As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE TAXIING AND AFTER STARTING THE COMBUSTION HEATER, SMOKE ENTERED THE CABIN. THE CREW SHUT DOWN THE AIRCRAFT AND DEPLANED THE PASSENGERS AND THEMSELVES. MAINTENANCE DETERMINED THAT THE COMBUSTION HEATER GROUND BLOWER HAD OVERHEATED.