What was found
ORD - FLT 702 - DURING CLIMB-OUT AT 500 FT, STAB TRIM NR 1/2 ILLUMINATED ON MFDU AND WOULD NOT RESET. CREW ACCOMPLISHED JAMMED PROCEDURE CHECKLIST AND RETURNED AND LANDED ORD WITHOUT FURTHER INCIDENT. MAINTENANCE TROUBLE SHOT SYSTEM AND FOUND NO FAULTS. A LAND 40 TEST WAS ACCOMPLISHED WITH NO FAULTS DETECTED. UNABLE TO DUPLICATE STAB TRIM 1/2 FAULT AND AS A PRECAUTIONARY. REPLACED FLIGHT AUGMENTATION COMPUTER. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)