What was found
RECEIVED A LEVEL 2 "ANTI SKID FAIL" ALERT FOLLOWING LANDING GEAR EXTENSION. EXECUTED A GO AROUND & COMPLIED WITH QRH. GOT GOOD ANTI-SKID TEST .ON LANDING ROLLOUT THE LEFT BRAKES WERE SENSITIVE & APPEARED TO HAVE LOCKED UP MOMENTARILY. AFTER BLOCK-IN, LEFT BRAKES (NR 1, 2, 5, 6) WAS 292 DEG, 236 DEG, 282 DEG, 279 DEG, RT SIDE IN 170'S INTERROGATED MCDU AND FOUND ASCU FAULTED ON LAST 3FLT LEGS. SUSPECT BAD ASCU.