What was found
(CAN) AFTER GEAR UP SELECTION, THE GEAR DIDN`T RETRACT COMPLETELY. NOSE WHEEL REMAINED EXTENDED AND GEAR DOORS OPEN. NO PRESSURE IN NR 2 MAIN HYD SYS, INITIALLY FULL FLUID BUT RAPIDLY DECREASED TO ZERO. ACCELERATION ALTITUDE DRILLS COMPLETED - CLIMBED AT IAS 140. NOMINATED 2 CAUTION LIGHTS - NR 2 ENG HYD PUMP AND OTBD ROLL SPOILERS. RAN QRH FOR LANDING GEAR NOT EXTEND/RETRACT (COMPANY PROCEDURE) - NOT RELEVANT RAN QRH FOR NR 2 HYD SYS FAILURE. "PAN CALL" CONDUCTED & CONDUCTED MANUAL GEAR EXTENSION. CONDUCTED FROM QRH, GEAR DOWN/3 GREENS. UNEVENTFUL LANDING. ENGINEERING DESCRIPTION: DEFECT: "NO HYD FLUID NR 2 SYS ,NR 2 ENG HYD PUMP OUTBD ROLL SPOILERS GEAR SELECTED UP GEAR DIDN`T COME UP, NOSE WHEEL AND GEAR DOORS DOWN -NO PX IN NR 2 SYS BUT QTY OK-THEN QTY FELL TO ZERO AFTER ABOUT 1 MIN". RESOLUTION: NLG DRAG STRUT ACTUATOR FLEX HOSE FOUND TO BE LEAKING. FLEX HOSE REPLACED AND SYS CHECKS CARRIED AS REQUIRED BY THE AMM.NR 2 EDP. REPLACED FILTERS CHECKED/REPLACED NOTE : THIS HOSE ASSY DSC252B4-0124 HAS A COMPANY LIFE LIMIT OF 10,000 CYCLES, PLUS AN ADDITIONAL TASK CARD TO INSPECT ITS INSTALLATION/ROUTING TO IMPROVE ITS RELIABILITY. IN THIS CASE THE HOSE HAD DONE ONLY 9006 CYCLES. ON-GOING RELIABILITY MONITORING OF THIS HOSE ASSY CONTINUES.