What was found
PILOT REPORTED LOSS OF ELECTRICAL POWER. AFTER LANDING, UNCOWLED ENGINE AND FOUND THE ACU WAS SMOKED. TROUBLESHOT AND FOUND THE ALTERNATOR WINDINGS OPEN. INSTALLED A NEW ACU AND INSTALLED A SERVICEABLE ALTERNATOR, PN C611503-0102. PERFORMED GROUND RUN, OPERATIONAL CHECK OF THE ALTERNATOR CHARGING SYSTEM FOUND OK.