As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONE BOLT AND NUT WERE FOUND SEPARATED FROM TAIL ROTOR DRIVESHAFT. THE DRIVESHAFT DISCONNECTED AND BROKE A FITTING ON POWER TURBINE GOVERNOR. THIS RESULTED IN LOSS OF TAIL ROTOR AUTHORITY AND ENGINE POWER. PILOT PERFORMED AN EMERGENCY LANDING.