As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT 2514 - ON CLIMB RECEIVED A LAVATORY SMOKE WARNING. NO SMOKE OR FIRE NOTICED. WENT OUT IN 30 SECONDS. MAINTENANCE FOUND THE SENSOR DIRTY. CLEANED AND OPERATIONAL CHECKED IAW 26-16-00-710-8D-A01. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED. (A)