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STEC 3100 with Avidyne

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Sonnyz View Drop Down
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    Posted: 05 Feb 2019 at 1:00pm
I have both the IFD540 and 440 installed in my panel and I recently upgraded to the new STEC 3100.  When on a RNAV final approach the autopilot flies the plane slightly offset to the left of course with the CDI centered. I have been told by STEC that they know about this and it is specific to Avidyne units.  Has anyone out there heard or experienced this? I am wondering if this is something that will be corrected in the next software release. 
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forkauto View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote forkauto Quote  Post ReplyReply Direct Link To This Post Posted: 05 Feb 2019 at 2:19pm
I read a post about this on the PiperOwner forum. Another owner has the 3100 with an IFD and supposedly STEC is coming out with a software issue to solve the problem



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Kentucky Captain View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kentucky Captain Quote  Post ReplyReply Direct Link To This Post Posted: 11 Feb 2019 at 3:35am
I have had the same problem with my IFD540/STEC-30 combo.   When coupled  to the autopilot it tracks fine until you get inside the IAF.  It will slowly move off center to the right where it will end up at least a half a dot off at a 1 mile final.  This is on an ILS or RNAV approach.  I've talked to the folks at Avidyne and STEC without any resolution in sight.  I've finally given up and am contemplating replacing the STEC with a Tru-Trak.
Spending my kid's inheritance, one upgrade at a time.
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chflyer View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote chflyer Quote  Post ReplyReply Direct Link To This Post Posted: 11 Feb 2019 at 5:29am
You realize that the Tru-Trak only does GPS, not ILS/LOC/VOR?
Vince
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Flybuddy Quote  Post ReplyReply Direct Link To This Post Posted: 11 Feb 2019 at 9:27am
I think that all TruTrak needs to track an ILS/LOC/VOR is 429 input. The Aspen products have 429 but I don't think they are software compatible yet.
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Kentucky Captain View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kentucky Captain Quote  Post ReplyReply Direct Link To This Post Posted: 11 Feb 2019 at 1:01pm
Originally posted by chflyer chflyer wrote:

You realize that the Tru-Trak only does GPS, not ILS/LOC/VOR?


Yes, I'm willing to trade my STEC with it's wandering final and altitude hold only for an autopilot that holds the centerline and does full V-Nav even if only on a GPS approach.

I went back and looked at my past practices.  My airport only has GPS approaches.  Most every airport that I fly to has a GPS approach.  If I need to fly an ILS or VOR approach, I can still hand fly it.  The Tru-Trak also has a bunch of other features that my STEC does not.

I did get to talk to Andrew Barker, the President of TruTrak at the last AOPA regional Fly-in.  From what I remember, the limitation on non-GPS approaches was one imposed by the company in order to facilitate certification, not the lack of compatibility.  I would bet that in the near future that this issue will be handled.

All I need now is for my big house to sell so that I can have only have the one that we built to down-size into and free up some funds.  Anyone looking for a 6000sq/ft house with an elevator, theater, and a huge chef's kitchen in KY?
Spending my kid's inheritance, one upgrade at a time.
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rolfe_tessem View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rolfe_tessem Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb 2019 at 3:37pm
My STEC 55x is rock solid on all types of approaches, unless of course the crosswind gets truly excessive.

Rolfe

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