What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
This was the third flight since the engine was major overhauled. After approximately one hour of flight at 3,500’ abeam ktlh, the engine developed roughness and, within several seconds, a loud ‘pop’ was heard. Until this point, all engine indications were normal. PIC declared an emergency and requested and received an immediate landing clearance. He landed the aircraft without incident. A preliminary inspection indicated a connecting rod separated and penetrated the crankcase.
As the FAA filed it
THIS WAS THE THIRD FLIGHT SINCE THE ENGINE WAS MAJOR OVERHAULED. AFTER APPROXIMATELY ONE HOUR OF FLIGHT AT 3,500’ ABEAM KTLH, THE ENGINE DEVELOPED ROUGHNESS AND, WITHIN SEVERAL SECONDS, A LOUD ‘POP’ WAS HEARD. UNTIL THIS POINT, ALL ENGINE INDICATIONS WERE NORMAL. PIC DECLARED AN EMERGENCY AND REQUESTED AND RECEIVED AN IMMEDIATE LANDING CLEARANCE. HE LANDED THE AIRCRAFT WITHOUT INCIDENT. A PRELIMINARY INSPECTION INDICATED A CONNECTING ROD SEPARATED AND PENETRATED THE CRANKCASE.