As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 5495 - STL - HEADING 2 FAIL WITH INDICATION BEING 100 DEGREES OFF FROM THE NR 1 HEADING. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE RT FLUX VALVE BRACKET TO BE BROKEN. BRACKET WAS REMOVED AND REPLACED AND FLUX VALVE COMPENSATION WAS PERFORMED. SYSTEM OPS CHECKED GOOD.