Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 737-300, - 400, and -500 series airplanes. This proposal would require inspections to detect bent or damaged tie links and washers of the elevator feel and centering unit, and replacement of the centering unit with a new or serviceable unit, if necessary. This action also would provide an optional replacement of the centering unit, which, if accomplished with the installation of supports and a stop bolt, would constitute terminating action for the repetitive inspections. This proposal is prompted by a report of high control column forces that occurred during takeoff and landing. The actions specified by the proposed AD are intended to prevent such high forces, which could result in restriction of elevator control during takeoff, climbout, and landing.