As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6544 - ROA-IAD - DURING TAXI, AIRCRAFT WENT TO GATE AFTER LANDING AT IAD WITH ONE DISCREPANCY WHICH WAS CAPTAINS BRAKES WORKED FOR FIRST APPLICATION BUT THEN WENT INOP WITH PRESSURE APPLIED. MAINTENANCE INSPECTED AND REMOVED AND REPLACED BOTH NR 2 AND NR 4 WHEEL SPEED TRANSDUCERS DUE TO HIGH RESISTANCE. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)