As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, LOW BRAKE PRESSURE AND ANTI-SKID INOPERATIVE ANNUNCIATORS ILLUMINATED AND CREW LOST BRAKE PEDAL PRESSURE. STOPPED ACFT ON TAXIWAY VIA EMERGENCY BRAKES. POWER BRAKE CIRCUIT BREAKER WAS PULLED AND RESET AND BOTH AND ANNUNCIATORS EXTINGUISHED. LOW BRAKE PRESSURE AND ANTI-SKID INOPERATIVE ANNUCIATORS AGAIN ILLUMINATED SHORTLY AFTER. REMOVED LOW PRESSURE SWITCH. INSTALLED NEW SWITCH. REMOVED HIGH PRESSURE SWITCH. INSTALLED O/H SWITCH. BLED BRAKE SYS. LEAK CHECKED GOOD. TAXI CHECKED GOOD. WORK PERFORMED IAW MM 32-44-20.