Airworthiness Directives; Eurocopter France Model EC 155B and B1 Helicopters

摘要

This document proposes adopting a new airworthiness directive (AD) for Eurocopter France (ECF) Model EC 155B and B1 helicopters. This proposal would require inspecting an electrical cable bundle for wear. If wear is present, the AD would require installing an airworthy cable bundle and modifying the routing of the electrical cable bundles. This proposal is prompted by reports of a short circuit in the wiring, which led to failure of the normal and emergency landing gear operation modes. The actions specified by this proposed AD are intended to prevent interference of the wiring with the structure resulting in an electrical short circuit, failure of the landing gear to extend, and an emergency landing.