My son and I have been rebuilding a 77 J model that we bought couple years back. BTW, the prior owner was a A&P IA.... The prior owner passed away and his kids trashed all his personal belongings AND the log books to this airplane. Well with everything being overhauled and or new we are getting close to done. BUT, the aileron and the rudder have had a trim tab added. We found the aileron trim tab and servo paperwork and is by aero-trim so that STC is handled. However, the rudder has a adjustable by a link not a servo trim tab. Before we remove it has ANYONE seen these before and or have any knowledge of a existing STC?
I will get some pics posted