What was found
AFTER TAKEOFF FROM OMA, LANDING GEARS WOULD NOT RETRACT RESULTING IN AN AIR TURN BACK. FOUND 'B' HYD SYSTEM MODULE UNIT (HOUSING) FAILED AT THE NR 5 PUMP PRESSURE SUPPLY PORT. REMOVED AND REPLACED MODULE PER MM 29-12-31. OPS AND LEAK CHECK GOOD. ALSO, FOUND NR 2 ENGINE DRIVEN HYD PUMP LEAKING. REMOVED AND REPLACED PUMP PER MM 29-12-00. REMOVED AND REPLACED NR 1 ENGINE DRIVER HYD PUMP FOR PRECAUTIONARY MEASURE. OPS AND LEAK GOOD.