As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: THE FLIGHT CREW REPORTED THAT WHILE AT CRUISE THEY RECEIVED AN AFT LAVATORY SMOKE WARNING ECAM THAT ONLY LASTED FOR ABOUT 2 SECONDS AND DISAPPEARED. THE FLIGHT ATTENDANTS INVESTIGATED AND FOUND ALL LAVATORIES WERE FREE OF SMOKE. THE FLIGHT CREW REPORTED THATT THEY CONTINUED THE FLIGHT WITHOUT ANY FURTHER ISSUE. MAINTENANCE RESET SMOKE, LAVATORY CIDS SYSTEM, FWC IAW AMM 26-00-00 & 34-00-00. ACCOMPLISHED A SATISFACTORY OPS CHECK WITH NO ISSUES NOTED.