# Airworthiness Directives; PZL Swidnik S.A. Helicopters
> **Rule** · Final rule; request for comments. · Published 2021-09-27 · Effective 2021-10-12 · 86 FR 53200
## Document
- **Document number:** 2021-20830
- **Category:** airworthiness
- **Manufacturer:** PZL Swidnik S.A.
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 86 FR 53200
- **Publication date:** 2021-09-27
- **Effective date:** 2021-10-12
- **FAA docket:** Docket No. FAA-2021-0723
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain PZL Swidnik S.A. Model PZL W-3A helicopters. This AD was prompted by a report that displaced teeth were detected on the moveable assemblies of a main rotor (MR) blade droop stop. This AD requires removing from service the moveable assemblies from each affected MR blade droop stop and prohibits installation of an affected MR blade droop stop and moveable assemblies of affected MR blade droop stops. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/09/27/2021-20830/airworthiness-directives-pzl-swidnik-sa-helicopters)
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