What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED INBOUND INTO MIA DUE TO THE FLIGHT CREW REPORTING THAT AFTER TAKEOFF AND GEAR RETRACTION THEY RECEIVED ECAM CAUTION MESSAGES:WHEEL - NOSE WHEEL STEERING FAULT AND BRAKES SYSTEM 2 FAULT. THE CREW ACCOMPLISHED A SYSTEM RESET PER THE QRH AND BOTH FAULTS CLEARED. 5 MINUTES LATER THEY RECIEVED THE SAME FAULT MESSAGES WITH THE EXCEPTION THAT THIS TIME IT WAS A BRAKE SYSTEM 1 FAULT. THE FLIGHT CREW DIDI NOT ATTEMPT A SECOND RESET. THE AIRCRAFT LANDED SAFELY AT MIA AND WAS TOWED TO THE GATE. MAINTENANCE ACCOMPLISHED FAILURE OF THE BSCU SYSTEM 2 IDENTIFIED BY THE AFS TSM 32-42-00-810-864, SYSTEM RESET OK WITH NO FAULTS NOTED.