Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to all Fokker Model F27 Mark 100, 200, 300, 400, 500, 600, and 700 series airplanes, that currently requires supplemental structural inspections to detect fatigue cracks, and repair or replacement, as necessary, to ensure the continued airworthiness of these airplanes. This action would add or revise certain significant structural items for which inspection and repair or replacement is necessary. This proposal is prompted by a structural re- evaluation conducted by the manufacturer, which identified additional structural elements where fatigue damage is likely to occur. The actions specified by the proposed AD are intended to prevent reduced structural integrity of these airplanes.