What was found
NR 3 MAIN WHEEL MISSING , NO DAMAGE FOUND ON MLG OR FUSELAGE DURING TRANSIT CHECK. A/C APPROCHED AND LANDED WITH NORMAL CONFIGURATION, MAIN WHEEL FOUND ADJACENT TO TAXI WAY & "ANTI-SKID FAULT" MESSAGE SHOWED IAW PILOT REPORT. CARRIED OUT MAIN WHEEL CHECK IAW BOEING'S RECOMMENDATION, ALSO REPLACE NR 3 & 4 WHEEL AND SHAFT, CHECKED NORMAL. RECHECKED ORIGINAL NR 3 WHEEL, NO DAMAGE EXCEPT RETAINER PIN WAS MISSING.