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 3F1LC SMOKE DETECTOR AURAL ALERT. NO SMOKE FOUND. INSPECTED LAVATORY 3L1LC SMOKE DETECTOR FOR DAMAGE AND DEFECTS, NONE FOUND. ACCOMPLISHED OPERATIONAL TEST PER AMM 26-13-00. ALL TEST INDICATIONS WERE NORMAL.