As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE FLIGHT, THE PILOT FOUND THAT WHEN HE TURNED THE TAIL ROTOR IN THE DIRECTION OF ROTATION HE HEARD A POPPING NOISE COMING FROM THE TAIL ROTOR DRIVE SHAFT. UPON FURTHER INSPECTION FOUND THAT ONE OF THE BEARINGS THAT HOLDS THE TAIL ROTOR DRIVE SHAFT WAS BAD.