What was found
(CAN) R HYD PRESS LOW AMBER. PILOT CALLED TO REPORT THE R HYD PRESS LOW AMBER CAS MESSAGE POSTED AFTER BEING AIRBORNE FOR OVER 4 HOURS. THE RH PRESSURE SHOWED 1400 PSI AND THE RH QUANTITY WAS ZERO. THE QRH WAS FOLOWED. THE FLIGHT WAS AN HOUR OUT OF AND DIVERTED. THE LINE THAT WAS THE CULPRIT IS 125 (1005354281-005) VIEW W. THE ADEL CLAMP IS 511 (M85052-2-4). THE INSULATION TO THE CLAMP WAS DETERIORATED CAUSING THE LINE TO VIBRATE AND MAKE A HOLE.