Airworthiness Directives; Airbus Model A321 Series Airplanes

This amendment adopts a new airworthiness directive (AD) that is applicable to all Airbus Model A321 series airplanes. This action requires revising the Limitations section of the airplane flight manual to include an instruction to use Flap 3 for landing when performing an approach in conditions of moderate to severe icing, significant crosswind (i.e., crosswinds greater than 20 knots, gust included), or moderate to severe turbulence. This action is necessary to prevent roll oscillations during approach and landing in certain icing, crosswind, and turbulent conditions, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.