As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE TOILET CAUTION ON FINAL APPROACH MESSAGE CAME ON AFTER STARTING APU. F/A CONFIRMED NO FIRE AND HALON BOTTLE DID NOT DISCHARGE. MESSAGE LASTED FOR APPROX A MINUTE AND THEN WENT OUT, IT DID NOT COME BACK ON. PERFORMED OP CHECK OF LAV SMOKE DET AND INSPECTED LAV IAW AMM 26-16-00. NO DEFECTS NOTED. NO MSG'S PRESENT. OK FOR SVC.