Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes

This amendment revises an existing airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-80 series airplanes and Model MD-88 airplanes, that currently requires visual/dye penetrant and ultrasonic inspections to detect cracks in the vertical leg of the rear spar lower cap of the wings, and various follow-on actions. This amendment is prompted by the necessity to provide the current address of the FAA office that receives the results of reporting requirements of this AD. The actions specified in this AD are intended to prevent fatigue cracking in the vertical leg of the rear spar lower cap of the wing, which, if not detected and corrected in a timely manner, could result in loss of the spar cap, and consequent damage to the spar cap web and adjacent wing skin structure; this condition could lead to reduced structural integrity of the wing.