As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENG START RECEIVED ANTISKID EICAS MSG AND NORM ANTISKID STATUS MESSAGE. QRH PROCEDURE COMPLIED WITH.AC RETURNED TO THE GATE (BTB) AND MTX GROUNDED AC, MTX TROUBLE SHOT AND REMOVED AND REPLACED PARK BRAKE, CLOSE RELAY K419 IAW WDG 32-44-11 OPS CHECK GOOD. RETURNED A/C TO SERVICE