As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVATORY SMOKE LIGHT ILLUMINATED IN FLIGHT FOR ABOUT ONE MINUTE. ALARM SOUNDED IN LAVATORY IN A NON- CONTINUOUS MANNER. NO SMOKE PRESENT DUIRNG INSPECTION. ACCOMPLISHED A SELF TEST OF THE AFT LEFT LAVATORY SMOKE DETECTOR IAW MM 26-14-00. CHECKED OK. ACFT OK FOR SERVICE.