What was found
(CAN) WHEN LANDING THE BRAKES HAD ALMOST NO EFFECT, ONLY AT VERY SLOW SPEEDS DID THE BRAKES SEEM TO WORK A LITTLE AND ONLY WITH VERY HARD APPLICATION ON THE BRAKE PEDALS. RESULT WAS A VERY LONG LANDING, BUT WITH PLENTY TO SPARE. INVESTIGATION/ACTION, HYD SYSTEM NR 1 BLED IAW AMM 29-10-00. BRAKE TEST PERFORMED. THESE ACTIONS DID NOT SOLVE THE PROBLEM. THE PROBLEM HAVE RE-OCCURRED. THIS TIME BOTH HYD SYSTEM 1 AND 2 WERE BLED. ALL BRAKES BLED AND THEN TAXI AND BRAKE TEST PERFORMED W/O SUCCESS. DURING A MORE THOROUGH INSPECTION OF WHEEL SPEED TRANSDUCERS, A MECHANICAL RESISTANCE WAS NOTED ON WHEEL SPEED TRANSDUCERS POS 2,3 AND 4. WHEEL SPEED TRANSDUCERS REPLACED ACC AMM 32-46-11.