AD 2021-22-04 Prompted By A Quality Control Review, Which Determined That The Wrong Aluminum Alloy Was Used
The FAA is superseding Airworthiness Directive (AD) 2019-21-10, which applied to all Airbus SAS Model A321-111, -112, -131, -211, -212, -213, -231, and -232 airplanes. AD 2019-21-10 required 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. This AD continues 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 also requires a new one-time eddy current conductivity measurement of certain oth