What was found
WHILE EN ROUTE TO CUU FROM DFW, THE AIRCRAFT HAD A PROXIMITY SYSTEM FAILURE. THE CREW RETURNED TO DFW AND MADE AN EMERGENCY LANDING DUE TO ALL THE FAILED SYSTEM INDICATIONS. THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. THE AIRCRAFT WAS INSPECTED FOR FERRY FLIGHT AND FERRIED TO HOT-MAINTENANCE. THE PSEU WAS REPLACED AND RETRACTION CHECKS PERFORMED. OPS CHECKED GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.