As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, PILOT REPORTED A VIBRATION COMING FROM THE TAIL OF THE AIRCRAFT. THE AIRCRAFT LANDED WITH NO PROBLEMS. MAINTENANCE PERSONNEL FOUND RUDDER TRIM TAB ROD END AT THE RUDDER TRIM TAB ACTUATOR HAD BROKEN INTO TWO PIECES CAUSING THE TRIM TAB AND RUDDER TO FLUTTER. PART TOTAL TIME IS UNKNOWN. AIRCRAFT TOTAL TIME IS 6451.0.