What was found
MQY - A 3 INCH CRACK WAS FOUND DURING INSPECTION OF THE RUDDER QUADRANT STRUCTURE P/N 137390C415. THE CRACK WAS IN THE EDGE MEMBER P/N 137390C120 WHICH SECURES THE SKINS AND BULKHEADS TOGETHER. THE CRACK IS CAUSED BY THE P/N 137370E6 D-WASHER (PACKER) WHICH IS CHAFING AGAINST THE RADIUS OF THE EDGE MEMBER P/N 137390C120. THE D-WASHER IS USED TO ASSIST IN ATTACHING THE RUDDER ARTIFICAL FEEL BUNGEES. THE EDGE MEMBER WAS REPLACED AND THE D-WASHER WAS RE-WORKED TO ENSURE A CORRECT FIT IN RELATION TO THE EDGE MEMBER RADIUS. THE AIRCRAFT RETURNED TO SERVICE. PART TC: 16,556.(X)