As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING ELECTRICAL TROUBLESHOOTING FOR THE RUDDER WIRING, RUDDER COUNTERWEIGHT ATTACH RIVETS WERE EITHER WORN THROUGH THE MOUNTING BRACKET OR MISSING. ONLY 1 OF THE 8 ATTACH RIVETS WAS ENGAGED IN THE COUNTERWEIGHT. SEIZURE OF THE RUDDER ASSY COULD OCCUR SHOULD THE COUNTERWEIGHT BECOME DETACHED.