# Airworthiness Directives; DASSAULT AVIATION Airplanes
> **Rule** · Final rule. · Published 2012-02-29 · Effective 2012-04-04 · 77 FR 12175
## Document
- **Document number:** 2012-3908
- **Category:** airworthiness
- **Manufacturer:** DASSAULT AVIATION
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 77 FR 12175
- **Publication date:** 2012-02-29
- **Effective date:** 2012-04-04
- **FAA docket:** Docket No. FAA-2011-1166
## Abstract

We are adopting a new airworthiness directive (AD) for all DASSAULT AVIATION Model MYSTERE-FALCON 50 airplanes. This AD was prompted by reports of cracking of the flap tracks. This AD requires revising the maintenance program to include revised airworthiness limitations. We are issuing this AD to prevent cracking of the flap tracks, which could lead to flap asymmetry and loss of control of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/02/29/2012-3908/airworthiness-directives-dassault-aviation-airplanes)
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