I just upgraded my panel to dual Skyview HDX displays (7" & 10") with the knob panel and the Autopilot control Panel. On my first flight with this new setup I did the ground checks of the trim and all seemed to work ok, but when I flew my first flight, on liftoff I encountered full nose up trim and trim not responding to the electric trim inputs. As you might guess I had my hands full horsing the beast around the traffic pattern to get it on the ground.
Back to the avionics shop I went in and described the problem. After checking everything out and ground checking the trim operation I attempted another takeoff and encountered the same problem- full up trim and no response from trim switch in either direction. Once back on the ground I taxied back to the avionics shop-AGAIN, shut down where we once again checked the trim, where it performed flawlessly.
We then decided to check the operation of the trim with the engine running, with one person standing outside to observe the movement while I activated the trim. The plan was for me to activate the trim in both directions, while the outside observer would give me a thumbs up or down to indicate the direction of movement. Initially the trim worked in one direction (up), but would not respond in the opposite direction. Eventually it quit responding altogether.
I returned the AP Controll panel to Dynon for repair, and today checked its operation before and after start before flight, and low and behold, the Trim worked great with the engine shut down, but once again I encountered the same problem as before with the engine running. I found that the way to get around this is to bypass the AP Panel with the trim, but then I do not have the Autotrim function or trim position indication.
My question is whether anyone else has experienced a similar problem, and if so how did they remedy the problem. Could this be a incorrect setting in skyview or do I have a defective AP Panel.
Frustrated in Jacksonville
Back to the avionics shop I went in and described the problem. After checking everything out and ground checking the trim operation I attempted another takeoff and encountered the same problem- full up trim and no response from trim switch in either direction. Once back on the ground I taxied back to the avionics shop-AGAIN, shut down where we once again checked the trim, where it performed flawlessly.
We then decided to check the operation of the trim with the engine running, with one person standing outside to observe the movement while I activated the trim. The plan was for me to activate the trim in both directions, while the outside observer would give me a thumbs up or down to indicate the direction of movement. Initially the trim worked in one direction (up), but would not respond in the opposite direction. Eventually it quit responding altogether.
I returned the AP Controll panel to Dynon for repair, and today checked its operation before and after start before flight, and low and behold, the Trim worked great with the engine shut down, but once again I encountered the same problem as before with the engine running. I found that the way to get around this is to bypass the AP Panel with the trim, but then I do not have the Autotrim function or trim position indication.
My question is whether anyone else has experienced a similar problem, and if so how did they remedy the problem. Could this be a incorrect setting in skyview or do I have a defective AP Panel.
Frustrated in Jacksonville