Airworthiness Directives; Stemme GmbH & Co. KG Models S10, S10-V, and S10-VT Sailplanes

This amendment adopts a new airworthiness directive (AD) that applies to certain Stemme GmbH & Co. KG (Stemme) Models S10, S10-V, and S10-VT sailplanes. This AD requires inspecting certain areas in the flight control system for cracks; immediately replacing any cracked parts; and eventually replacing all longitudinal coupling with modified coupling regardless if found cracked. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified by this AD are intended to detect and correct cracks in certain areas of the flight control system, which could result in flight control system failure with consequent reduced or loss of control of the sailplane.