As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED RECEIVING A EMERGENCY PARKING BRAKE ACCUMULATOR CAS MESSAGE. MAINTENANCE INSPECTED AND FOUND THE PILOT VALVE STUCK. MAINTENANCE THEN CLEANED AND LUBED THE PILOT VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.