What was found
ON FLIGHT 3856 THE CREW REPORTED, RECEIVED A SMOKE AFT LAVATORY WARNING MESSAGE AFTER LANDING. THE FLIGHT ATTENDANT REPORTED SMELLING SMOKE. FIRE, CRASH AND RESCUE WERE DISPATCHED. THE AIRCRAFT DEPLANED NORMALLY. THE AIRCRAFT WAS REMOVED FROM SERVICE. RESET CIRCUIT BREAKERS TO POWER SYSTEMS. OPERATED LIGHTS AND EXHAUST FAN FOR 3 HOURS. FLUSHED THE TOILET. INSPECTED ALL AREAS OF THE LAVATORY FOR SMOKE/ODOR, HAD CREW RUN ENGINES/PACKS. PERFORMED LAVATORY SMOKE DETECTOR TEST PER AMM 26-12-00 THE OPERATIONAL CHECKS WERE NORMAL. NO SMOKE OR ODOR DETECTED. NO PARTS REMOVED OR REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE.