What was found
PILOT REPORTED: AT TAXI SPEED WHEN THE PLANE HITS A BUMP IN THE PAVEMENT, ALSO RANDOMLY WITHOUT PRESSURE CHANGES ON THE BRAKE PEDALS THE PLANE SEEMS TO REDUCE THE PRESSURE BEING DEMANDED AND FEELS LIKE IT IS ROLLING FREELY AS IF THE WHEEL LOCK PROTECTION IS COMING ON. WHEN IT RE-ENGAGES IT ENGAGES GRABBING THE BRAKES AND ACFT SHUTTERS. MX REMOVED AND REPLACED THE NR 2 & 3 WHEEL SPEED TRANSDUCERS AND BLED BRAKES WITH TAXI AND OPERATIONAL CHECKS GOOD. ACFT WAS APPROVED FOR RETURN TO SERVICE.