Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 757-200 and -300 series airplanes. This proposal would require inspection of the guide arm assembly on passenger door number 1 for a part mark to determine whether the guide arm assembly contains an adjuster rod which was incorrectly manufactured and replacement of any such adjuster rod. This action is necessary to prevent failure of the adjuster rod in the passenger door guide arm assembly, which could prevent the door from opening or closing during normal or emergency operations, resulting in inability to evacuate the crew and passengers in an emergency. This action is intended to address the identified unsafe condition.