As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTURE FROM BWI CREW NOTICED FIRST OFFICERS HORIZONTAL SITUATION INDICATOR WOULD NOT ROTATE. CREW DIVERTED TO WRI FOR AN UNEVENTFUL LANDING. MAINTENANCE REPLACED INSTRUMENT AMPLIFIER AND FIRST OFFICERS HORIZONTAL SITUATION INDICATOR IAW WITH THE AIRCRAFT MAINTENANCE MANUAL, PERFORMED A SUCCESSFUL OPERATIONAL CHECK AND RETURNED THE AIRCRAFT TO SERVICE.