What was found
THE PILOT WAS UNABLE TO NORMALLY EXTEND THE LANDING. EMERGENCY GEAR EXTENSION PROCEDURES WERE SUCCESSFUL. SUBSEQUENT INSPECTION REVEALED THAT THE RIGHT GEAR EXTENSION PRESSURE LINE HAD DEVELOPED A .5 INCH CRACK JUST PRIOR TO THE LANDING GEAR UPLOCK ACTUATOR. THE AIRCRAFT LOST HYDRAULIC FLUID. THE CRACK IN A LOCATION WERE THE LINE MADE A 180 DEGREE BEND. THE CRACK APPEARS TO BE CAUSED BY FATIGUE. THE LINE WAS THE ORIGINAL LINE AND WAS 21 YEARS. THE LINE WAS REPLACED. (M)