Airworthiness Directives; Burkhart Grob, Luft-und Raumfahrt, Model G 103 C Twin III SL Sailplanes

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This amendment adopts a new airworthiness directive (AD) that applies to Burkhart Grob, Luft-und Raumfahrt (Grob), Model G 103 C Twin III SL sailplanes. This action requires repetitively inspecting the propeller bearing and upper pulley wheel for increased play and, if increased play is found, modifying the propeller bearing and pulley wheel with a part of improved design. 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 prevent the loss of the sailplane engine propeller and possible loss of the sailplane.