What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The pilot was in cruise flight at 2500 feet MSL when the engine began to run rough. The oil pressure remained green but the oil temperature began to rise. The pilot applied full power but was unable to maintain airspeed. The engine continued to run rough and shake so the pilot contacted montgomery approach to receive local traffic frequency for Wetumpka, AL and informed them of his intention to land at 08A. The pilot landed runway 27 and taxied off the runway and shutdown aircraft systems with no injuries reported. Post flight inspection revealed a 2 inch hole of an undetermined origin in the upper side of the engine case adjacent to the number 1 cylinder.
As the FAA filed it
THE PILOT WAS IN CRUISE FLIGHT AT 2500 FEET MSL WHEN THE ENGINE BEGAN TO RUN ROUGH. THE OIL PRESSURE REMAINED GREEN BUT THE OIL TEMPERATURE BEGAN TO RISE. THE PILOT APPLIED FULL POWER BUT WAS UNABLE TO MAINTAIN AIRSPEED. THE ENGINE CONTINUED TO RUN ROUGH AND SHAKE SO THE PILOT CONTACTED MONTGOMERY APPROACH TO RECEIVE LOCAL TRAFFIC FREQUENCY FOR WETUMPKA, AL AND INFORMED THEM OF HIS INTENTION TO LAND AT 08A. THE PILOT LANDED RUNWAY 27 AND TAXIED OFF THE RUNWAY AND SHUTDOWN AIRCRAFT SYSTEMS WITH NO INJURIES REPORTED. POST FLIGHT INSPECTION REVEALED A 2 INCH HOLE OF AN UNDETERMINED ORIGIN IN THE UPPER SIDE OF THE ENGINE CASE ADJACENT TO THE NUMBER 1 CYLINDER.