As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROXIMATELY 1 HOUR AFTER DEPARTURE, THE AMBER ANTI-SKID FAIL MSG CAME ON. AFTER CONSULTING THE CHECKLIST, THE CREW ELECTED TO RETURN TO BASE. IT WAS DETERMINED TO BE AN ANTI-SKID CONTROL BOX ASSEMBLY THAT IS THE LIKELY CAUSE. A REPLACEMENT UNIT HAS BEEN ORDERED. THE ITEM HAS BEEN DEFERRED IAW MEL PROCEDURES. A SUPPLEMENTAL REPORT WILL BE FILED WHEN THE BOX IS REPLACED.