Summary
We propose to adopt a new airworthiness directive (AD) for certain Airbus Model A318 and A319 series airplanes; Model A320-211, - 212, -214, -231, -232, and -233 airplanes; and Model A321-111, -112, - 131, -211, -212, -213, -231, and -232 airplanes. This proposed AD was prompted by reports of a vertical strut penetrating through the cabin floor during an emergency water landing and on airframe ground contact at certain speeds/accelerations. This proposed AD would require modification of the fuselage structure at frame (FR) 65. We are proposing this AD to address the unsafe condition on these products.