As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MDW - FLT 866 - DURING TAXI, THE PACKS WERE STARTED AFTER DE-ICING, SMOKE OR FUME WAS GENERATED INTO THE CABIN AND COCKPIT FOR ABOUT 5 MINUTES. RETURNED TO GATE. PERFORMED INSPECTION AND REMOVAL OF COALESCER BAGS SHOWED DE-ICE FLUID CONTAMINATION. REPLACED COALESCER BAGS IN AIR CONDITIONING SYSTEM PER MM 21-00-01, OK FOR SERVICE. (M)