As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, CREW OBSERVED "ANTI-SKID INOP" ANNUNCIATION. EXPERIENCED LOSS OF NORMAL BRAKING. MANAGED TO STOP ACFT USING PNEUMATIC EMERGENCY BRAKE. MX PERSONNEL TRAVELED TO LOCATION AND AFTER TROUBLESHOOTING FOUND FAULT WITH ANTI-SKID DIGITAL CONTROL BOX. CONTROL BOX REPLACED, BRAKES BLED, PNEUMATIC STORAGE BOTTLE SERVICED AND SYS OPS CHECKED SATISFACTORY. CREW PERFORMED GROUND TAXI TESTS WITH NO FAULTS NOTED. ACFT RETURNED TO SERVICE.