What was found
DURING CLIMB, APPROXIMATELY 5 MINUTES AFTER LAST USE OF HYD SYSTEM, THE HYD LOW LEVEL ILLUMINATED. ON POST FLIGHT INSPECTION, HYD LEVEL APPROX 1 1/2 ABOVE EMPTY LINE. REMOVED AND REPLACED THE LT ENGINE DRIVEN HYDRAULIC PUMP IAW MM 29-11-03. OPS AND LEAK CHECKED GOOD.