As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL AN AIRSPEED DISCREPANCY WAS NOTED AT 100 KTS, INDICATED ON CAPTAINS & STANDBY AIRSPEED INDICATORS. THE FIRST OFFICER AIRSPEED WAS LAGGING SIGNIFICANTLY. AIR RETURNED, AFTER ACCOMPLISHING ALL RELEVANT CHECKLIST. R & R FIRST OFFICERS PITOT PROBE IAW AMM 34-11-01-024- 041. FIRST OFFICERS PITOT PROBE LEAK CHECKED IAW AMM 34-11-00-501, NO LEAKS FOUND.