As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AIRSPEED DISAGREE ANNUNCIATION AT ROTATE, DETERMINED CAPTAINS AIRSPEED WAS ERRONEOUS, SPLIT 10-20 KNOTS BETWEEN INDICATIONS; AIRCRAFT DIVERTED TO AND LANDED SAFELY AT IAD. REMOVED AND INSTALLED NEW CAPTAIN PITOT PROBE, PER AMM 34-11-01-400-801. ACCOMPLISHED LEAK TEST GOOD, PER AMM 34-11-00-790-810.