# Airworthiness Directives; Airbus Helicopters
> **Rule** · Final rule. · Published 2021-05-20 · Effective 2021-06-24 · 86 FR 27271
## Document
- **Document number:** 2021-10608
- **Category:** airworthiness
- **Manufacturer:** Airbus
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 27271
- **Publication date:** 2021-05-20
- **Effective date:** 2021-06-24
- **FAA docket:** Docket No. FAA-2021-0105
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model SA330J helicopters. This AD was prompted by the failure of a second stage planet gear installed in the main gearbox (MGB). This AD requires repetitively inspecting the MGB particle detector and the MGB bottom housing (oil sump) for metal particles, analyzing any metal particles that are found, and replacement of the MGB if necessary, as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/05/20/2021-10608/airworthiness-directives-airbus-helicopters)
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