As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE FLIGHT APPROXIMATELY 2.5NM, ENGINE BEGAN VIBRATING WITH YAW INDICATING POWER LOSS. EMERGENCY DECENT INITIATED ANDWAS CONTACTED FOR LANDING CLEARANCE. ENGINE MAINTAINED RPM IN DESCENT AND A NO HOVER LANDING WAS CARRIED OUT TO THE APRON. TROUBLESHOOTING REVEALED A BROKEN INTAKE VALVE ON CYLINDER 1. VALVE STEM FAILED BELOW THE KEEPERS.