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Dynon HDX - AP Panel Off-Line

Piper J3

Well Known Member
I’m helping a friend with RV-12, dual Dynon HDX, with remote Knob and AP Panel.

Everything was good for 200TT and the last flight had HDX warning that AP Panel Off-Line.. and, sure enough, it was. The stabilator trim is not functioning either with the manually operated trim switch. We are told that stab trim goes through the AP Panel, so if the AP Panel takes a dump, you lose stabilator trim. Makes for some fun flying…

I would think the trim would fail "safe" and keep functioning, but apparently not.

The reason for posting this thread is to give a head’s up on the potential for trim being inoperable at inopportune moments.

Anyone else had this problem?
 
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