# Airworthiness Directives; MD Helicopter Inc., Helicopters
> **Rule** · Final rule. · Published 2020-05-26 · Effective 2020-06-30 · 85 FR 31359
## Document
- **Document number:** 2020-11157
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 31359
- **Publication date:** 2020-05-26
- **Effective date:** 2020-06-30
- **FAA docket:** Docket No. FAA-2020-0064
## Abstract

The FAA is adopting a new airworthiness directive (AD) for MD Helicopters Inc., (MDHI) Model 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD was prompted by a report of non-conforming main rotor (M/R) hub lead-lag bolts (bolts). This AD requires removing certain bolts from service. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/05/26/2020-11157/airworthiness-directives-md-helicopter-inc-helicopters)
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