# Airworthiness Directives; Airbus Helicopters
> **Rule** · Final rule. · Published 2024-10-03 · Effective 2024-11-07 · 89 FR 80379
## Document
- **Document number:** 2024-22800
- **Category:** airworthiness
- **Manufacturer:** Airbus
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 89 FR 80379
- **Publication date:** 2024-10-03
- **Effective date:** 2024-11-07
- **FAA docket:** Docket No. FAA-2024-1297
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model EC225LP helicopters. This AD was prompted by a report of water in the oil of a main gearbox (MGB). This AD requires replacing certain main rotor (M/R) mast upper stops assembly screws. This AD also requires inspecting certain M/R mast cover plates and accomplishing MGB oil analyses and, depending on the results, taking corrective action. This AD prohibits installing certain M/R mast upper stops assembly screws, M/R masts with an affected M/R mast upper stops assembly screw installed, and used M/R mast cover plates on any helicopter. Lastly, this AD prohibits installing affected M/R masts unless the inspections are done. These actions are specified in a 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/2024/10/03/2024-22800/airworthiness-directives-airbus-helicopters)
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