Airworthiness Directives; Airbus Airplanes

We propose to adopt a new airworthiness directive (AD) for all Airbus Model A318, A319, and A320 series airplanes. This proposed AD was prompted by a cracked upper cardan in the main landing gear (MLG). This proposed AD would require revising the maintenance or inspection program, as applicable, to reduce the life limits for the MLG upper cardan for certain installations. We are proposing this AD to prevent failure of the upper cardan in the MLG, which could result in MLG collapse and subsequent damage to the airplane and injury to occupants.