What was found
IN DESCENT THROUGH 18,000 FLAP/ADV SWS LIGHT ILLUMINATED AS WELL AS CONTROL FAULT INBOARD FLAP LIGHTS (2ND FROM TOP) FLASHING (QRH PROCEDURE UNSUCCESSFUL). CAPT AUTOPILOT DISCONNECTED. TRY TO RE-ENGAGE AND AC PITCHED NOSE DOWN AT RAPID RATE. REMOVED AND REPLACED THE FLAP CONTROL COMPUTER IAW MM 27-50-06. OPERATED THE FLAPS, COULD NOT DUPLICATE THE PROBLEM AFTER FECU REPLACMENT OPS CHECKS GOOD. P/N ON 307500-1007, S/N ON 0102, S/N OFF 0193. OPERATED THE NR 1 AUOTPILOT SYSTEM IAW MM 22-10-00. COULD NOT DUPLICATE THE PROBLEM. NO PITCH TENDANCIES NOTED AT THIS TIME.