AD 2026-15-04: Stemme GmbH Gliders

What the FAA requires

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.

Read the full directive on the Federal Register →

Applicability

This AD applies to all Stemme GmbH TSA-M Model S6-RT and Stemme S 12 gliders, certificated in any category. (d) Subject Joint Aircraft System Component (JASC) Code 2800, Aircraft Fuel System. (e) Unsafe Condition This AD was prompted by a report of a leaking electrical fuel transfer pump. The FAA is issuing this AD to detect and replace certain non-conforming parts. The unsafe condition, if not addressed, could result in an in-flight fire and possible explosion in the wing or center fuselage. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Definitions For the purpose of this AD the definitions in paragraphs (g)(1) through (4) of this AD appl

Part numbers this directive names (1)

Extracted from the directive text. For each: the NSN cross-reference where one exists, sellers listing it here, and open DLA solicitations on the NSN.