As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. CLIMBING THROUGH FL225, ALTITUDE DISAGREE ILLUMINATED WITH BOTH SIDES IN ICING CONDITIONS (-3 DEGREES C). FLIGHT DECLARED EMERGENCY AND DIVERTED TO JFK, LANDED WITHOUT INCIDENT. REPLACED LT ANGLE OF ATTACK SENSOR WITH NEW, IAW AMM 34-21-05. OPERATIONS CHECK GOOD.