Airworthiness Directives; Airbus Airplanes

We propose to adopt a new airworthiness directive (AD) for all Airbus Model A321 series airplanes. This proposed AD was prompted by a full scale fatigue test campaign on these airplanes in the context of the extended service goal. This proposed AD would require inspections of the affected frame locations, and repair if necessary. We are proposing this AD to address the unsafe condition on these products.