As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/DTW - FLT 6454 - DURING TAKEOFF AT 1720 HRS ON 4-15-97, ABORTED TAKEOFF DUE TO FO'S ADI ROLL AND PITCH COMPARATIVE FLAG. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED AHRS, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)