As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)ENGINE WAS RUNNING ROUGH ON TAKEOFF POST FLIGHT INSPECTION FOUND #3 CYLINDER SEPARATED AT THE BARREL/HEAD, BARREL WAS BROKEN OFF AT THE LAST THREADTHE DOME AND THE EXHAUST PORT WERE OIL FOULED THEEXHAUST VALVE WAS POUNDED INTO THE SEAT. THIS ENGINE IS BEING OPERATED USING AUTOMOTIVE GASOLINE.