What was found
IN FLIGHT AT LOW CRUISE SETTING, PILOT REPORTED HEARING A BANG, FELT A "SHUTTER", AND EXPERIENCED A LOSS OF POWER IN THE LEFT ENGINE. ENGINE WAS SHUT DOWN, PROP FEATHERED, AND AIRCRAFT LANDED SAFELY. THE ENGINE CASE WAS FOUND CRACKED. THE ENGINE WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE. ENGINE IS CURRENTLY BEING STORED. NO DISASSEMBLY OR INVESTIGATION HAS TAKEN PLACE.