What was found
IN CRUISE, IN AND OUT OF CLOUDS ENROUTE, THE FOLLOWING EVENTS OCCURRED: MACH TRIM FAILURE, AUTOPILOT DISENGAGES, YAW DAMPER DISENGAGES, NO AIRSPEED INDICATION ON NR 1, COMPARATOR MONITOR ILLUMINATED, NR AIRSPEED INDICATOR ROLLED BACK, NO AIRSPEED INDICATION ON STANDBY, STALL IDENT 3 ILLUMINATED. PILOTS CONFIRMED PITOT PROBE HEAT SWITCH ARE ON. PILOTS TURNED ON IGN/ENGINE ANTI-ICE AND TKS SYSTEMS. WITHIN MINUTES, THE SYSTEMS RETURNED TO NORMAL AND FLIGHT CONTINUED.