What was found
ELP - FLT 17945 - TAKEOFF ABORTED, NO EMERGENCY PROCEDURES NECESSARY. THIS IS A REPEAT INSTANCE OF PREVIOUS DIFFICULTY REPORTED ON MISR Y2PA-96-052, DATED 7-30-96. REPLACED COPILOT'S AIRSPEED INDICATOR. CHECKED SYSTEM PER FALCON MM 34-10-1. ALSO CHECKED MACH OVERSPEED WARNING SYSTEM IAW FALCON MM 34-10-4 WITH NO DEFECTS NOTED. ACFT ATTEMPTED DEPARTURE ON 8-1-96 AND REPORTED COPILOT'S AIRSPEED INDICATOR STUCK AT VARIOUS AIRSPEEDS. PROVIDED ERRONEOUS INDICATIONS. ACFT RETURNED TO ELP. NO EMERGENCY PROCEDURES NECESSARY. MAINTENANCE FOUND A RESTRICTION IN THE COPILOT'S PITOT TUBE. RESTRICTION WAS BLOWN OUT WITH NITROGEN. TESTED PITOT SYSTEM IAW FALCON MM 34-10-1 AND C/W PITOT/STATIC LEAK TEST IAW FAR 91-