The information in this document is intented to apply to commercial jet transport category airplanes that incorporate plastic (polycarbonate or acrylic) lenses on exterior light assemblies, or are being considered for such an application. Exterior lighting applications include position light assemblies, anticollision light asemblies, and landing light assemblies. However, much of the material provided herein is general in nature and is directly applicable to many aircraft categories including, but not limited to, helicopters, general aviation aircraft, and military aircraft.

Purpose:

The purpose of this document is to provide guidance pertaining to the use of plastic (polycarbonate or acrylic) lenses on commercial jet transport aircraft to aircraft designers, regulatory certification agents, and maintenance personnel. It is not intended to serve as design instructions for the creation of plastic or acrylic lenses. This document identifies significant performance aspects of plastic exterior light lenses that should be carefully managed for each lens application. Additionally, this document provides basic inspection and maintenance procedures for plastic exterior light lenses.