As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: SMOKE IN LAVATORY ECAM POPPED UP. FLIGHT ATTENDANTS VERIFIED NO SMOKE WAS IN LAVATORY. MAINTENANCE ACCOMPLISHED A RESET AND AN OPERATIONAL CHECK OF THE SMOKE DETECTOR CONTROL UNIT (SDCU) PER AMM 26-17-00 WITH NO FAULTS NOTED.