As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, FLIGHT DECLARED EMERGENCY DUE TO A BRAKE SYSTEM 1 FAULT ECAM MESSAGE. LANDED WITHOUT INCIDENT AND TAXIED TO GATE UNDER OWN POWER. MAINTENANCE REPLACED BSCU NR 1 IAW AMM 32-42-34. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.