As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS NOT GROUNDED. ENROUTE, LAVATORY SMOKE ANNUNCIATOR LIGHT ILLUMINATED FOR ABOUT 10 SECONDS THEN WENT OUT. FLIGHT ATTENDANT CONFIRMED THE ALARM WAS FROM THE RIGHT AFT LAVATORY AND THAT NO SMOKE WAS PRESENT. ACCOMPLISHED SMOKE DETECTOR SELF TEST RIGHT HAND AFT LAVATORY PER AMM 26-14-00. OPERATIONS CHECK OK.