What was found
CLE TO CLT FLIGHT CREW REPORTED A NR 1 HYDRAULIC SYSTEM OVERTEMP CONDITION IN FLIGHT. AS PER CFM, SHUTDOWN HYDRAULIC PUMPS AND WAITED 15 MINUTES FOR OVERTEMP CONDITION TO COOL. ATTEMPTED TO TURN NR 1 HYDRAULICS ON. NEITHER ENGINE DRIVEN NOR ELECTRIC PUMPS WERE PRODUCING PRESSURE. CREW DECLARED AN EMERGENCY AND CONTINUED INTO CLT. WHILE DESCENDING THROUGH 10,000 FT THE CREW REPORTED THAT HYDRAULIC PRESSURE RETURNED AND LANDED WITH NO FURTHER PROBLEMS. MAINTENANCE FOUND THE NR 1 HYDRAULIC PRESSURE FILTER DP INDICATOR POPPED. MX REPLACED PRESSURE FILTER P/N 318298-5 AND NR 1 ENGINE DRIVEN HYDRAULIC PUMP. THE FDR AND CVR REMOVED FOR QUARANTINE.