What was found
CREW REPORTED AIRSPEED MISCOMPARES, ALTITUDE MISCOMPARES, STICK PUSHER FALL CAS MESSAGES IN FLIGHT. AIRSPEED INDICATIONS VARIED ACROSS ADC 1,2, AND 3 BY 20-30 KNOTS. ALTITUDE VARIED BY 200-300 FT, AUTOPILOT SYSTEM BECAME INOPERATIVE AFTER CAS MESSAGES, ACFT DEPARTED, FLIGHT CONDITIONS WERE DAY VMC. (K)