As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS NOT GROUNDED. MOMENTARY FALSE AURAL AND VISUAL SMOKE WARNING IN FORWARD LAVATORY. NO EVIDENCE OF SMOKE OR SMOKE SOURCE DETECTED. ACCOMPLISHED FIRST CLASS LAVATORY SMOKE DETECTION SELF TEST-ALL TESTS PASS PER AMM 26-14-00.