# Airworthiness Directives; Schempp-Hirth Flugzeugbau GmbH Gliders
> **Rule** · Final rule. · Published 2025-03-04 · Effective 2025-04-08 · 90 FR 11129
## Document
- **Document number:** 2025-03442
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 90 FR 11129
- **Publication date:** 2025-03-04
- **Effective date:** 2025-04-08
- **FAA docket:** Docket No. FAA-2024-2135
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Schempp-Hirth Flugzeugbau GmbH Model Duo Discus and Duo Discus T gliders. This AD was prompted by reports of gliders' canopies opening during air tow. This AD requires modifying the canopy locking mechanism. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/03/04/2025-03442/airworthiness-directives-schempp-hirth-flugzeugbau-gmbh-gliders)
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