What was found
FLIGHT 5869 THE CREW REPORTED SMOKE IN THE COCKPIT. THE AIRCRAFT RETURNED, WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND PLACED THE NR 1 ACM ON MEL, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. MAINTENANCE REMOVED AND REPLACED THE NR 1 ACM, OPERATIONALLY TESTED WITH NO DEFECTS, AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.