As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT NR 2085 - AFTER TAKEOFF ORD DURING CLIMB-OUT, LOST LEFT EFIS AIRSPEED INDICATION FOLLOWED BY NR 1 FLIGHT AUGMENTATION PANEL FAULTS. UNABLE TO RESET AND AIRCRAFT RETURNED TO ORD, LANDING WITHOUT INCIDENT. REPLACED NR 1 AIR DATA COMPUTER. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)