As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN ROTOR HEAD WAS IN FOR SCHEDULED OVERHAUL. ON DISASSEMBLY, FOUND THE INNER RACE OF ONE BEARING ON THE HORIZONTAL AXIS OF THE VERTICAL HINGE ASSEMBLY HAD FOUR CHIPS. TWELVE ROLLERS THAT CONTACTED THE CHIPPED INNER RACE WERE DAMAGED BY RUBBING.