As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH SLIGHT FORWARD DISPLACEMENT OF THE CYCLIC ON THE GROUND AT FLIGHT RPM AIRCRAFT WOULD DEVELOP A DIVERGENT LONGITUDINAL BOUNCE. FOUND ONE SIDE OF BEARING FAILED ON COLLECTIVE BELLCRANK LOCATED AT TRANSMISSION SUPPORT. THERE WAS NO INDICATION OF WEAR OR LOOSE BEARING ON DAILY PRIOR TO FAILURE. SCRAPPED.