As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 463 - CLIMB-OUT FROM CLT, AT FL 230, OFF FLAGS APPEARED ON CAPTAIN''S AIRSPEED INDICATOR AND ALTIMETER. CREW WAS UNABLE TO ENGAGE A-SYSTEM AUTOPILOT. FLIGHT RETURNED TO FIELD AT CLT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE NR 1 AIR DATA COMPUTER. OPERATIONAL CHECK GOOD. (X)