# Activation of Ice Protection
> **Rule** · Final rule. · Published 2009-08-03 · Effective 2009-09-02 · 74 FR 38328
## Document
- **Document number:** E9-18483
- **Category:** other
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 74 FR 38328
- **Publication date:** 2009-08-03
- **Effective date:** 2009-09-02
- **FAA docket:** Docket No.: FAA-2007-27654
## Abstract

The Federal Aviation Administration amends the airworthiness standards applicable to transport category airplanes certificated for flight in icing conditions. The rule requires a means to ensure timely activation of the airframe ice protection system. This rule is the result of information gathered from a review of icing accidents and incidents, and will improve the level of safety for new airplane designs for operations in icing conditions.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/08/03/E9-18483/activation-of-ice-protection)
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