As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED INBOUND INTO MIA DUE TO THE LEFT BRAKE PRESSURE ON TRIPLE INDICATOR READS APPROX 500 PSI INFLIGHT. THE AIRCRAFT LANDED SAFELY AT MIA WITHOUT FURTHER INCIDENT. MAINTENANCE ACCOMPLISHED BSCU 1 LRU AND BRAKE SYSTEM TEST PASSES PER AMM 32-46-00. NO FAULTS NOTED ON ECAM. NO HISTORY AND LEAK NOTED. MAINTENANCE ACCOMPLISHED TSM 32-42-00. BRAKE SYSTEM OPERATIONAL CHECKS NORMAL.