As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GNDED. IN CRUISE WE GOT A SMOKE LAVATORY SMOKE ECAM MSG THAT LASTED FOR LESS THAN A MINUTE. NO SMOKE OR REASON FOR MSG WAS FOUND. RESET SMOKE DETECTOR CONTROL UNIT CB IAW TSM 24-00-00-818-810. OPERATIONAL CHECKED SMOKE DETECTORS IAW AMM 26-16-00-710-001A, WITH NO DEFECTS NOTED.