Data / Federal rules / 2026-09801
Airworthiness Directives; Stemme GmbH Gliders
The Federal Aviation Administration published this proposed rule in the Federal Register on May 15, 2026. Comments closed on June 29, 2026.
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What the agency says
The FAA proposes to adopt a new airworthiness directive (AD) for all Stemme GmbH (Stemme) Model Stemme S 12 gliders. This proposed AD was prompted by reports of fuel leaking around certain copper sealing rings within the fuel system. This proposed AD would require repetitive visual checks of the fuel system for fuel leakage, and replacement of the affected copper sealing ring. This proposed AD would also prohibit the installation of affected parts. The FAA is proposing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2026-09801
- Type
- Proposed rule
- Action
- Notice of proposed rulemaking (NPRM)
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- May 15, 2026
- Comments due
- June 29, 2026
- Dates
- The FAA must receive comments on this NPRM by June 29, 2026.
- Docket
- Docket No. FAA-2026-4637; Project Identifier MCAI-2025-01226-G
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 3
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in May 2026
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.