As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE TBO REPLACEMENT, DISCOVERED THE NEWLY OVERHAULED TAIL ROTOR DRIVESHAFT FORWARD END WAS UNPAINTED CAUSING AN UNSERVICEABLY LOOSE FIT OF THE NR 5 BEARING. MANUFACTURER TECHNICAL REPRESENTATIVES VERIFIED THAT THE AREA IN QUESTION IS SUPPOSED TO BE PAINTED UP TO THE SPLINES. PART WAS RETURNED FOR FURTHER REWORK.