# Airworthiness Directives; Dassault Aviation Airplanes
> **Rule** · Final rule. · Published 2018-11-27 · Effective 2019-01-02 · 83 FR 60767
## Document
- **Document number:** 2018-25661
- **Category:** airworthiness
- **Manufacturer:** Dassault Aviation
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 60767
- **Publication date:** 2018-11-27
- **Effective date:** 2019-01-02
- **FAA docket:** Docket No. FAA-2018-0760
## Abstract

We are adopting a new airworthiness directive (AD) for certain Dassault Aviation Model MYSTERE-FALCON 50, MYSTERE-FALCON 900, and FALCON 900EX airplanes. This AD was prompted by reports of cracked reinforcing straps (doublers) on the ailerons of airplanes equipped with blended winglets. This AD requires repetitive detailed inspections for cracking of the upper and lower reinforcing straps on the ailerons, and replacement if necessary. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/11/27/2018-25661/airworthiness-directives-dassault-aviation-airplanes)
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