What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Pilot stated, "at 15,500 feet I heard and felt a load bang. At first I thought the pressurization system had a failure because of what I physically felt. When I looked at the pressurization gauge all 3 needles indicated a problem. I requested an immediate decent to 10,000 feet. While descending, engine roughness was apparent so I declared an emergency and asked for vectors to sdf. When ATC tried to decent me to 4000 feet, I requested a higher approach in case the engine completely failed. ATC gave me pd for my altitude so I was on a high downwind for runway 17R. I was cleared to land at 7000 feet, number two behind southwest. I never had to apply any extra power due to my altitude and how close I was to sdf. As I backed the power to idle and landed, the engine stopped. ATC informed me we had black smoke coming from my aircraft on final. They gave me taxi instructions, and I responded that the engine had just quit and I was trying to coast to the taxiway and past the hold short line. When I made it past by just couple feet I informed the tower. I then shut down and secured the aircraft. Shortly after we immediately exited because of risk of fire."
ASI spoke with mechanic that did disassemble the engine and he stated that the aircraft lost a cylinder. Advised privacy data omitted to replace the cylinder. At time of closing investigation mechanic was waiting for privacy data omitted to decide how to proceed.
As the FAA filed it
PILOT STATED, "AT 15,500 FEET I HEARD AND FELT A LOAD BANG. AT FIRST I THOUGHT THE PRESSURIZATION SYSTEM HAD A FAILURE BECAUSE OF WHAT I PHYSICALLY FELT. WHEN I LOOKED AT THE PRESSURIZATION GAUGE ALL 3 NEEDLES INDICATED A PROBLEM. I REQUESTED AN IMMEDIATE DECENT TO 10,000 FEET. WHILE DESCENDING, ENGINE ROUGHNESS WAS APPARENT SO I DECLARED AN EMERGENCY AND ASKED FOR VECTORS TO SDF. WHEN ATC TRIED TO DECENT ME TO 4000 FEET, I REQUESTED A HIGHER APPROACH IN CASE THE ENGINE COMPLETELY FAILED. ATC GAVE ME PD FOR MY ALTITUDE SO I WAS ON A HIGH DOWNWIND FOR RUNWAY 17R. I WAS CLEARED TO LAND AT 7000 FEET, NUMBER TWO BEHIND SOUTHWEST. I NEVER HAD TO APPLY ANY EXTRA POWER DUE TO MY ALTITUDE AND HOW CLOSE I WAS TO SDF. AS I BACKED THE POWER TO IDLE AND LANDED, THE ENGINE STOPPED. ATC INFORMED ME WE HAD BLACK SMOKE COMING FROM MY AIRCRAFT ON FINAL. THEY GAVE ME TAXI INSTRUCTIONS, AND I RESPONDED THAT THE ENGINE HAD JUST QUIT AND I WAS TRYING TO COAST TO THE TAXIWAY AND PAST THE HOLD SHORT LINE. WHEN I MADE IT PAST BY JUST COUPLE FEET I INFORMED THE TOWER. I THEN SHUT DOWN AND SECURED THE AIRCRAFT. SHORTLY AFTER WE IMMEDIATELY EXITED BECAUSE OF RISK OF FIRE."
ASI SPOKE WITH MECHANIC THAT DID DISASSEMBLE THE ENGINE AND HE STATED THAT THE AIRCRAFT LOST A CYLINDER. ADVISED ^PRIVACY DATA OMITTED^ TO REPLACE THE CYLINDER. AT TIME OF CLOSING INVESTIGATION MECHANIC WAS WAITING FOR ^PRIVACY DATA OMITTED^ TO DECIDE HOW TO PROCEED.