As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI THE LEFT MAIN LANDING GEAR BRAKES HAD NO EFFECT IN STOPPING THE AIRCRAFT. REPLACED INBOARD BRAKE CONTROL VALVE, PERFORMED PRESSURE CHECK AND ADJUSTMENT OF BRAKE CONTROL VALVE, OPS CHECKED GOOD AND NO LEAKS NOTED IAW DC-8 MM.