Airworthiness Directives; Schempp-Hirth Flugzeugbau GmbH Sailplanes

We propose to adopt a new airworthiness directive (AD) for Schempp-Hirth Flugzeugbau GmbH Models Duo Discus and Duo Discus T powered sailplanes. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as excessive load on the air brake system. We are issuing this proposed AD to require actions to address the unsafe condition on these products.