Airworthiness Directives; Airbus Model A300 B2 and B4 Series Airplane, and Model A300 B4-600, B4-600R, and F4-600R (Collectively Called A300-600) Series Airplanes

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Airbus Model A300 B2 and B4 series airplanes, and certain Model A300 B4-600, B4-60-R, and F4-600R (collectively called A300-600) series airplanes, that currently requires a one-time inspection to detect cracks in gear rib 5 (let and right) of the main landing gear (MLG) attachment fittings at the lower flange and vertical web, and repair if necessary. This amendment revises the applicability by including additional airplanes. The actions specified in this AD are intended to detect and correct fatigue cracking of the MLG attachment fittings, which could result in reduced structural integrity of the airplane.