What was found
EMERGENCY DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. DURING APPROACH WITH LG SELECTED DOWN LT OTBD ANTI-SKID LIGHT ILLUMINATED. AFTER GO AROUND LIGHT ILLUMINATED AGAIN. QRH PROCEDURE FOLLOWED. FLAPS 40 LANDING. PERFORMED ANTI-SKID SYS TROUBLESHOOTING IAW AMM 32-43-00. SYS FAILED FOR ANTI-SKID CONTROL BOX. R & R ANTI-SKID CONTROL BOX IAW AMM 32-43-04. PERFORMED OPERATIONAL CHECK OF DUAL SERVO VLVS IAW AMM 32-43-03. SYS CHECKED NORMAL.