What was found
CREW REPORTED SMOKE IN THE COCKPIT AND FWD CABIN IN FLIGHT, SMOKE SMELLED ELECTRICAL AND DISSIPATED AFTER A COUPLE OF MINUTES. NO ABNORMAL INDICATIONS IN FLIGHT. PACK 1 OVERHEAT MESSAGE APPEARED MOMENTARILY AFTER LANDING. LANDED WITHOUT INCIDENT, MX INSPECTED ACFT, AND FOUND THE NR 1 ACM TO BE LOCKED UP. MX R & R NR 1 ACM, OPS TESTED WITH NO DEFECTS NOTED, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.