As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 5112 - AFTER DEPARTING CLT, CAPTAIN'S HSI SHOWED 3 FLAGS ON NAVIGATIONAL HEADING AND VERTICAL. FIRST OFFICER'S NAV WAS SHOWING 30 DEGREES OFF. CAPTAIN RETURNED TO CLT. INSPECTED WIRING, INSPECTED ELECTRICAL CONNECTIONS. REMOVED AND REPLACED HSI. GROUND OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE. (X)