As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV SMOKE MESSAGE ILLUMINATED DURING DESCENT WITH PASSENGER IN FORWARD LAV NO EVIDENCE OF SMOKE OR FIRE. REMOVED FROM SERVICE. PERFORMED LAVATORY SMOKE DETECTOR SYSTEM TEST PER AMM 26-14-01-700-801A TEST OK. C/W GVI ON FWD LAV. NO DEFECTS NOTED. RETURNED TO SERVICE.