As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR DATA SYSTEM NR 2, ERROR 320 PLUS FEET COMPARED TO NR 1, 3, AND STANDBY. STARTED AROUND 20,000 FEET IN CLIMB. REPLACED ALL FOUR PITOT STATIC PROBES WITH NEW UNITS. THE SYSTEM WAS RECERTIFIED AND AN OPS CHECK FLIGHT WAS PERFORMED WITH POSITIVE RESULTS. NO FURTHER DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.