Summary
The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus SAS Model A321-111, A321-112, A321-131, A321-211, A321- 212, A321-213, A321-231 and A321-232 airplanes. This proposed AD was prompted by a quality control review, which determined that the wrong aluminum alloy was used to manufacture several structural parts. This proposed AD would require a one-time eddy current conductivity measurement of certain structural parts of the outer flaps to determine if the incorrect alloy was used, and replacement if necessary, as specified in an European Aviation Safety Agency (EASA) AD, which will be incorporated by reference. The FAA is proposing this AD to address the unsafe condition on these products.