What was found
FLIGHT 2571 - YQB - FLIGHT CREW REPORTED HYDRAULIC SYSTEM NR 2 LOW QTY IND IN CRUISE. CREW PERFORMED AIR RETURN AND LANDED ACFT UNEVENTFULLY. EWR MX FOUND NR 1 HYD RESERVOIR TO BE LEAKING THROUGH RELIEF VALVE. MX REMOVED AND REPLACED NR 1 RESERVOIR AND PERFORMED OPERATIONAL CHECK HYD RESERVOIR NR 1 SUCCESSFULLY. DURING LEAK CHECK, IT WAS FOUND HYD SYSTEM NR 1 TO BE BLEEDING OVER TO HYD SYSTEM NR 2. MX INSPECTED AND FOUND NR 1 BRAKE SHUTTLE VALVE TO BE BAD. MX REMOVED AND REPLACED NR 1 BRAKE ASSY AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE. SDR C2XA10RI039=> RESERVOIR INFO. SDR C2XA10RI040=> BRAKE INFO.