As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVATORY SMOKE DETECTOR SOUNDED IN LAVATORY D AT TOP OF DESCENT, FL 350 AND WAS RESET BY FLIGHT ATTENDANT. NO SMOKE WAS DETECTED. SMOKE ALARM WAS ACCOMPANIED BY MASTER WARNING ON ECAM. MAINTENANCE ACCOMPLISHED TSM PROCEDURE PER 26-17-00, NO FAULTS DETECTED. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.