As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT THE FLIGHT CREW RECEIVED AN EICAS MESSAGE FOR LOW EMERGENCY PARKING BRAKE ACCUMULATOR PRESSURE. AFTER CONFERRING WITH MAINTENANCE THE FLIGHT CREW RETURNED TO THE FIELD. THE LANDING WAS MADE WITHOUT INCIDENT. MAINTENANCE REPLACED THE EMERGENCY PARKING BRAKE VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-43-02. FUNCTIONAL CHECKS WERE COMPLETED AND THE AIRCRAFT RETURNED TO SERVICE.