Summary
The FAA proposes to supersede Airworthiness Directive (AD) 2019-21-10, which applies to all Airbus SAS Model A321-111, -112, -131, -211, -212, -213, -231, and -232 airplanes. AD 2019-21-10 requires 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. Since the FAA issued AD 2019-21-10, the design approval holder (DAH) has issued an updated list of suspected parts, including those that may have been improperly heat treated, and the FAA has determined that more airplanes are affected by the unsafe condition. This proposed AD would continue to 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, and would also require a new one-time eddy current conductivity measurement of certain other structural parts of the outer flaps to determine ifthe parts were properly heat treated, and replacement if necessary, and would include additional affected airplanes, as specified in a European Union 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.