As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, AND DURING ANTI SKID TEST, FOUND PARKING BRAKE LIGHT EXTINGUSHED ON CENTER CONSOLE WITH PARKING BRAKE SET. A/C RETURNED TO BLOCKS (BTB). MAINTENANCE REMOVED AND REPLACED BRAKE CONTROL VALVE IAW AMM 32-44-04. OPS AND LEAK CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.