As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)THE MAIN ROTOR HEAD WAS BEING REPAIRED FOR GREASE LEAKAGE PAST THE SEAL SLEEVE 'O' RING. PRIOR TO REINSTALLATION OF THE MAIN ROTOR GRIP, IT WAS NOTICED THAT FIVE OF THE INBOARD BEARING CAGE BARS HAD CHAFED THROUGH. ALL ROLLERS REMAINED IN PLACE.