Airworthiness Directives; Airbus SAS Airplanes

The FAA is adopting a new airworthiness directive (AD) for certain Airbus SAS Model A320-251N and -271N airplanes; and Model A321- 251N, -253N, -271N, and -272N airplanes. This AD was prompted by a report that during a calibration check, some torqueing tools used on the final assembly line have been found out of tolerance. This AD requires retorqueing each affected connection of sense and fire extinguishing lines within the pylon area to a correct torque value, as specified in an European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.