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Overspeed Warning

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daveS View Drop Down
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    Posted: 17 Apr 2020 at 9:50am
It was flap overspeed so I’ll check out the switch.
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dave
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AviSteve View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AviSteve Quote  Post ReplyReply Direct Link To This Post Posted: 17 Apr 2020 at 9:43am
It depends upon whether you heard "Caution Flap Overspeed" or "Caution Overspeed".

If flap overspeed, it's most likely a loose wire in the flap switch circuit.  You may be able to diagnose it by jiggling the switch in flight.

"Caution overspeed", is based strictly on the data that we get via serial bus from the Aspen.  Verify that the Aspen software is up to date for both the MAP and the IOP.  Might be worth asking Aspen to see if they have had any other reports of this behavior.  We did spend some time earlier this year tracking down a problem with integration of the Aspen Max units and the DFC90, which resulted in a new Aspen IOP software version.  The problem we tracked down would cause a disconnect, not an overspeed, but it may be related.

Steve Lindsley
Avidyne Engineering
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Post Options Post Options   Thanks (0) Thanks(0)   Quote daveS Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2020 at 7:22pm
Just completed my 3rd flight with my newly installed DFC90 in my SR22 G1 Aspen 1000.  It’s working well but on my last flight I got an overspeed warning while cruising with an IAS of 150kts and the flaps were up.  3 voice warnings and the she went quiet.  It happened once more later in the flight at 140 KIAS and zero flaps.  Thoughts?
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