As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON DESCENT, CAPTAINÏ¿½S AND FIRST OFFICERÏ¿½S AIRSPEED DID NOT MATCH. ALSO LOST FLIGHT DIRECTORS. EMERGENCY DECLARED; FLIGHT DIVERTED TO JFK LANDING SAFELY. MAINTENANCE REPLACED LEFT AIR DATA INERTIAL REFERENCE UNIT (ADIRU) PER AMM 34-21-01.