Summary
We propose to adopt a new airworthiness directive (AD) for Burkhart GROB Luft-und Raumfahrt GmbH Models GROB G 109 and GROB G 109B 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 corrosion and/or cracking of the elevator control rod that could lead to failure of the elevator control rod with consequent loss of control. We are issuing this proposed AD to require actions to address the unsafe condition on these products.