As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW RECEIVED A FIRST OFFICER WINDSHIELD HEAT FAIL CAS MESSAGE. THE CREW THEN FOLLOWED THE QUICK REFERENCE HANDBOOK AND CALLED MAINTENANCE CONTROL. FLIGHT 4056 WAS THEN INSTRUCTED TO RETURN TO CAK. MAINTENANCE INSPECTED AND REPLACED THE FIRST OFFICER'S WINDSHIELD HEAT CONTROLLER IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 30-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.