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 LAVATORY SMOKE MASTER WARNING THAT LASTED 5 SECONDS THEN CLEARED ITSELF AND NOTHING FOUND BY FLIGHT ATTENDANT INSPECTION. MAINTENANCE ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK OF THE LAVATORY SMOKE DETECTION SYSTEM PER AMM 26-17-00 WITH NO ECAM MESSAGES NOTED.