What was found
ORD - FLT 1155 - AFTER T/O, JUST AFTER SLAT RETRACTION, A/C LOST YAW DAMPER OPERATION AND SIMULTANEOUS COMPUTER FAILURE WITH ALTITUDE IND STUCK AT FL 130, AIRSPEED IND STUCK AT 250 KTS AND FLT GUIDANCE COMPUTER C/B TRIPPED. A/C RETURNED AND LANDED W/O INCIDENT. GRD CHK OF FLT GUIDANCE SYS WAS UNABLE TO DUPLICATE PROBLEM. CHK'D WIRING IN AFT TAIL COMPART WITH NO DEFECTS NOTED. PRECAUTIONARY REPLACED NR 1 AND NR 2 DFGC'S NR 1 AND NR 2 AUTOPILOTS GRD CHK'D NORM OPERATION AND NR 1 AND NR 2 DFGC'S GROUND CHK'D NORM OPERATION. SUBSEQUENTLY, ON FLT 0578 DURING DESCENT IN DCA, PROB REPEATED. A/C LANDED DCA W/O INCIDENT. REPAIRED WIRE 2C610U2ORD BTWN P10-1206 AND S30-5 POST NR 10, WDM REF 22-16-11. OPS CHK OK.(M)