What was found
WHILE EXITING THE HIGH SPEED TAXIWAY AFTER LANDING, AT APPROXIMATELY 40 KNOTS, LIGHT BRAKES WERE APPLIED. PLANE DID NOT SLOW DOWN WITH INCREASED BRAKING, PLANE DID SLOW DOWN APPROXIMATELY 1 TO 2 SECONDS AFTER APPLYING INCREASED PRESSURE ON BRAKES. ACFT DECELERATED RAPIDLY. ACFT SLOWS NORMALLY AT LOW SPEEDS BUT WITH INCREASED EFFORT. FOUND NR 4 TIRE BRAKE PACK OUT OF LIMITS. R & R BRAKE PACK IAW AMM 32-42-40 AND BLED BRAKES. NO LEAKS NOTED. TAXI CHECKED BRAKING, OPS CHECKED GOOD.