As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW NOTED NR1 HYD SYS LOSS OF HYD PRESSURE AND QTY AT CRUISE 30 MIN INTO FLIGHT. UNEVENTFUL LANDING. TROUBLESHOOTING FOUND ADEL CLAMP TO HAVE WORN RUBBER WHICH ALLOWED CLAMP TO CHAFE THROUGH HYD PRESSURE LINE FROM ENG DRIVEN HYD PUMP WHERE IT ENTERS THE HYD NR1 MANIFOLD IN THE AFT EQUIP BAY.