Summary
We propose to adopt a new airworthiness directive (AD) for certain Airbus Model A318, A319, A320 and A321 series airplanes. This AD requires revising the maintenance or inspection program to incorporate new or more restrictive airworthiness limitations. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the principal structural elements and certain life-limited parts are subject to widespread fatigue damage (WFD). We are proposing this AD to address the unsafe condition on these products.