Summary
This document revises a previously proposed airworthiness directive (AD) applicable to certain Airbus Model A300 B2 and B4 series airplanes and Model A300 B4-601, B4-603, B4-620, B4-605R, B4-622R, and F4-605R airplanes. The previously proposed AD would have revised an existing AD to remove one model from the applicability. That AD currently requires a one-time inspection for cracking of the gantry lower flanges in the main landing gear (MLG) bay area; and repair, if necessary. This new action, which proposes to supersede the existing AD, would remove the one model from the applicability. For certain airplanes, it would retain the one-time inspection for cracking of the gantry lower flanges and repair, if necessary. For other airplanes, this new action would add repetitive inspections of the gantry lower flanges; repair, if necessary; and reinforcement of the left-hand and right-hand gantry. The actions specified by this new proposed AD are intended to detect and correct cracking of the gantry lower flanges in the MLG bay area, which could result in decompression of the airplane.