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 SMOKE ALARM AND ELECTRONIC CENTRALIZED AIRCRAFT MONITOR ALERT EVENT LASTED 2-3 SECONDS (AT FORWARD LAVATORY) FLIGHT ATTENDANT CONFIRMED NO SMOKE OR TAMPER EVIDENT. PERFORMED OPERATIONS TEST OF LAVATORY SMOKE DETECTION SYSTEM. TEST PASSED. NO FAULTS FOUND PER AMM 26-17-00.