As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVATORY SMOKE DETECTION SYSTEMS MEL NUMBER ADDED FOR DISPATCH RELEASE, LOG REDEFERRAL REQUIRED. AFT LEFT LAV SMOKE DET ALARM ACTIVATED ON FINAL AND STOPPED BEFORE LANDING.. PILOT REPORTED NO SMOKE OR FUMES.. HAS HISTORY. REPLACED AFT LAV SMOKE DETECTOR. (LP5092586)