As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE ALARM SOUNDED AT CRUISE WITH PASSENGER IN FIRST CLASS LAV. PASSENGER SMELLED AND APPEARED LIKE HE WAS SMOKING IN THE LAV WHEN DOOR OPENED ALARM STOP SOUNDING. INSPECTED SMOKE DETECTOR AND FOUND IT WAS NOT TAMPERED WITH. SYSTEM OPERATION IS NORMAL.