# Special Condition: Robinson R44 Helicopters, § 27.1309, Installation of an Autopilot (AP) Stabilization Augmentation System (SAS) That Has Potential Failure Modes With Criticality Categories Higher Than Those Envisioned by the Applicable Airworthiness Regulations
> **Rule** · Final special condition. · Published 2006-03-29 · Effective 2006-04-28 · 71 FR 15557
## Document
- **Document number:** 06-3013
- **Category:** other
- **Type:** Rule
- **Action:** Final special condition.
- **Citation:** 71 FR 15557
- **Publication date:** 2006-03-29
- **Effective date:** 2006-04-28
- **FAA docket:** Docket No. SW013
## Abstract

This special condition is issued for the modification of the Robinson Model R44 helicopter. This modification will have novel or unusual design features associated with installing a complex Autopilot/ Stabilization Augmentation System (AP/SAS) that has potential failure modes with more severe adverse consequences than those envisioned by the existing applicable airworthiness regulations. This proposal contains the additional safety standards that the Administrator considers necessary to ensure that the failures and their effects are sufficiently analyzed and contained.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/03/29/06-3013/special-condition-robinson-r44-helicopters-271309-installation-of-an-autopilot-ap-stabilization)
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