As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 918 - LYH-IAD - DURING CRUISE, MADE AN SCHEDULED LANDING AT IAD WITH ONE DISCREPANCY WHICH WAS F/O'S ADI SHOWS 6 DEGREES NOSE DOWN ATTITUDE IN LEVEL FLIGHT. AIRCRAFT WENT OT THE GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED ADI, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)