As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - NR 1 BRAKE APPEARS TO BE INOP. TROUBLESHOT TO FAULTY NR 1 WHEELSPEED TRANSDUCER. REMOVED AND REPLACED NR 1 WHEELSPEED TRANSDUCER IAW CRJ-700 AMM TASKS 32-44-01-000-801-A01 AND 32-44-01-400-801-A01. OP CHECK OF ANT-SKID CONTROL UNIT PASSED. TAXIED AIRCRAFT TO CHECK BRAKES. BRAKES OPERATE NORMALLY. NO OTHER DEFECTS NOTED. RETURNED TO SERVICE.