Flap bearing mount assembly was skewed slightly. Previously, we elongated the hole in the tab in the wing root so the inboard flap bearing would line up with the outboard one. I made a doubler plate, primed it, and Aidan and I riveted it on to the existing tab. Then we inserted the bolts with blue Loctite. We greased the bearings and the torque tube now rotates smoothly. Mark G commented that the .032 aluminum doubler might not be thick enough (original tab is about .040 aluminum. He will check with the designer, Engineer Bob Barrows and get back to me. It seems very strong to me, but if Barrows says to replace it, we will drill out the rivets and make another one, or replace the mounting tab altogether.
Apr 4, 2020. Mark Goldberg from Avipro checked with Designer Bob Barrows and Bob has approved this fix.