What was found
CREW REPORTED, LOOSING BOTH ENGINE DRIVEN HYDRAULIC PUMPS WHILE EN ROUTE. THE NR 1 AND NR 2 HYDRAULIC PUMP LOW PRESSURE LIGHTS ILLUMINATED. WHILE TRYING TO ISOLATE PROBLEM THE SYSTEM CAME BACK ON LINE. THE AIRCRAFT WAS DIVERTED TO CLE WHERE IT LANDED WITHOUT INCIDENT. BOTH HYDRAULIC PUMPS WERE INSPECTED AND FOUND GOOD. THE HYDRAULIC POWER CONTROL PANEL WAS REMOVED AND REPLACED IAW MM 29-11. IN ADDITION, THE BUS PROTECTION PANEL WAS REPLACED AS A PRECAUTIONARY MEASURE, OPERATIONAL CHECKS WERE GOOD.