As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DAILY SERVICE CHECK WHEN MAIN ROTOR BLADES WERE BEING ROTATED TO BE SECURED. BINDING/ RATCHETING NOISE WAS HEARD WHEN MAIN ROTOR BLADES WERE ROTED. FURTHER INVESTIGATION REVEALED THAT NOISE WAS COMING FROM NR4 TAIL ROTOR DRIVESHAFT BEARING. BEARING DID NOT LOOK OVERHEATED.