What was found
WHILE IN CRUISE FLIGHT, ENGINE RAN ROUGH FOR APPROXIMATELY 5 SECONDS, THEN OIL PSI LIGHT AND FUEL LIGHT CAME ON. ENGINE WAS SHUT DOWN AND PROPELLER FEATHERED. ONCE ON GROUND, IT WAS DETERMINED THE ACCESSORY SECTION WAS NOT WORKING. SUSPECT EITHER A FAILED GEAR IN THE ACCESSORY SECTION OR POSSIBLY A BROKEN CRANKSHAFT. ENGINE TO BE REPLACED WITH A SERVICEABLE UNIT.