What was found
A MECHANIC WAS COMPLETING OUR COMPANY REQUIRED FINAL INSPECTION PRIOR TO RELEASING THE AIRCRAFT BACK TO SERVICE. ONE OF THOSE INSPECTION ITEMS, WAS TO CHECK THE FLIGHT CONTROLS. WHEN HE APPLIED PRESSURE TO THE RUDDER PEDALS HE HEARD A LOUD POP AND THE RUDDER PEDALS DID NOT SEEM TO MOVE AS HE EXPECTED. THEN LOOKED AT THE RUDDER BAR ASSEMBLY AND FOUND THAT THE TUBING WAS CRACKED ON BOTH SIDES OF THE CENTER POINT AT THE WELDS. WHEN THE RUDDER BAR ASSEMBLY WAS REMOVED AND EXAMINED, THE CRACKS WERE ALL THE WAY AROUND THE TUBE. 47.2 HOURS SINCE THE LAST 100 HR INSPECTION 188 LANDING SINCE LAST INSPECTION. TIME ON PART IS UNKNOWN.