# Airworthiness Directives; Dassault Aviation Airplanes
> **Rule** · Final rule. · Published 2012-08-07 · Effective 2012-09-11 · 77 FR 46946
## Document
- **Document number:** 2012-18582
- **Category:** airworthiness
- **Manufacturer:** Dassault Aviation
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 77 FR 46946
- **Publication date:** 2012-08-07
- **Effective date:** 2012-09-11
- **FAA docket:** Docket No. FAA-2012-0269
## Abstract

We are adopting a new airworthiness directive (AD) for certain Dassault Aviation Model FALCON 7X airplanes. This AD was prompted by a report that a passenger oxygen pipe at frame 10 was chafing against the forward lavatory rear structure, raising the risk of the oxygen pipe developing a crack. This AD requires modifying the routing of and, if necessary, replacing, the oxygen pipe. We are issuing this AD to prevent rupture of the oxygen pipe which, in case of a cabin depressurization, would impair operation of the passenger oxygen distribution system.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/08/07/2012-18582/airworthiness-directives-dassault-aviation-airplanes)
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