As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE INVESTIGATING AN OIL LEAK IN THE AREA OF THE TAIL ROTOR DRIVE QUILL AT THE REAR OF THE MAIN GEARBOX, THE AME REMOVED THE SUSPECTED LEAKING SEAL. IT WAS FOUND THAT THE INNER CAGE OF THE BEARING HAD BROKEN AND THE BALL BEARINGS WHERE LOOSE IN WHAT REMAINED OF THE BEARING.