Summary
The FAA is revising an earlier NPRM for an airworthiness directive (AD) that applies to certain Boeing Model 767 series airplanes. The original NPRM would have superseded an existing AD that currently requires a one-time inspection for missing, damaged, or incorrectly installed parts in the separation link assembly on the deployment bar of the emergency escape system on the entry or service door, and installation of new parts if necessary. The original NPRM proposed to require replacing the separation link assembly on the applicable entry and service doors with an improved separation link assembly, and related investigative and corrective actions if necessary. The original NPRM also removed certain airplanes from the applicability. The original NPRM resulted from reports that entry and service doors did not open fully during deployment of emergency escape slides, and additional reports of missing snap rings. This action revises the original NPRM by adding a new inspection fordiscrepancies of the unloaded spring dimensions in the separation link assembly, and corrective actions if necessary. We are proposing this supplemental NPRM to prevent failure of an entry or service door to open fully in the event of an emergency evacuation, which could impede exit from the airplane. This condition could result in injury to passengers or crewmembers.