What was found
AIRCRAFT WAS EN ROUTE TO PIT WHEN THE EMERGENCY PARKING BRAKE ACCUMULATOR CAS MESSAGE ILLUMINATED. THE FLIGHT CREW REFERENCED THE QRH AND ATTEMPTED TO CLEAR THE MESSAGE. THE WARNING DID NOT EXTINGUISH AND THE CREW DIVERTED TO CHO. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FERRIED THE AIRCRAFT TO PIT. REPLACED THE EMERGENCY PARKING BRAKE VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-43-00. FUNCTIONAL CHECKS WERE COMPLETED AND THE AIRCRAFT RETURNED TO SERVICE.