As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT, RH HYD QUANTITY WENT TO RF ON STATUS PAGE AFTER ENGINE START. AIRCRAFT RETURNED TO BLOCKS. MAINTENANCE REMOVED AND REPLACED RH ANTI-SKID MODULE IAW B76Y7 AMM 32-42-02. OPS AND LEAK CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.