# Noise Certification Standards for Tiltrotors
> **Rule** · Final rule. · Published 2013-01-08 · Effective 2013-03-11 · 78 FR 1133
## Document
- **Document number:** 2013-00111
- **Category:** other
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 1133
- **Publication date:** 2013-01-08
- **Effective date:** 2013-03-11
- **FAA docket:** Docket No. FAA-2011-0629
## Abstract

This rule amends the regulations governing noise certification standards for issuing type and airworthiness certificates for a new civil, hybrid airplane-rotorcraft known as the tiltrotor. This noise standard establishes new noise limits and procedures as the basis to ensure consistent aviation noise reduction technology is incorporated in tiltrotors for environmental protection. It provides uniform noise certification standards for tiltrotors certificated in the United States and harmonizes the U.S. regulations with the standards of the International Civil Aviation Organization's (ICAO) Annex 16.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/01/08/2013-00111/noise-certification-standards-for-tiltrotors)
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