As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: LAVATORY 3LC SMOKE ALARM ALERTED. FLIGHT ATTENDANTS FOUND NO EVIDENCE OF SMOKE. A PAX HAD JUST EXITED THE LAV. ALARM WAS RESET AND DID NOT ALERT AGAIN. PERFORMED OPS CHECK OF SMOKE DETECTION SYSTEM AT LAVS 3F-1LC AND 3F-1RC. NO DISCREPANCIES NOTED IAW AMM 26-13-00.