Airworthiness Directives; Airbus SAS Airplanes

The FAA is adopting a new airworthiness directive (AD) for certain Airbus SAS Model A320-214 and -271N airplanes and Model A321- 211 and -231 airplanes. This AD was prompted by a test of a new wall partition for a certain cabin attendant seat model that revealed the backrest was permanently deformed and did not allow the seat pan to return to a full-up position; investigation results identified that a heat treatment had not been applied on certain backframes. This AD requires modifying the affected cabin attendant seats, as specified in a European Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.