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 RT SIDE HSI WAS FAILING DURING FLIGHT. TROUBLESHOOTING IDENTIFIED THAT THE RT SIDE SYMBOL GEN WAS DEFECTIVE, SN 96051282 & WAS REPLACED WITH A REPAIRED UNIT. FUNCTIONAL CHECKS WERE SATISFACTORY & THE ACFT WAS RETURNED TO SERVICE.