Airworthiness Directives; Airbus Model A319-100 Series Airplanes; Model A320-111 Series Airplanes; Model A320-200 Series Airplanes; and Model A321-100 and -200 Series Airplanes

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The FAA is adopting a new airworthiness directive (AD) for certain Airbus airplane models, as specified above. This AD requires modifying the parking brake system to automatically restore the normal brake if the parking brake pressure decreases below a certain threshold. This AD results from a report of failure of the parking brake while the airplane was on the holding point of the runway before takeoff, leading to a runway departure. We are issuing this AD to ensure normal braking is available to prevent possible runway departure in the event of failure of the parking brake.