What was found
(CAN) THE FLIGHT CREW REJECTED TAKEOFF AT 30 KNOTS WHEN THEY LOST NR 1 HYDRAULIC SYSTEM PRESSURE, THE RUD ISO CAUTION LIGHT ALSO ILLUMINATED. THE NR 1 HYDRAULIC RESERVOIR QTY WAS NEAR ZERO. MAINTENANCE INVESTIGATION FOUND THE RT INBD ROLL SPOILER ACTUATOR HOUSING FRACTURED AND LEAKING. THE RT INBD ROLL SPOILER ACTUATOR WAS REPLACED AND THE ACFT RETURNED TO SERVICE. ROLL SPOILER ACTUATOR, PN A44700-009, ACTUATOR TSN/TSO/TSR 57067, CSN/CSO/CSR 63012. ACFT TSN 51302, CSN 66045.