As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 824 SDQ-JFK, CREW DECLARED EMERGENCY DUE TO ECAM MESSAGE "BRAKES" AUTO BRK FAULT "BRAKES RELEASED". THE TECHNICIAN FOUND NR 2 TACHOMETER DRIVE SHAFT SHEARED. REMOVED AND REPLACED TACH AND DRIVE SHAFT IAW AMM 32-42-57-04. OPS CHECK GOOD.