What was found
THE CREW RECEIVED A HYDRAULIC 2 LO PRESSURE CAUTION. AFTER PERFORMING THE CHECKLIST, THEY RECEIVED A HYDRAULIC ENGINE DRIVEN PUMP 2A CAUTION MESSAGE, AND AFTER A FEW MINUTES, THE HYDRAULIC 2 LOW PRESSURE CAUTION RETURNED. THE HYDRAULIC SHUT OFF VALVE WAS SHUT OFF IAW THE CHECKLIST. MAINTENANCE INSPECTED THE AIRCRAFT AND REPLACED THE ENGINE PUMP PRESS LINE FROM THE AFT PRESSURE BULKHEAD TO THE NR 1 STS PRESS MANIFOLD. THE OPERATIONAL AND LEAK CHECK WERE GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.