# Airworthiness Directives; Dassault Aviation Airplanes
> **Rule** · Final rule. · Published 2017-09-22 · Effective 2017-10-27 · 82 FR 44305
## Document
- **Document number:** 2017-19766
- **Category:** airworthiness
- **Manufacturer:** Dassault Aviation
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 44305
- **Publication date:** 2017-09-22
- **Effective date:** 2017-10-27
- **FAA docket:** Docket No. FAA-2017-0494
## Abstract

We are superseding Airworthiness Directive (AD) 2016-17-02, which applied to certain Dassault Aviation Model FALCON 900EX and FALCON 2000EX airplanes. AD 2016-17-02 required revising the airplane flight manual (AFM) to include procedures to follow when an airplane is operating in icing conditions. AD 2016-17-02 also provided optional actions after which the AFM revision may be removed from the AFM. Since we issued AD 2016-17-02, we have determined additional actions are necessary to address the identified unsafe condition. This new AD retains the requirement of AD 2016-17-02, and also requires a detailed inspection of the wing anti-ice system ducting (anti-ice pipes) for the presence of a diaphragm, and replacement of ducting or re- identification of the ducting part marking. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/09/22/2017-19766/airworthiness-directives-dassault-aviation-airplanes)
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