What was found
DURING DESCENT GREEN SYSTEM LEVEL LOW LIGHT ILLUMINATED, PERFORMED CHECK LIST AND PERFORMED ABNORMAL CHECK LIST DUE TO LOSS OF SYSTEM HYDRAULICS. BOTH HYDRAULIC PUMPS WERE PLACED TO DUMP PRIOR TO TOTAL FLUID LOSS. AIRCRAFT LANDED NORMAL. AFTER LANDING NOSE STEERING WOULD NOT RESPOND DUE TO HYDRAULIC LOSS. DETERMINED FLUID LOSE DUE TO NR 1 GREEN ELECTRIC PUMP CASE LEAK. REMOVED AND REPLACED PUMP. LEAK AND OP'S CHECK NORMAL IAW MM 29-21-11. AIRCRAFT RETURNED TO SERVICE.