As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CYLINDER CRACKED COMPLETELY AT EXHAUST ROCKER ARM. THE ROCKER ARM CEASED TO FUNCTION THROWING THE FLOATING CAM RING OUT OF TIME. ENGINE QUIT, LANDED IN ROAD, CHANGED CYLINDER, FLEW HOME. SUSPECT POSSIBLE OVER-TORQUING OF ROCKER ARM SHAFT OR STUCK EXHAUST VALVE. RECOMMEND CHECKING ANY OIL LEAKS AT VALVE ROCKER ARM AND SHAFT NUTS.