As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THE TAIL BOOM FORWARD ATTACH FITTING FAILED DURING A SUDDEN APPLICATION OF POWER WHILE RECOVERING FROM A SIMULATED AUTOROTATION. OTHER EVIDENCE SUGGESTS THE FITTING LUG MAY HAVE FAILED DUE TO TAIL ROTOR CONTACT WITH SOFT GROUND.