As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NO AIII MESSAGE ON HEADINGS DURING APPROACH. DIVERTED AND ACCOMPLISHED UNEVENTFUL LANDING. INTERROGATED HEADINGS FAULT HISTORY NR 1 VHF NAV SHOWS INVALID FAULTS. R & R THE NR 1 VHF RECEIVER AS A PRECAUTIONARY MEASURE IAW MAINTENANCE 6345101. OPS CHECKS GOOD. ACFT IS CATEGORY III QUALIFIED COCKPIT PLACARD READS CAT III. DEFERRAL PLACARDS REMOVED. RETURNED TO SERVICE.