As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3207 THE CREW REPORTED AFTER TAKEOFF RECEIVED A LAV SMOKE WARNING. THE AIRCRAFT RETURNED TO MDT AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND PERFORMED OPERATIONAL CHECKS OF THE LAV SMOKE SYSTEM. NO DEFECTS WERE FOUND. THE AIRCRAFT WAS RELEASED FOR SERVICE.