# Airworthiness Directives; Robinson Helicopter Company Helicopters
> **Rule** · Final rule. · Published 2017-01-04 · Effective 2017-02-08 · 82 FR 716
## Document
- **Document number:** 2016-30832
- **Category:** airworthiness
- **Manufacturer:** Robinson Helicopter Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 716
- **Publication date:** 2017-01-04
- **Effective date:** 2017-02-08
- **FAA docket:** Docket No. FAA-2016-0733
## Abstract

We are adopting a new airworthiness directive (AD) for Robinson Helicopter Company (Robinson) Model R44, R44 II, and R66 helicopters. This AD requires inspecting the main rotor blade (MRB). This AD was prompted by a determination that some MRBs may have reduced blade thickness due to blending out corrosion. The actions are intended to prevent the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/01/04/2016-30832/airworthiness-directives-robinson-helicopter-company-helicopters)
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