Airworthiness Directive · Amendment 39-18121 · Flight controls
Stemme AG Gliders
This AD applies to Stemme AG TSA-M Models S6 and S6-RT gliders, all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for Stemme AG TSA-M Models S6 and S6-RT gliders. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as a bending defect of the fork head installed in the aileron, speed brake, and flap control systems. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, before further flight, after March 24, 2015 (the effective date of this AD), modify the affected flight control systems, or take other actions, following a method approved specifically for this AD by the FAA, Small Airplane Directorate. Contact Stemme AG to obtain FAA-approved repair instructions approved specifically for compliance with this AD and incorporate those instructions. You can find contact information for Stemme AG in paragraph (i)(2) of this AD.
Note 1 to paragraph (f) of this AD: At the time of issuance of this AD, no design solution is available to restore the airworthiness of the respective type designs to a level corresponding to their approved type design specifications.
