Summary
This document revises an earlier proposed airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9 series airplanes, and Model MD-88 and MD-90-30 airplanes, that would have required replacement of the lanyard assembly pins of the evacuation slides with solid stainless steel pins. That proposal was prompted by a report that, due to stress corrosion on the lanyard pins, the arms of the lanyard assembly of the evacuation slide were found to be frozen. This new action revises the applicability of the proposed rule to include one additional airplane and remove another. The actions specified by this new proposed AD are intended to prevent the improper deployment of the evacuation slide due to stress corrosion, which could delay or impede evacuation of passengers during an emergency.