As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED CAPTAIN’S PRIMARY FLIGHT DISPLAY (PFD) LOST AIRSPEED, ALTITUDE AND NAVIGATION DATA IN FLIGHT. MACH TRIM ALSO DISCONNECTED AND AUTOPILOT DISENGAGED. CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT. R & R NR 1 AIR DATA COMPUTER (ADC) AND PERFORMED CHECKS IAW AMM. ACFT RELEASED FOR SERVICE.