As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ASH - CLT CREW FOUND CABIN FILLED WITH SMOKE UPON ARRIVAL TO AIRCRAFT. MAINTENANCE TROUBLESHOT FAULT TO BURNT CABIN SUPPLY DUCTS UNDER THE FLOORBOARDS AND ARE WAITING FOR REPLACEMENT PARTS. MAINTENANCE REPLACED DUCTS AND TEMP SWITCH P/N 1173T0783, CABIN SUPPLY OVERTEMP SWITCH P/N 815291-61, AMBIENT TEMP SWITCH P/N 815289-2.