What was found
RUDDER JAMMED UPON ROTATION. (RUDDER SYS JAM) CHECKLIST. ALL KNOWN SYSTEMS SUSPECTED OF HAVING BRG ON RUDDER SYS. ALL OTHER FLIGHT CONTROL SYS OPERATED NORMALLY AND AC CONTROL WAS NEVER IN DOUBT. EMERG WAS DECLARED, 2 TOWER FLY-BYS WERE EXECUTED TO ALLOW TOWER TO VISUALLY INSPECT GEAR. AC WAS WITHIN LANDING WEIGHT, EMERG EQUIPMENT WAS IN PLACE, NORMAL LANDING WAS EXECUTED. RUDDER CONTROL SYSTEM (UNJAMMED) ON TOUCHDOWN. NOSEWHEEL STERRING SYS OPERATED NORMALLY AND AC WAS TAXIED BACK TO HANGER. A COMPLETE INSP OF RUDDER CONTROL SYS WAS ACCOMPLISHED. FOUND RUDDER GUSTLOCK ASSEMBLY CABLE FAIRLEAD BROKEN WITH VERY CONVINCING EVIDENCE VIA CABLE IMPRINT INTO PIECES THAT BROKEN FAIRLEAD JAMMED CABLE.