What was found
AT ABOUT 500 FEET FOLLOWING DEPARTURE THE FLIGHT ATTENDANT REPORTED SMOKE AND FUMES FILLING THE AFT CABIN ACCOMPANIED BY THE AFT LAVATORY SMOKE DETECTORS IN ALARM. CREW PERFORMED COM PROCEDURES, DECLARED AN EMERGENCY, AND RETURNED TO AN UNEVENTFUL LANDING BACK AT MSP. THE LEFT PACK WAS SECURED AND THE SMOKE STARTED DISSIPATING. THE SMOKE WAS GONE BY THE TIME THE AIRCRAFT CLEARED THE RUNWAY. MAINTENANCE FOUND DE-ICING FLUID IN THE WATER SEPARATORS AND NO EVIDENCE OF FIRE OR FLAME. WATER SEPARATORS WERE REPLACED, PACK BURNOUT ACCOMPLISHED, AND THE AIRCRAFT HAS RETURNED TO SERVICE.