As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, FLIGHT ATTENDANTS REPORTED SMOKE IN THE CABIN. DECLARED AN EMERGENCY AND RETURNED TO MEM WITH AN UNEVENTFUL LANDING. MAINTENANCE REPLACED THE RIGHT WATER SEPARATOR. INSPECTED TAIL. LEAK AND OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.