What was found
PILOT STATED IN CRUISE, THE RT ENGINE STARTED RUNNING SLIGHTLY ROUGH. AFTER A CHECK OF THE ENGINE GAUGES, PILOT NOTED A SLIGHT DROP IN THE MANIFOLD PRESSURE FOLLOWED BY A DECREASE IN OIL PRESSURE. THE ENGINE WAS FEATHERED AND SECURED AND A SINGLE ENGINE LANDING WAS MADE AT LYH. AFTER EXAMINING THE RT ENGINE, FOUND THE NR 2 CYLINDER HAD CRACKED AROUND THE MID-SECTION CAUSING THE CYLINDER HEAD TO FAIL.