As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ANC - FLT 1133 - AIR RETURN DUE TO SMOKE IN COCKPIT. ACFT LANDED ANC WITHOUT INCIDENT. MAINTENANCE FOUND THE COPILOTS COCKPIT LIGHTS DIMMING RHEOSTAT DEFECTIVE. THE RHEOSTAT WAS REMOVED AND REPLACED AND THE ACFT WAS RETURNED TO SERVICE. (Z)