As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKE OFF ROLL AT 50 KT, BRAKES RELEASE ILLUMINATED ON ECAM. REJECTED TAKE OFF. IN THE STATUS PAGE AUTOBRAKE WAS INOPERATIVE. IN ACCORDANCE WITH TSM 32-42-00-810-815-A THE BSCU TEST SHOW TACHOMETER 4 (22GG). IN ACCORDANCE WITH AMM 32-42-57 PB 401 CONF 00 THE TACHOMETER 4 WAS REPLACED AND THE BSCU TEST WAS SATISFACTORY, THE FAULT NOT DUPLICATED