What was found
5578- STL- FO HORIZONTAL SITUATION INDICATOR WENT BLANK DURING TAXI. MAINTENANCE REMOVED AND REPLACED THE FO ELECTRONIC FLIGHT INSTRUMENT SYSTEM INDICATOR.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
5578- STL- FO HORIZONTAL SITUATION INDICATOR WENT BLANK DURING TAXI. MAINTENANCE REMOVED AND REPLACED THE FO ELECTRONIC FLIGHT INSTRUMENT SYSTEM INDICATOR.