As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWA - FLT 120G - THE CREW REPORTED THAT SMOKE ENTERED THE CABIN IN-FLIGHT DURING SINGLE ENGINE SIMULATION, THE AIRCRAFT RETURNED TO FWA WITHOUT FURTHER INCIDENT. MAINTENANCE PLACED THE RIGHT ENVIRONMENTAL BLEED AIR SYSTEM ON MEL NR 21-14 CONTROL NR 183678 CAT 'C'. THE AIRCRAFT WAS RELEASED TO SERVICE. (X)