# Airworthiness Directives; Various Restricted Category Helicopters
> **Rule** · Final rule. · Published 2020-10-29 · Effective 2020-12-03 · 85 FR 68429
## Document
- **Document number:** 2020-23929
- **Category:** airworthiness
- **Manufacturer:** Various Restricted Category
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 68429
- **Publication date:** 2020-10-29
- **Effective date:** 2020-12-03
- **FAA docket:** Docket No. FAA-2020-0625
## Abstract

The FAA is adopting a new airworthiness directive (AD) for various restricted category helicopters, originally manufactured by Sikorsky Aircraft Corporation (Sikorsky), Model EH-60A, HH-60L, S-70, S-70A, S-70C, S-70C(M), S-70C(M1), and UH-60A. This AD requires initial and recurring inspections of the main rotor (M/R) blade spindle cuff for a crack. This AD was prompted by multiple reports of a cracked M/R blade spindle cuff. These actions are intended to prevent an unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/10/29/2020-23929/airworthiness-directives-various-restricted-category-helicopters)
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