What was found
ON INSTALLATION OF VERTICAL STAB TIP FAIRING, FOUND A CRACK ON RT SIDE, EMINATING FROM A RADIUS OF UPPER SKIN. REMOVED FITTING ON RT STAB FAIRING BY ACCESS TO CRACK. NDT VERIFIED END OF CRACK, CHECK STOP DRILL, AND OPEN HOLES. FABRICATED, PRIMERED, TREATED, AND INSTALLED REPAIR DOUBLER AND SHIMS. ACCOMPLISHED WITH ER/A 509299-14, REV.