As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT ATTENDANT REPORTED LAVATORY E SMOKE DETECTOR ACTIVATED THEN SILENCED ON ITS OWN. LAVATORY WAS UNOCCUPIED AT THE TIME. MAINTENANCE INSPECTED, RESEATED SMOKE DETECTOR, AND PERFORMED SATISFACTORY OPERATIONAL CHECK PER AMM 26-12-00.