The volume of electrical wiring in aircraft has increased significantly since the beginning of commercial aviation. This extensive network is known as the Electrical Wiring Interconnection System (EWIS).EWIS is essential for safe aircraft operations, as it enables both electrical power distribution and information transfer between the various aircraft systems. When not detected, a damaged EWIS component can cause loss of signal, short circuits, arcing, overheat, fumes and flames.This article explains why it is important to regularly check EWIS components. It also recalls the typical damage that EWIS can sustain with its associated risks, and provides guidance and recommendations to prevent them.
