What was found
PILOT REPORTED SEVERE ENGINE VIBRATION FOLLOWING POWER REDUCTION ON INITIAL CLIMB-OUT AFTER DEPARTURE FROM AIRPORT. ENGINE SHUTDOWN AND FEATHERED. NOTED CATASTROPHIC LEFT ENGINE FAILURE UPON INITIAL INSPECTION. NR 5 CONNECTING ROD OBSERVED WITH CLEAN BREAK THROUGH LARGE HOLE IN CRANKCASE; NR 6 CONNECTING ROD SEVERELY BENT. NR 5, NR 6 PISTONS DAMAGED SEVERELY AND SEIZED IN CYLINDERS. OBSERVED CAMSHAFT BROKEN; FOUND PISTON PIN LOOSE WITH OTHER CRANKCASE AND CYLINDER BROKEN PARTS. EXACT FAIL MODE UNDETERMINED. ENGINE RECORDS NOT SUPPLIED.