What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
05/04/2023 1320 Pdt- toa airport-
Aircraft departed 29R for demo flight. At approximately 500FT AGL a loud bang was heard from engine compartment, engine stated vibrating violently and engine lost most of its power. Pilot radioed tower of an engine failure and would be returning to land. Pilot executed a 180 turn and landed 11L. Landing was long and aircraft could not be stopped before end of runway. Aircraft slid off end of 11L into a dirt field and came to a stop. Aircraft sustained two flat tires due to locked up brakes and wearing through both tires with no further damage. Aircraft was towed to parking.
Investigation revealed #1 cylinder head cracked completely off at head/cylinder junction. Investigation revealed cylinder had 1100 hrs since new with no maintenance performed since installation. Investigation of mechanic who did last inspection did not reveal any abnormalities, or known defects.
As the FAA filed it
05/04/2023 1320 PDT- TOA AIRPORT-
AIRCRAFT DEPARTED 29R FOR DEMO FLIGHT. AT APPROXIMATELY 500FT AGL A LOUD BANG WAS HEARD FROM ENGINE COMPARTMENT, ENGINE STATED VIBRATING VIOLENTLY AND ENGINE LOST MOST OF ITS POWER. PILOT RADIOED TOWER OF AN ENGINE FAILURE AND WOULD BE RETURNING TO LAND. PILOT EXECUTED A 180 TURN AND LANDED 11L. LANDING WAS LONG AND AIRCRAFT COULD NOT BE STOPPED BEFORE END OF RUNWAY. AIRCRAFT SLID OFF END OF 11L INTO A DIRT FIELD AND CAME TO A STOP. AIRCRAFT SUSTAINED TWO FLAT TIRES DUE TO LOCKED UP BRAKES AND WEARING THROUGH BOTH TIRES WITH NO FURTHER DAMAGE. AIRCRAFT WAS TOWED TO PARKING.
INVESTIGATION REVEALED #1 CYLINDER HEAD CRACKED COMPLETELY OFF AT HEAD/CYLINDER JUNCTION. INVESTIGATION REVEALED CYLINDER HAD 1100 HRS SINCE NEW WITH NO MAINTENANCE PERFORMED SINCE INSTALLATION. INVESTIGATION OF MECHANIC WHO DID LAST INSPECTION DID NOT REVEAL ANY ABNORMALITIES, OR KNOWN DEFECTS.