What was found
FLIGHT ATTENDANT NOTIFIED CREW OF THE RIGHT AFT LAV SMOKE DETECTOR IN ALARM ALONG WITH A SMELL OF SMOKE IN THE AFT CABIN. AN EMERGENCY WAS DECLARED AND A SAFE LANDING WAS MADE IN JAX. NO EVIDENCE OF FIRE OR SMOKE WAS FOUND AFTER LANDING. SOME OIL RESIDUE WAS FOUND IN THE RIGHT WATER SEPARATOR TEMPERATURE CONTROL VALVE. REPLACED THE RIGHT WATER SEPARATOR TEMPERATURE CONTROL VALVE. REPLACED THE RIGHT WATER SEPARATOR BAG PRECAUTIONARY. AIRCRAFT RETURNED TO SERVICE.