What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED ON ARRIVAL INTO SCHEDULED DESTINATION OF MIA: FLIGHT CREW REPORTED THAT DURING TAKEOFF ROLL, BRAKES RELEASED ECAM ANNUNCIATED STATUS PAGE INDICATE CAT 3 DUAL INOPERATIVE , AUTO BRAKE INOPERATIVE, CAT 3 SINGLE. WHEEL PAGE SHOWS BRAKE 3 RELEASE. ECAM PROCEDURES COMPLIED WITH. THE AIRCRAFT LANDED SAFELY AT MIA WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED #3 MAIN LANDING GEAR BRAKE FAN ASSEMBLY PER AMM 32-48-51 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.