproces
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Joined: 19 Sep 2016 Location: Marion, MT Status: Offline Points: 144 |
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Posted: 07 Aug 2025 at 9:49am |
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This has been an issue for a long time. I have found it depends on the length of time, between sorties. If it is a couple of days, it doesn't happen, but more than that all bets are off...
Edited by nrproces - 07 Aug 2025 at 9:50am |
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Sauce
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larco
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Joined: 21 Feb 2024 Location: KDVT Status: Offline Points: 4 |
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Posted: 07 Aug 2025 at 11:03am |
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Thanks for the reply. A real disappointment for sure having to reboot during taxi on almost every flight now. I emailed AVI a while back and didn't get a response. I guess the next move is a call to support>
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HenryM
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Joined: 13 Oct 2017 Location: Texas Status: Offline Points: 506 |
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Posted: 07 Aug 2025 at 1:00pm |
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I seem to remember an issue like this was corrected in one of the software updates. I'm not sure if it was the most recent update now a year or ore ago, or the one before that. What is the firmware level in your IFD540?
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AviSteve
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Joined: 12 Feb 2018 Location: Melbourne, FL Status: Offline Points: 2345 |
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Posted: 08 Aug 2025 at 4:32pm |
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There is an IFD hardware mod to address this issue. Contact tech support for more details.
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Steve Lindsley
Avidyne Engineering |
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PA23
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Joined: 12 Oct 2019 Location: MMU Status: Offline Points: 353 |
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Posted: 12 Aug 2025 at 9:48pm |
I had the hardware mod done on my unit and it drastically reduced the occurrence of the UTC mismatch error but didn't eliminate it.
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larco
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Joined: 21 Feb 2024 Location: KDVT Status: Offline Points: 4 |
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Posted: 2 hours 32 minutes ago at 11:55am |
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AVISteve,
I opened a ticket PS00150966 and the reply was go to a dealer and Initiate the return of the unit for repair.
I was told by the selling dealer, Avionics source, that as an Experimental I would not need a dealer. Obviously that's not true? He has since left the business. A lot of dealers will not work on EXP planes BTW. As an experimental owner with lots of experience in the avionics world and capable of removing the navigator do I need to go through a dealer? Have left a message with a dealer near by. He has not returned my call yet and I would like to get this set up. Is this repair subject to a flat rate charge and a dealer charge for sending it? Purchased a new unit in 2021, Had a problem, Bruce in support after looking at the files I sent said yes it has a known issue, don't remember the issue now, but instead of repairing my new unit He sent me exchange that had been heavily used. after a few software patches and a new plug for the usb port it seemed ok except for the occasional flag UTC mismatch. This older exchange unit is the current problem child. Please Advise as I just want a reliable Navigator trustworthy for some light IFR work Thanks, Larry Schneider Edited by larco - 2 hours 27 minutes ago at 12:00pm |
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AviSteve wrote: