What was found
RANDOM AND QUICK FLASHING OF MASTER WARNING LIGHT, WITH ASSOCIATED "PITCH TRIM" AND "ELEVATOR FEEL" CAUTION LIGHTS. 2 ADDITIONAL CAUTION LIGHTS ALSO ILLUMINATED BUT COULD NOT BE DEFINATIVELY IDENTIFIED-POSSIBLY THE "RUD CNTRL" AND "PUSHER SYSTEM FAIL." THERE WERE ADDITIONAL MOMENTARY CAUTION LIGHT ILLUMINATIONS FROM THE MIDDLE OF THE PANEL, BUT NO DEFEINATIVE IDENTIFICATIONS. RETURNED TO FIELD. LANDING UNEVENTFUL. NR 2 ADC REPLACED AND SB84-34-140RT C/W. ALL OPS CHECKS GOOD. PITOT STATIC LEAK CHECK GOOD. NO FURTHER DEFECTS NOTED. ACFT REMAINS CAT I QUALIFIED. RETURNED TO SERVICE.