As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT CREW REPORTED THAT AT 17:13 ZULU SMOKE LAVATORY SMOKE ECAM ILLUMINATED. FLIGHT ATTENDANTS COULD NOT IDENTIFY WHICH LAVATORY ACTIVATED THE WARNING. MAINTENANCE ACCOMPLISHED A TEST OF THE SMOKE SYSTEM USING THE MCDU WITH NO FAULTS NOTED AND RESET THE SYSTEM.