As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN CABIN FROM AIR CONDITIONER. THE AMT ARRIVED AND INSPECTED THE SYSTEM. EVERYTHING WORKED AS ADVERTISED AND THEY RAN THE AIRCRAFT FOR 10 MINUTES WITH NO DEFECTS NOTED. THE CREW STATED THEY DID NOT SMELL ANYTHING. WE SUSPECT IT MAY HAVE BEEN BRUSH DUST OR EVEN REAL FINE DUCTING FOAM THEY SAW WHEN THE SYSTEM WAS TURNED ON.