As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INITIAL TAXI OUT, PARK BRAKE LOW PRESS AMBER CAS ILLUMINATED. PARKING BRAKE WAS DISENGAGED PER THIS PHASE OF FLIGHT. STOPPED AIRCRAFT AND CYCLED THE PARK BRAKE, MESSAGE REAPPEARED. REPLACED BRAKE SWITCH. OPS CHECK GOOD. IAW AMM 32-44-15