# Proposed AD FAA-2023-2238: Leonardo S.p.a. Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-15-11
- Products: Leonardo
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 11, 2023, 88 FR 85856
- Comments due: January 25, 2024
- Became: [AD 2024-15-11](https://openairdocs.org/ad/2024-15-11)
- Docket: FAA-2023-2238 (https://www.regulations.gov/docket/FAA-2023-2238, where comments are filed)
- Project: MCAI-2023-00698-R
- FR document: 2023-26934
- Official PDF: https://openairdocs.org/files/sha256/85/23/8523f78946de334d7ebf9b4ec99fc88ffd651cd99d791652dd7d86f61548c669 (from https://www.govinfo.gov/content/pkg/FR-2023-12-11/pdf/2023-26934.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/12/11/2023-26934/airworthiness-directives-leonardo-spa-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-26934-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-2238

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Leonardo S.p.a. Model A109C, A109E, A109K2, A109S, and AW109SP helicopters. This proposed AD was prompted by reports of loose tail rotor duplex bearing locking nuts, possibly caused by improper installation. This proposed AD would require disassembling certain tail rotor duplex bearings and reassembling them in accordance with updated service information. This proposed AD would also prohibit installing certain tail rotor duplex bearings. 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

- Dec 11, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-26934, comments due Jan 25, 2024 (https://www.federalregister.gov/documents/2023/12/11/2023-26934/airworthiness-directives-leonardo-spa-helicopters)

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