As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6150 - IAD-EWR - DURING TAKEOFF, BOTH TIMES RETURNED TO IAD DUE TO NR 2 ALTIMETER FLAGGED AND NR 2 EADI SHOWED FLAG. AIRCRAFT RETURNED TO GATE AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE RERACKED BOTH AHARS COMPUTERS AND REPLACED ADC. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)