As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE IN HOVER, AIRFRAME/DRIVETRAIN VIBRATION WAS FELT AND ROTORCRAFT THEN LANDED. SUBSEQUENT INVESTIGATION REVEALED THAT FREEWHEELING BEARING FAILED LEAVING SCATTERED FRAGMENTS. THERE WAS NO PRIOR INDICATION OF IMPENDING FAILURE. DGAC AD 82-062-030B WAS COMPLIED WITH 1 HOUR PRIOR TO FAILURE, HOWEVER, ALL OPERATING/INDICATIONS WERE NORMAL. AIRCRAFT WAS LOADED LIGHT AND WEATHER WAS CALM AND CLEAR.