As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A LOSS OF FMS AND NAV2. DECLARED AN EMERGENCY AND RETURNED TO THE FIELD. MAINTENANCE INSPECTED AND REPLACED NR 2 VHF RECEIVER AND PERFORMED AN OPERATIONAL CHECK OF NR 1 NAV RECEIVER IAW 34-51-00. THERE HAVE BEEN NO REPEATS SINCE MAINTENANCE WAS PERFORMED.