As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT THE NAVIGATION SYSTEM FMS NO2 WAS UNABLE TO SYNC WITH THE FMS NO1. ARINC/WAAS TEST FAIL. THE MAINTENANCE TEAM TROUBLESHOT AND DETERMINED THAT THE #2 FMS WAS DEFECTIVE. A MODIFIED UNIVERSAL AVIONICS UNS1EW FMS WAS INSTALLED INTO THE NO2 POSITION. FUNCTIONAL CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.