What was found
(CAN) RUDDER DUAL PRESSURE REGULATOR, SYS NR 2, HYDRAULICS, PRESSURE TUBE ASSY RUPTURED PRIOR TO FLIGHT. WHEN PREFORMING RUDDER ACTUATOR TEST, NR 1 RUD SHUTOFF PRESSED, SYSTEM DEACTIVATED, RUD FULL PRESSURE LIGHT DID NOT COME ON. NR 2 RUD SHUT OFF PRESSED, SYSTEM DEACTIVATED, 2 ENG HYD LIGHT ANNUNCIATED FALLOWED BY A COMPLETE LOSS OF NR 2 HYD SYSTEM FLUID AND SUBSEQUENT LOSS OF NR 2 RUDDER CONTROL.