What was found
ON TAKEOFF ROLL AT 70 KNOTS, F/O'S AIRSPEED INDICATOR FAILED TO DISPLAY. VISUALLY INSPECTED PITOT TUBES AND STATIC PORTS FOR MOISTURE, DEBRIS, OR ANY BLOCKAGE, NONE FOUND. COMPLETED AIRSPEED CALIBRATION TESTS OF BOTH AIR DATA COMPUTERS AND THE SECONDARY FLIGHT DISPLAY, ALL RESULTS WITHIN SPECIFIED TOLERANCES. ALL WORK COMPLETED IAW CESSNA CITATION 560XL MAINTENANCE MANUAL CHAPTER 34-11-08.