What was found
BRAKES INEFFECTIVE, TOOK FAR MORE PRESSURE THAN NORMAL TO GET BRAKE RESPONSE. REMOVED FROM SERVICE. GVI OF BRAKES, NO DEFECTS, PERFORMED FUNCTIONAL TEST OF ANTI-SKID CONTROL SYSTEM (BUILT IN TEST), FUNCTIONAL TEST OF ANTI-SKID SYSTEM, NO DEFECTS, VISUAL INSPECT OF ALL FOUR WHEEL SPEED XDUCERS, NO DEFECTS, FUNCTIONAL TEST OF MAIN LANDING GEAR BRAKE SYSTEM, ALL FUNCTIONAL TESTS GOOD. BLED ALL BRAKES, PERFORMED GROUND TAXI OPS (20 KNOTS), BRAKES SEEM TO WORK NORMALLY WITH ANTI-SKID ON AND OFF. RETURNED TO SERVICE.