As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: IN FLIGHT ECAM SMOKE LAVATORY, SMOKE MASTER WARNING. FLIGHT ATTENDANTS REPORTED NO FIRE OR SMOKE. WARNING EXTINGUISHED ON ITS OWN WITHIN A MINUTE. MAINTENANCE PERFORMED A SATISFACTORY OPERATIONAL CHECK PER AMM 26-17-00 WITH NO FAULTS NOTED.