What was found
DURING TAXI THE CREW RECEIVED A EMERGENCY PARKING BRAKE ACCUMULATOR FAIL CAS MESSAGE. THE CREW REFERENCED THE QUICK REFERENCE HANDBOOK AND FOLLOWED THE PROCEDURES AND THE MESSAGE CLEARED. DURING FURTHER TAXI, THE CREW RECEIVED THE SAME MESSAGE AND CONTACTED MAINTENANCE CONTROL WHO CONFIRMED THE QUICK REFERENCE HANDBOOK PROCEDURE WAS COORECT. THE MESSAGE HAD CLEARED AND ASKED MAINTENANCE CONTROL FOR VERIFICATION TO DEPART. DURING CLIMBOUT THE CREW RECEIVED THE EMERGENCY PARKING BRAKE ACCUMULATOR FAIL MESSAGE AND WERE ADVISED TO RETURN TO PIT. MAINTENANCE INSPECTED AND REPLACED THE EMERGENCY PARKING BRAKE CHECK VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-00-00. OPERATIONAL CHECKS WERE PERFORMED A