As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL F/O'S AIRSPEED INDICATION WAS LOW AND 40KTS LOWER THAN CAPT. NO BETTER AT 75KTS. T/O ABORTED. FOUND F/O'S PITOT PROBE OBSTRUCTED. PERFORMED TASK 34-10-00-00-170-001, FLUSHING OF TOTAL PRESSURE LINE. RECONNECTED PITOT LINE. PERFORMED LEAK CHECK OF SYSTEM IAW AMM 34-13-00-790-002. FOUND WITHIN MM LIMITS.