# Proposed AD FAA-2024-1297: Airbus Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-17-08
- Products: Airbus Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 16, 2024, 89 FR 42820
- Comments due: July 1, 2024
- Became: [AD 2024-17-08](https://openairdocs.org/ad/2024-17-08)
- Docket: FAA-2024-1297 (https://www.regulations.gov/docket/FAA-2024-1297, where comments are filed)
- Project: MCAI-2022-00736-R
- FR document: 2024-09791
- Official PDF: https://openairdocs.org/files/sha256/b1/5f/b15fa66cb6b821640007e7656ad78d890b68605e21a128313280ee21f6bd4d21 (from https://www.govinfo.gov/content/pkg/FR-2024-05-16/pdf/2024-09791.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/05/16/2024-09791/airworthiness-directives-airbus-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-09791-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-1297

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Model EC225LP helicopters. This proposed 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 proposed AD would also require inspecting certain M/R mast cover plates and accomplishing MGB oil analyses and, depending on the results, replacing the M/R mast cover plate, accomplishing an additional inspection, or replacing the MGB. This proposed AD would also prohibit installing certain M/R mast upper stops assembly screws, M/R masts with an affected M/R mast upper stops assembly screw installed, or used M/R mast cover plates on any helicopter. Lastly, this proposed AD would prohibit 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 proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 16, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-09791, comments due Jul 1, 2024 (https://www.federalregister.gov/documents/2024/05/16/2024-09791/airworthiness-directives-airbus-helicopters)

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