As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKE OFF ROLL, FIRST OFFICER'S AIRSPEED INDICATOR VERY SLOW TO RESPOND. CAPTAIN'S AIRSPEED INDICATOR AT 80 KTS; FIRST OFFICER'S JUST STARTING TO COME ALIVE. REJECTED TAKE OFF AT 100 KTS. FLIGHT CREW ADVISED BRAKE TEMPERATURE NOT OVER 440 DEGREES. NO BRAKE OVER HEAT. AIRCRAFT WAS GROUNDED. MAINTENANCE PERFORMED FUNCTIONAL TEST OF THE AIRSPEED DATA IAW AMM 34-13-00. REPLACED ADIRU NR 2 IAW AMM 34-12-34 AND PERFORMED SATISFACTORY LAND CAT 3 CAPABILITY TEST IAW AMM 22-97-00.