What was found
THE CREW REPORTED AN ELECTRIC BURNING ODOR AND SMOKE IN THE COCKPIT DURING FLIGHT. THE ACFT LANDED WITHOUT INCIDENT WHERE MAINTENANCE INSPECTED THE ACFT AND FOUND THE NR 1 ACM TO BE FROZEN. MAINTENANCE PLACED THE NR 1 PACK ON MEL, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE. MAINTENANCE R & R THE NR 1 ACM, OPERATIONALLY TESTED WITH NO DEFECTS, REMOVED THE MEL, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.