# Special Conditions: Cirrus Design Corporation, Model SF50; Fire Extinguishing for Upper Aft Fuselage Mounted Engine
> **Rule** · Final special conditions; request for comments. · Published 2010-04-20 · Effective 2010-04-12 · 75 FR 20516
## Document
- **Document number:** 2010-9026
- **Category:** other
- **Type:** Rule
- **Action:** Final special conditions; request for comments.
- **Citation:** 75 FR 20516
- **Publication date:** 2010-04-20
- **Effective date:** 2010-04-12
- **FAA docket:** Docket No. CE305
## Abstract

These special conditions are issued for the Cirrus Design Corporation, model SF50 airplane. This single turbofan engine airplane will have a novel or unusual design feature(s) associated with mounting the engine in the aft fuselage. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/04/20/2010-9026/special-conditions-cirrus-design-corporation-model-sf50-fire-extinguishing-for-upper-aft-fuselage)
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