As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVATORY SMOKE MESSAGE WAS RECEIVED BY THE FLIGHT CREW BUT THE RETURN TO SEAT LIGHT SELECTED WAS OFF. THE SMOKE DETECTOR AND COALESCER BAG WERE REPLACED AND A SATISFACTORY OPERATIONAL CHECK WAS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.