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 FIRE WARNING LIGHT CAME ON MOMENTARILY. FLIGHT ATTENDANT SAID RIGHT AFT LAVATORY LIGHT CAME ON THEN WENT OFF. NO SMOKE OR FUMES FROM THE LAVATORY WAS SMELLED BY FLIGHT ATTENDANT. ACCOMPLISHED TSM 26-17-00-810-815-A REST PASSED NO OTHER MAINTENANCE ACTION IS NECESSARY.