As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAE - FL 1515 - FLIGHT DIVERTED TO CAE DUE TO A NAVIGATION PROBLEM. THE NR 2 NAV SHOWS OFF FLAGS ON THE HSI BUT WORKS FINE ON THE RMI. THE NR 2 HSI FUNCTIONS NORMALLY IN THE NAV MODE. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NR 2 VOR/ILS NAV RECEIVER. OPS CHECK GOOD. (M)