As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, ECAM MESSAGE OF SMOKE IN LAVATORY APPEARED WITH AUDIO WARNING. FLIGHT ATTENDANTS CHECKED ALL LAVATORIES AND FOUND NO INDICATION OF FIRE OR SMOKE. ECAM MESSAGE LASTED ABOUT 5 SECONDS AND THEN WENT AWAY AND SHOWED NORMAL. ACCOMPLISHED TSM 26-15-00-810-803A, NO FAULTS NOTED AND INSPECTED LAVATORIES.