As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6342 - IAD-EWR - DURING CLIMB, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO NR 2 AHRS FAILED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED NR 2 AHRS, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURNED TO SERVICE. (M)