As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE FLIGHT THE PILOT NOTED UNUSUAL NOISE FROM THE ENGINE ALONG WITH VIBRATION IN THE TAIL ROTOR PEDALS. PILOT IMMEDIATELY LANDED. PILOT NOTED A LARGE AMOUNT OF BLUE SMOKE COMING FROM THE ENGINE EXHAUST PIPE. ACFT WAS RECOVERED BY THE OPERATOR. INITIAL ENGINE INSPECTION FOUND FAILURE OF NR 1 CYLINDER INTAKE VALVE.