As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT AFT LAVATORY SMOKE DETECTOR AURAL AND VISUAL ALERT SIGNAL ACTIVATED WHILE PASSENGER WAS IN LAVATORY. NO SMOKE OR ODOR DETECTED AND SIGNAL STOPPED AFTER A FEW MINUTES. PERFORMED SMOKE DETECTION SELF TEST IAW AMM 26-14-00. OPERATIONAL CHECK GOOD.