As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE COMPLETING A GROUND RUN FOR MAINTENANCE, A VIBRATION WAS FELT, AIRCRAFT WAS SHUTDOWN, AND FOUND THE IB FEATHERING BEARING ON THE TAIL ROTOR BLADE LOOSE IN THE BORE. NEW STYLE BEARINGS 222-312-761-101 INSTALLED IAW TB 222U-06-99 AT TIME SINCE REPAIRED.