As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C 197PQ DIVERTED INTO TYS DUE TO SMOKE IN THE COCKPIT. THE SMOKE CLEARED AS ACFT BEGAN DESCENT. LANDED WITHOUT INCIDENT. UPON INSPECTION MAINTENANCE FOUND THE LEFT ACM WAS SERGING AND CAUSING THE SMOKE. MAINTENANCE DEFERRED IT WITH THE INTENT TO REPLACE DUE TO NO PARTS AVAILABLE.