As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6325 - DTW-IAD - DURING CRUISE, MADE AN SCHEDULED LANDING AT IAD WITH ONE DISCREPANCY WHICH WAS NR 1 AHRS FAILED ADN NR 2 ADC FAILED. AIRCRAFT WENT TO GATE AT IAD WITH NO FURTHER PROBLEMS. MX INSPECTED AND REMOVED AND REPLACED NR 1 AHRS AND NR 2 ADC, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. REFERENCE VTZA97328.