As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/DAY - FLT 6290 - DURING CLIMB AT 1815 HRS ON 3-29-97, MADE AN UNSCHEDULED LANDING AT IAD DUE TO NR 2 DADC FAILED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSP AND REMOVED AND REPLACED NR 2 DADC; OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)