As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT SIDE BRAKES WOULD ENGAGE ON LANDING BUT THEN STOPPED WORKING FOR 1-2 SECONDS AROUND 60 KTS AND 15-20 KTS. R & R BRAKE CONTROL VALVE. LEAK CHECKED GOOD BUT LH BRAKES STILL FAILED DURING TAXI CHECK. R&R BRAKE CONTROL UNIT WITH MODIFIED UNIT. LEAK CHECKED GOOD. OPS/TAXI CHECKS GOOD.