Pitch Trim Runaway with Autopilot On

[scotfleiger]

I have been experiencing a pitch trim runaway when the autopilot is selected on. The trim moves to the pitch up limit when the AP button is pressed which stop when the button is pressed again to cancel AP. The DataRefs sim/cockpit/warnings/annunciators/autopliot/autopilot_trim_up and  sim/cockpit2/annunciators/autopilot_trim_up go to 1 when this happens.

This occurs on the ground with just Battery and Avionics selected on and with engines running. In flight the autopilot operates normally with no pitch trim input. All plugins (ie. xsaitekpanels) that could control the pitch trim are off. If I operate the pitch trim axis using my Saitek Trim Wheel the pitch trim re-centres while I move the wheel before the runaway continues. 

Is this normal for the Islander or a fault? It made taking off with full up trim very interesting.

[Ch.Cole]

Why would you activate the AP on the ground? Obviously your pitch won't change with the trim, so the AP tries to trim more.

[scotfleiger]

I would not normally activate AP on ground (obviously) but I was testing the buttons and modes. Why is the AP trying to change the pitch trim? The speed was low or zero. 

[Ch.Cole]

It was either trying to increase your pitch in pitch mode, or your v/s in v/s mode. Since both didn't increase, it continued to trim up. Basically, it's expected behaviour.

[scotfleiger]

Thank you for the explanation. I thought there was something wrong with my xsaitekpanels configuration.