What was found
AFTER TAKEOFF WITH GEAR UP DURING FLAP RETRACTION, HYD SYSTEM-A BEGAN DECREASING TOWARD ZERO. RAN CHECK LIST AND LEAK DIDN'T STOP. INSTALLED NEW OUTBD FLAP HYD PUMP PER M/M 27-51-062-4. REPLACED NR 1 AND NR 2 ENG CASE DRAIN FILTERS PER M/M 29-11-041-2, NO CONTAMINATION IN FILTER. SERVICED A-SYSTEM HYDRAULICS PER M/M 12-12-000-2 AND OPS CHECKED ALL FLIGHT CONTROLS WITH NO LEAKS NOTED. GROUND RAN NR 1 AND NR 2 ENGINES PER JRH AND ALL OPS NORMAL. OFF MFG MS9-3911-30ZE-4C, ON MFG MS9-3911-30ZE4C.