Summary
This document revises an earlier proposed airworthiness directive (AD), applicable to all Model A300 B2, A300 B4, A300 B4-600, and A300 B4-600R series airplanes, that would have required repetitive inspections for cracking of certain fittings, corrective action if necessary, and, for certain airplanes, a modification; and would have provided for optional terminating action for the repetitive inspections. This new action revises the proposed rule by including additional airplanes in the applicability. The actions specified by this new proposed AD are intended to detect and correct propagation of cracks on the frame 40 aft fittings due to local stress concentrations at the upper flange runout of frame 40, which could result in reduced structural integrity of the airplane. This action is intended to address the identified unsafe condition.