# Airworthiness Directives; MD Helicopters Inc. (MDHI), Helicopters
> **Rule** · Final rule. · Published 2020-09-23 · Effective 2020-10-28 · 85 FR 59663
## Document
- **Document number:** 2020-20930
- **Category:** airworthiness
- **Manufacturer:** MD
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 59663
- **Publication date:** 2020-09-23
- **Effective date:** 2020-10-28
- **FAA docket:** Docket No. FAA-2020-0483
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain MD Helicopters Inc. (MDHI) Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD was prompted by reports of abrasion strips departing the main rotor (MR) blade in- flight. This AD requires tap inspecting each MR blade leading edge abrasion strip. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/09/23/2020-20930/airworthiness-directives-md-helicopters-inc-mdhi-helicopters)
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