AD FAA-2017-0709

We are adopting a new airworthiness directive (AD) for certain Airbus Model A318 series airplanes; Model A319 series airplanes; and Model A320-211, -212, -214, -216, -231, -232, and -233 airplanes. This AD was prompted by a report indicating that the lower rib foot angle of the center wing box did not match with the bottom skin panel inner surface. This AD requires repetitive inspections for cracking of the external bottom skin in certain areas on the left and right wings, and corrective actions if necessary. We are issuing this AD to address the unsafe condition on these products.