Summary
This document revises an earlier proposed airworthiness directive (AD), applicable to de Havilland Model DHC-8-100 and -300 series airplanes. That proposal would have superseded a previously- issued AD that currently requires repetitive inspections to detect cracks of the upper drag strut trunnion fittings of the nose landing gear and to verify tightness of the fitting attachment bolts. It also would have required the installation of a modification to terminate the repetitive inspections. This new action revises the proposed rule by proposing to require a different terminating modification. This action is prompted by data indicating that the previously proposed terminating modification is not effective. The actions specified by the proposed AD are intended to prevent failure of the upper drag strut trunnion fittings of the nose landing gear, which could lead to collapse of the nose landing gear.