As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: LAVATORY SMOKE WARNING APPEARED VERY BRIEFLY TWICE. IDENTIFIED AS LAVATORY BY FLIGHT ATTENDANTS WITH NO EVIDENCE OF SMOKE. NO SMOKE NOTED BY FLIGHT ATTENDANT. ACCOMPLISHED SATISFACTORY OPERATION CHECK OF SMOKE DETECTOR SYS 26-17-00.