What was found
NORMAL BRAKES FAILED TO ENGAGE TO STOP AIRCRAFT ON TAXI-IN,AIRCRAFT SKIDDED ABRUPTLY WHILE APPLYING NORMAL BRAKE BRESSURE,THEN CONTINUED TO ROLL FOR APPROX 3 TO 4 FT UNTILL EMERGENCY BRAKE APPLIED. - TROUBLESHOT BRAKES AND ANTI-SKID SYSTEM, BLED BRAKES AND REPLACE BRAKES PCB. SYSTEM OPS CHECKED GOOD IAW MM CHAPTER 32.