# Airworthiness Directives; Dassault Aviation Airplanes
> **Rule** · Final rule. · Published 2026-04-06 · Effective 2026-05-11 · 91 FR 17137
## Document
- **Document number:** 2026-06627
- **Category:** airworthiness
- **Manufacturer:** Dassault Aviation
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 91 FR 17137
- **Publication date:** 2026-04-06
- **Effective date:** 2026-05-11
- **FAA docket:** Docket No. FAA-2025-2553
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Dassault Aviation Model FALCON 2000EX airplanes. This AD was prompted by a report of simultaneous failures of the main DC buses powered by Generator 1 (GEN1), and Generator 2 (GEN2) after flap extension during approach. This AD requires revising the existing airplane flight manual (AFM). The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/04/06/2026-06627/airworthiness-directives-dassault-aviation-airplanes)
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