As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL ROTOR CUFF SPLIT IN TWO AT THE INBOARD BOLT HOLE. OUTBOARD SECTION AND CONTROL ROTOR TUBE ASSEMBLY SEPARATED FROM HELICOPTER CAUSING LOSS OF CONTROL. CRACK APPEARS TO HAVE STARTED AT INBOARD BOLT HOLE. BOTH HALVES OF CUFF SENT TO NTSB LAB FOR ANALYSIS. LIFE LIMIT: 6,860 HOURS. AIRCRAFT TT: 22,145.3 HOURS.