As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT CREW NOTICED SMOKE IN CABIN AND SMELLED SMOKE. AIRCRAFT WAS TAKEN TO REPAIR STATION AND THEY FOUND THE BLOWER TO BE INOPERATIVE AND SMELLING STRONGLY OF BURNED WIRING. THEY INSTALLED AN OVERHAULED SYSTEM, OPS CHECKED OK. DUE TO NORMAL WEAR.