As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS NOT GROUNDED. SMOKE LAVATORY SMOKE ECAM WARNING SOUNDED FOR ABOUT TWO SECONDS, WAS SO QUICK AND FLIGHT ATTENDANT COULD NOT IDENTIFY WHICH LAVATORY. ALL LAVATORIES INSPECTED. NOTHING ABNORMAL. ACCOMPLISHED SMOKE TEST PER TSM 26-17-00.