As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK, ON CLIMBOUT NR 1 AUTOPILOT DISCONNECTED, N1 BUGS DECREASED TO 0. BOTH FMCS LOST ALL DATA. NO TEMP INFO. GROUND PROX INOP LIGHT ILLUMINATED. FOUND DADC-1 & TAT PROBE FAULTY. REMOVED AND REPLACED DADC NR 1 COMPUTER AND TAT PROBE PER MM.