As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON PRE-FLIGHT, A BLUING (HEATED) AREA WAS FOUND ON THE T/R HUB AT THE BUSHING END, ONE SIDE. A TEAR-DOWN REVEALED THE TRUNNION SLEEVE AND BUSHING HAD SEVERE GALLING AND HEAT DAMAGE. BOTH TRUNNION AND BUSHINGS WERE REPLACED. SUBMITTER SUGGESTED RE-DESIGN WITH DIFFERENT MATERIALS AND TOLERANCES MIGHT HELP EXTEND THE LIFE OF THESE PARTS. OPER CONTROL NR QKZA029W.