As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ECAM AURAL ALERT, RED MASTER WARNING WITH BELL, SMOKE INDICATION IN LAVATORY BUT NOT SURE WHICH LAVATORY AND FLIGHT ATTENDANTS COULDN'T FIND ANY INDICATIONS OF SMOKE. MAINTENANCE NOTED THE POST FLIGHT REPORT INDICATED SMOKE WARNING WITH NO ASSOCIATED FAULT. INSPECTED ALL LAVATORIES FOR POSSIBLE SOURCE OF SMOKE, NOTHING FOUND. ACCOMPLISHED LAVATORY SMOKE DETECTION SYSTEM TEST PER AMM 26-17-00, NO FAULT REPORTED.