What was found
FLIGHT 4284 THE CREW REPORTED HEAVY DARK SMOKE IN THE COCKPIT AND ELECTRICAL BURN SMELL, WE DECLARED AN EMERGENCY, SMOKE CAME OUT OF CAPTAIN'S VENT BY WINDOW RAIL. THE AIRCRAFT LANDED WITHOUT INCIDENT WHERE MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE NR 1 ACM TO BE INTERNALLY BROKEN, PLACED THE #1 ACM ON MEL 21-51-00-3 CAT C, AND THE AIRCRAFT WAS APPROVED OF RETURN TO SERVICE. OPEN