As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE TOILET EICAS & WARNING HEARD, FA CHECKED THE LAVATORY. NO SMOKE NOTED. MESSAGE & WARN WENT AWAY ON ITS OWN AFTER 60 SECONDS. PERFORMED OPS CHECK OF THE LAVATORY SMOKE DETECTION SYSTEM. OPS CHECKED GOOD. NO MESSAGES NOTED. ACFT OKAY FOR SERVICE.