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Hello Herks Hydro Expertise! Retraction cycle Timing of Right landing ( B model aircraft) is exceeded from prescribe given time sec ie ,38 seconds with UT hydraulic system but when retracting the landing gear with AUX hydraulic system on ground timing is with in limit ie 17 second . We have replaced right side of landing gear, the flow regulator, controllable restrictor valve, one way restrictor, hydraulic motor ,gear box,landing brake lock and HI.Torque two speed valve but defect was repeated again and again in every sortie. any expert opinion Best Regards Munir Abbasi Home Hercules Pakistan