# Airworthiness Directives; Stemme GmbH Gliders
> **Rule** · Final rule; request for comments. · Published 2026-07-24 · Effective 2026-07-24 · 91 FR 46709
## Document
- **Document number:** 2026-15004
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 91 FR 46709
- **Publication date:** 2026-07-24
- **Effective date:** 2026-07-24
- **FAA docket:** Docket No. FAA-2026-7222
## Abstract

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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/07/24/2026-15004/airworthiness-directives-stemme-gmbh-gliders)
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