What was found
TPA - EN ROUTE IN CRUISE FLIGHT, TWO 'POPS' WERE HEARD, LEFT ENGINE. TORQUE DROPPED, PRESSURES DROPPED, PILOT FEATHERED ENGINE AND SHUT DOWN ENGINE. LANDED TPA. PILOT'S INSPECTION NOTED HOLES IN EXHAUST STACKS AND OIL ALL OVER NACELLE AND FUSELAGE. AIRCRAFT GROUNDED.