As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU SMOKING EXCESSIVELY AND FLUID DRIPPING FROM EXHAUST AND INSULATION BLANKET. SMOKE GETTING INTO CABIN. ORD 12/17/97 RAN APU AND PACKS. FOUND NO SMOKE OR FLUID DRIPPING FROM EXHAUST DUCT. SUSPECT DEICER FLUID IN EXHAUST. AIRPLANE PREVIOUSLY IN DEN.