As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SHORT FINAL APPROACH SMOKE ENTERED THE CABIN. THE PACKS WERE NOTICED TO BE RUNNING HOT PRIOR TO THIS OCCURANCE. MAINTENANCE REMOVED AND REPLACED THE 35 DEGREE ANTI-ICE VALVE AND FOUND THE LEFT COALESCER BAG TO BE ICED UP. ALSO THE PARKING BRAKE VALVE WAS FOUND TO BE LEAKING HYDRAULIC FLUID INTO THE APU INLET. THE PARKING VALVE WAS REMOVED AND REPLACED.