As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH INTO CVG, THE LOCALIZER INDICATED RED X'S ON PFD 1, 2 & STANDBY. THE AIRCRAFT RETURNED TO SDF AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE VOR/LOC ANTENNA COUPLER-DIVIDER PER EMB 145 AMM 34-32-12, OPS CHECK GOOD. MAINTENANCE ALSO REPLACED BOTH VOR ANTENNAS DUE TO EROSION.