As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAINTENANCE RECORDED THAT THE FLIGHT CREW COMPLAINED ABOUT SMOKE / ELECTRICAL BURNING SMELL IN THE COCKPIT AND CABIN. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE #2 ACM TO BE THE CAUSE OF THE ISSUE. MAINTENANCE REMOVED AND REPLACED THE #2 ACM, OPERATIONALLY TESTED WITH NO DEFECTS AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.