# Airworthiness Directives; Airbus Helicopters
> **Rule** · Final rule. · Published 2020-11-19 · Effective 2020-12-24 · 85 FR 73613
## Document
- **Document number:** 2020-25471
- **Category:** airworthiness
- **Manufacturer:** Airbus
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 73613
- **Publication date:** 2020-11-19
- **Effective date:** 2020-12-24
- **FAA docket:** Docket No. FAA-2020-0652
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Airbus Helicopters Model AS332C, AS332C1, AS332L, and AS332L1 helicopters. This AD requires inspecting the main rotor (M/R) hub assembly (hub) phonic wheel lock washer (lock washer) for correct installation and depending on the outcome, repairing or replacing the M/R hub. This AD was prompted by reported occurrences of M/R revolutions per minute ("NR") sensor fluctuations. The actions of this AD are intended to address an unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/11/19/2020-25471/airworthiness-directives-airbus-helicopters)
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