As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DURING CRUISE RECEIVED A SMOKE WARNING AND CHIME FOR LAVATORY 3F1RC. FLIGHT ATTENDANTS INSPECTED AND FOUND NO EVIDENCE OF SMOKE OR FIRE. ACCOMPLISHED SATISFACTORY SMOKE DETECTOR SYSTEM TEST PER AMM 26-13-00. NO FAULTS NOTED.