What was found
APPROX 1 SECOND AFTER ADVANCING POWER FOR TAKEOFF RECIEVED LEVEL 1 TIRE DIFF PRESS ALERT. REJECTED TAKEOFF. ALERT CLEARED ITSELF SHORTLY THEREAFTER, ALTHOUGH NR 3 TIRE PRESSURE CONTINUED TO FLUXUATE. ALL TIRE PRESSURES REMAINED IN LIMMITS FOR SECOND TAKEOFF. ATTEMPT. BRAKE TEMP MONITORING, TIRE PRESS IND ICATING SYS INOP. ALL TIRE PRESSURES ARE REQD TO BE CHECKED BEFORE THE FIRST FLIGHT OF EACH DAY. REMOVED & REPLACED BTM TPI IAW AMM 32-46-02-4. OPS CHECK GOOD. ALL WHEEL PRESSURE AND BRAKE TEMP SHOWING GOOD. OK FOR SERVICE.