# Airworthiness Directives; Dassault Aviation Airplanes
> **Rule** · Final rule; request for comments. · Published 2017-11-20 · Effective 2017-12-01 · 82 FR 55032
## Document
- **Document number:** 2017-24810
- **Category:** airworthiness
- **Manufacturer:** Dassault Aviation
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 82 FR 55032
- **Publication date:** 2017-11-20
- **Effective date:** 2017-12-01
- **FAA docket:** Docket No. FAA-2017-1023
## Abstract

We are superseding Airworthiness Directive (AD) 2017-19-17, which applied to certain Dassault Aviation Model FALCON 900EX and FALCON 2000EX airplanes. AD 2017-19-17 required revising the airplane flight manual (AFM) to include procedures to follow when an airplane is operating in icing conditions. AD 2017-19-17 also required a detailed inspection of the wing anti-ice system ducting for the presence of a diaphragm, and follow-on actions (replacement of ducting or re- identification of the ducting part marking). This new AD retains the actions required by AD 2017-19-17, and corrects the follow-on actions for certain airplanes. This AD was prompted by a determination that the follow-on actions specified in AD 2017-19-17 were incorrect for certain airplanes. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/11/20/2017-24810/airworthiness-directives-dassault-aviation-airplanes)
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