As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT ARRIVED FOR MX. THE RUDDER WAS REMOVED. SEVERE CORROSION WAS FOUND ON THE UPPER PART OF THE TORQUE TUBE. CORROSION HAD REACHED THE STAGE OF BLISTERED RUST AND THE L ANGLE ON ONE SIDE WAS EASILY SEPARATED WITH SMALL FORCE (ABOUT 1LBS WIGGLED TWICE).