As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6427 - IAD-ROA - DURING TAXI, MADE AN SCHEDULED LANDING WITH ONE DISCREPANCY WHICH WAS LOSS OF BRAKE PSI. AIRCRAFT WENT TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED MAXERET, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)