As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE COMPLYING WITH SB 1105 (RUDDER TORQUE TUBE INSPECTION), RUST WAS FOUND ON THE INTERIOR AND EXTERIOR OF THAT PORTION OF THE TUBE LOCATED INSIDE THE RUDDER. THIS MAY HAVE BEEN PREVENTED BY BETTER VENTILATION OF THE RUDDER IN THAT AREA. (DRAIN HOLES), AND BETTER PAINT AND INTERNAL CORROSION CONTROL INTERNALLY IN THE TUBE.