As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) PILOT REPORTED NOISE ON ROTOR RUN DOWN AND ALSO HAD EXPERIENCED AN UNEXPLAINED YAW DURING LAST FLIGHT. INSPECTION OF THE TAIL ROTOR PITCH CONTROL FOUND THAT THE BALL BEARING WITHIN THE ASSEMBLY WAS AT THE POINT OF SEIZURE. BEARING WAS MANUFACTURED BY MRC JAPAN P/N 105KSZZ H401.