As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE) FLIGHT NR 3230, THE CREW REPORTED THE COCKPIT AND CABIN FILLED WITH SMOKE ON DESCENT INTO CLEVELAND.THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED THE NR 1 AND NR 2 BLEED AIR SYSTEM,THE NR 1 AND NR 2 ENGINES AND APU. NO DEFECTS WERE FOUND. MAINTENANCE SUSPECT GLYCOL ODOR.