As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN CRUISE FLIGHT. PILOT NOTICED THAT THE MAIN ROTOR NR 2 STARTED TO OVER-SPEED. PILOT LANDED AIRCRAFT SAFELY UNDER ITS OWN POWER. AFTER INVESTIGATING CAUSE, IT WAS FOUND THAT THE ENGINE FUEL CONTROL SHAFT BEARING HAD FAILED CAUSING FUEL CONTROL TO GO ERRATIC.