What was found
1) REJECTED TAKE OFF DUE TO FIRST OFFICER'S AIRSPEED INDICATED 40 KNOTS SLOWER THAN CAPTAINS. EMERGENCY CHECK LIST COMPLETED.2) REMOVED AND REPLACED F/O'S AIRSPEED INDICATOR PER M/M 34-12-21 INSPECTED PITOT STATIC SYSTEM, FOUND F/O PITOT TUBE PLUGGED, REMOVED DEBRIS AND CLEANED PITOT TUBE. PERFORMED PITOT STATIC SYSTEM TEST PER M/M 34-11-00. PERFORMED AIRSPEED INDICATORS TEST PER M/M 34-12-12. OPS CHECKED GOOD. A/C OK TO CONTINUE.3) CREW REJECTED TAKEOFF AT 105 KTS. INDICATED ON CAPT.'S INDICATOR, AMBIENT AIR TEMP 28 C., PRESS. ALT. 1400', A/C WEIGHT 131.5K, REPORTED FULL REVERSE THRUST USED WITH MODERATE BRAKING. 4) REVIEWED AOM & BMM BRAKE COOLING CHARTS. PER M/M REQUIRES 20 MIN. GROUND TIME FOR