Airworthiness Directives: Stemme GmbH Gliders
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The FAA is adopting a new airworthiness directive (AD) for all Stemme GmbH (Stemme) TSA-M Model S6-RT and Stemme S 12 gliders. This AD was prompted by a report of a leaking electrical fuel transfer pump. This AD requires inspecting affected electrical fuel transfer pumps for certain non-conforming parts, and if found, replacing them with approved parts. This AD also prohibits installation of certain non-conforming parts on affected gliders. The FAA is issuing this AD to address the unsafe condition on these products.
This AD is effective July 24, 2026.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of July 24, 2026.
The FAA must receive comments on this AD by September 8, 2026.
A copy of the AD is available here:
Federal Register :: Airworthiness Directives; Stemme GmbH Gliders