What was found
DURING A 500 HR INSP OF THE AIRFRAME THE FUSELAGE AFT FRAME USED FOR TAILBOOM ATTACHMENT WAS INSPECTED. THE TAILBOOM WAS REMOVED BECAUSE OF A SUSPECTED CRACK WHICH WAS FURTHER INSPECTED USING THE DYE PENETRANT INSP METHOD. A CRACK WAS VERIFIED TO HAVE A LENGTH OF APPROX 32MM. THE CRACK IS LOCATED AT APPROX STA 5062.7 MM, WL 1651 MM, RT BL 292 MM. A REPAIR FOR THIS LOCATION IS IN THE MM CHAPTER 53.10.22.772 REPAIRING THE AFT FRAME. THIS REPAIR CONSISTS OF ADDING 4 EACH DOUBLERS TO THE INSIDE OF THE FUSELAGE AFT FRAME.