As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE FROM PDX TO TOL, DURING CLIMB OUT THE FLIGHT CREW NOTICED THE MAIN HYDRAULIC QUANTITY SYSTEM DECLINING. THE FLIGHT CREW FOLLOWED COMPANY PROCEDURES AND RETURN TO PDX FOR AN UNEVENTFUL LANDING. MAINTENANCE INSPECTED AND LOCATED A RUPTURED HYDRAULIC LINE AT THE THRUST REVERSER PUMP. MAINTENANCE REPLACED THE LINE AND PERFORMED A SUCCESSFUL OPERATIONAL CHECK IN ACCORDANCE WITH THE MAINTENANCE MANUAL. THE AIRCRAFT WAS RETURNED TO SERVICE.