As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RUDDER TORQUE TUBE AREA IS RUSTED, REMOVED THE RUDDER TORQUE TUBE AND INSTALLED NEW TORQUE TUBE. CORROSION WAS FOUND ON THE LOWER RUDDER RIB WHILE REPLACING THE TORQUE TUBE. REPAIRED THE LOWER RUDDER TORQUE TUBE RIB IAW ERO-889729, REV IR.