As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT REPORTED HAZE AND SMOKE IN CABIN AFTER TAKEOFF. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND RIGHT AIR CYCLE MACHINE OVERSERVICED. DRAINED OIL TO PROPER LEVEL. ALSO CHANGED COALESCER BAGS. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.