Airworthiness Directives; Raytheon Aircraft Company 58, 60, 90, 100, 200, and 300 Series and Model 2000 Airplanes

Resumo

This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Raytheon Aircraft Company (Raytheon) 58, 60, 90, 100, 200, and 300 series and Model 2000 airplanes. The proposed action would require replacing certain AlliedSignal Aerospace outflow/safety valves in the pressurization system with new or serviceable valves. The proposed AD results from a report of cracking and consequent failure of the affected outflow safety valves in the pressurization system. Investigation has revealed problems during the manufacturing process of certain Allied Signal outflow/safety valves. The actions specified by the proposed AD are intended to prevent outflow/safety valve cracking and consequent failure, which could result in rapid decompression of the airplane.