What was found
D-CHECK, DURING MAINTENANCE INSPECTION. NR 4 PYLON LT SIDE, BULKHEAD STRAPS WERE FOUND CRACKED AT NAC STA 286.0 AND WL 146.5. THE AFT END OF THE STRAP CRACK WAS STOPPED DRILLED AND HFEC INSPECTED TO ENSURE CRACK CONTAINMENT. THE SKIN ACCESS CUT OUT EDGE CHAFING DAMAGE WAS REMOVED BY BLENDING. REPAIR DOUBLERS WAS FABRICATED FROM 0.063 INCH THICK TITANIUM SHEET WERE INSTALLED COMMON TO THE STRUT OUTER SKIN ASSY USING MECHANICAL FASTENERS.