As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6356 - IAD-CMH - DURING TAKEOFF, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO NR 2 SYMBOL GENERATOR FAILED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED SYMBOL. GENERATOR, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)