As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6387 - IAD-SYR - DURING CLIMB, MADE AN UNSCHEDULED LANDING DUE TO CAPTAINS ADI TUMBLED DURING CLIMB-OUT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE REMOVED AND REPLACED CAPTAINS ADI, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)