As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL F/O AIRSPEED LAGGED BADLY. INFLIGHT A/S CAME BACK TO MATCH CAPT, THEN SHOWED FAST. EVENTUALLY STABILIZED ABOUT 5KTS FAST ON FINAL. FLUSHED F/O'S PITOT SYSTEM USING AMM 34-11-00-3-0 AND REMOVED AND REPLACED RIGHT HAND ADC PER MM 34-12-01-4-0 OPS AND LEAK CHECKED OKAY. PERFORMED F/O ADJUSTMENT AND TEST USING 34-11-00-5-0 AIRCRAFT OKAY FOR SERVICE.