Airworthiness Directives; Burkhardt Grob Luft-Und Raumfahrt GmbH & CO KG Model G103 TWIN ASTIR Sailplanes

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The FAA proposes to adopt a new airworthiness directive (AD) for all Burkhardt Grob Luft-Und Raumfahrt GmbH & CO KG (Grob) Model G103 TWIN ASTIR sailplanes. This proposed AD would require you to replace the elevator lever, part number (P/N) 103-3521, with a part of improved design, P/N 103-3523. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. We are issuing this proposed AD to prevent cracks in the elevator lever, which could cause the elevator lever to fail. This failure could result in loss of control of the sailplane.