A need to rewrite the takeoff and landing acceptable means of compliance (AMC/AC 27&29) for multiengine rotorcrafts

Abstract

The current certification requirements for multiengine rotorcrafts (CS and FAR 27&29) for takeoff and landing performance and handling qualities do not always provide a safe approach to the applicable scenarios where the helicopters do actually operates if compliance demonstration is achieved with the current acceptable means of compliance. Several critical aspects of the acceptable means of compliance do not produce “safe” flight envelopes and provide insufficient or inadequate operational information to allow safe operations in all typical helicopter environments. The aim of airworthiness certification specification is to guarantee safety standards within a reasonable economic situation constrain that would justify this business. The current acceptable means of compliance are long dated and rarely updated in order to reflect the advance in technology and the need to provide a much higher confidence to helicopter end users.