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 ECAM ACTIVATED IN FLIGHT FOR 1 SECOND. MAINTENANCE CHECKED THE SDF 1 AND ADF 2 SMOKE WARNINGS REPORT ON ON THE MCDU WITH NO FAULTS NOTED, RESET SYSTEM PER AMM 26-17-00-710-001 AND NO FAULTS WERE NOTED.