As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE ALARMS IN BOTH MID LAVS ACTIVATED AT CRUISE NO SMOKE PRESENT. CORRECTIVE ACTION: INDUCED SMOKE ON AFT, FWD MID LAVS RED LIGHTS ALARM CAME ON. RESET BOTH LAV SMOKE DETECTORS SUCCESSFUL. FOUND CALL LIGHT NOT WORKING WHEN SMOKE WAS INDUCED TO SMOKE ALARMS AND CONNECTOR ON AFT MID LAV CONNECTOR P20 FOUND LOOSE. REPLACED BOTH DETECTORS. SYSTEM OPERATION IS NORMAL.