What was found
SAL/GUA/LAX - FLT 510 - EN ROUTE, AFTER ONE HOUR AND FORTY MINTUES OF FLIGHT THE EICAS DISPLAYED THE FOLLOWING MESSAGES: PROBE HEAT, LND GEAR MONITOR, NOSE AIR/GND DISAGREE, GROUND SPOILERS. ALSO, THE FOLLOWING LIGHTS CAME ON AT THE UPPER PANEL: AUX PITOT, CAP PITOT, TAT. DUE TO THIS SITUATION, ACFT LANDED IN MEX. DURING GROUND INSPECTION, A BITE TEST WAS PERFORMED SO ALL FAULT MESSAGES WERE RESET PER MM 32-09-03 AND MM 30-31-00. THEREAFTER, AN ENGINE RUNNING WAS PERFORMED AND VERIFIED NORMAL SYSTEMS OPERATION. AIRPLANE RETURNED TO NORMAL OPERATION THROUGH LAX.