Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to all Airbus Model A300 B2, B4-100, and B4-200 series airplanes, that currently requires supplemental structural inspections to detect fatigue cracking, and repair of cracked structure. This action would require revising the supplemental structural inspection program, including changing some of the inspection techniques, changing some of the thresholds and intervals for inspections, expanding the area to be inspected for some of the inspections, and revising the Fleet Leader Program. This proposal is prompted by a review of in-service history and reports received from the current supplemental structural inspections program required by the existing AD. The actions specified by the proposed AD are intended to prevent reduced structural integrity of these airplanes due to fatigue cracking.