Summary
We propose to adopt a new airworthiness directive (AD) for all Airbus Model A319, A320, and A321 series airplanes. This proposed AD is intended to complete certain mandated programs intended to support the airplane reaching its limit of validity (LOV) of the engineering data that support the established structural maintenance program. This proposed AD would require reinforcing the forward pressure bulkhead at a certain stringer on both the left-hand and right-hand sides, and related investigative and corrective actions if necessary. We are proposing this AD to prevent fatigue cracking of the forward pressure bulkhead, which could result in reduced structural integrity of the airplane.