As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT FELT EXCESSIVE VIBRATION AND HEADED BACK TO BASE, AFTER SHORT PERIOD VIBRATION INCREASED, PILOT LANDED IN FIELD. FOUND TAIL ROTOR HANGER BEARING SEIZED AND SPUN IN BEARING HOUSING. THE BEARING THAT FAILED IS THE FIRST BEARING AFT LOCATED JUST FORWARD OF OIL COOLER BLOWER.