What was found
ON TAKEOFF ROLL, CAPT AIRSPEED ALIVE BY 70 KNTS, FIRST OFFICER 0 KTS. ABORT AT 78 KTS IN ACCORDANCE WITH TRANSCONTINENTAL PROCEDURE. NORMAL TAXI IN. REMOVED PITOT LINE FROM AIRSPEED INDICATOR, CAPPED PITOT LINE AT MACH SPEED SWITCH. PRESSURIZED F/O'S PITOT FROM COCKPIT TO PITOT TUBE. REMOVED OBSTRUCTION FROM F/O'S PITOT SYSTEM. RECONNECTED LINE AT MACH SPEED SWITCH AND AT AIRSPEED INDICATOR. PERFORMED PITOT STATIC TEST IAW B727 MM 36-11-0 AND FAR PART 43 APPENDIX E. ALL SYSTEMS FUNCTIONALLY CHECK NORMAL.