Hi,
I'm very new here, but need some advise from more experienced pilots
I have problem with my C172S KAP-140. Today I had two flights. On a first flight there was electrical trim malfunction. I have restarted avionics and trim worked fine. Autopilot also worked fine except an issue with NAV mode.
I few hours I've made one more flight and on this flight autopilot did not work properly. When I set heading on DI, airplane starts deviating by 10-15 degrees to the left of desired heading. The same happens in NAV mode with desired track. Crosswind exists, but it is not a reason for sure. When it is heading select mode used, it maintain strictly selected heading.
I've done some tests with right and left turns. Left turns are steep, right turns are very shallow. So, it seems, that autopilot tends to make left turn (thinking it flies straight in).
All self test are okay. Probably there's some way to calibrate device? Here in Latvia there's no maintenance organization, who can repair bendix avionics
I would appreciate any advice on this issue.
Best Regards,
Sergey