Airworthiness Directives; Boeing Model 737-100, -200, -300, -400, and -500 Series Airplanes

This amendment supersedes an existing airworthiness directive (AD), applicable to all Boeing Model 737-100, -200, -300, -400, and - 500 series airplanes, that currently requires a one-time inspection to determine if certain ailerons are installed on the airplane. That amendment also requires removing any defective aileron, and replacing it with a new or serviceable aileron. This amendment continues to require those actions and limits the applicability of the rule. This amendment is prompted by additional information that specifies the identification of certain part numbers. The actions specified in this AD are intended to detect and correct defective ailerons, which could result in in-flight separation of an aileron from the airplane and consequent reduced controllability of the airplane.