Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model MD-11 series airplanes. This proposal would require a one-time visual inspection of the 90 percent brake pedal position switch to determine if certain date codes are present; and corrective action, if necessary. This proposal is prompted by reports indicating that the threaded insert connectors pulled free from the casing of the 90 percent brake pedal position switch, which allowed the insert connector contact to burn through the nose wheel steering cable. The actions specified by the proposed AD are intended to prevent the threaded insert connector from pulling free from the casing of the 90 percent brake pedal position switch and burning through the nose wheel steering cable, which could result in reduced aircraft directional control while on the ground.