As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE SMOKE DETECTOR IN THE M1 MID LAVATORY LEFT SIDE, HAD AN ALERT INFLIGHT AND REPEATED AFTER LANDING. NO EVIDENCE OF SMOKE. ACCOMPLISHED FIM 26-13-00-815-806. CLEANED THE SMOKE DETECTOR AS A PRECAUTION IAW AMM 26-13-01. OPS CHECKED GOOD.