Airworthiness Directives; Airbus SAS Airplanes

The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A319 series airplanes; Model A320 series airplanes; and Model A321-111, -112, -131, -211, -212, -213, -231, -232, -251N, - 252N, -253N, -271N, -272N, -251NX, -252NX, -253NX, -271NX, and -272NX airplanes. This AD was prompted by aeroelastic stability assessments that indicate that reduced stability margins may exist due to accumulation of additional mass from rudder repainting or repairs. This AD requires airframe vibration troubleshooting after an airframe vibration event, reporting results, and applicable on-condition actions. The FAA is issuing this AD to address the unsafe condition on these products.