What was found
DURING MAINTENANCE INSPECTION, SHOP FOUND A LIGHTNING ST88IKE DAMAGE ON SKIN, AT A BUTT JOINT AT THE NOTED AREA. SHOP PERFORMED 0.4"X1.0" SIZE BLEND OUT ON THE DAMAGED AREA. AFTER NDT INSPECTIONS, IT WAS FOUND THAT THE MINIMUM THICKNESS IS 0.54", AND THE NOMINAL THICKNESS IS 0.064" – 15.625% DECREASE. THE BLEND OUT IS BEYOND LIMITS OF B767-300 SRM 53-00-01 AND NO SRM REPAIR WAS FOUND.