Indeed - I used to have a (share in a) PA28-161 with an electric trimmer; it was placarded not to be be switched on below 1000ft IIRC, for just such reasons. I can also recall a Tucano loss in flight that was partially attributed to an electric pitch trim runaway. What I'm less sure of is whether there's anything out there in the way of formal reporting on the topic? I don't think I've ever seen anything at all about the airworthiness implications of lever versus wheel for a mechanical trim system.
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Last edited by Genghis the Engineer; 15th Mar 2018 at 00:51.