What was found
AIRCRAFT EXPERIENCED AN IN-FLIGHT ELECTRICAL FAILURE. UPON LANDING, ALTERNATOR WAS FOUND HANGING FROM THE BELT TENSION BRACKET. THE PRIMARY MOUNT BOLT, AN7-43A, WAS FOUND IN THE LOWER COWLING. WHEN THE MOUNT BOLT FELL OUT, THE COOLING FAN CONTACTED THE ENGINE CASE AND STOPPED THE ALTERNATOR. WITH THE ENGINE RUNNING AND THE ALTERNATOR LOCKED UP, THE ALTERNATOR BELT BURNED UP ON THE ALTERNATOR PULLEY. ALTERNATOR BELT HAD RECENTLY BEEN TIGHTENED. (X)