# Proposed AD FAA-2023-2231: Leonardo S.p.a. Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-04-05
- Products: Leonardo
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 6, 2023, 88 FR 84767
- Comments due: January 22, 2024
- Became: [AD 2024-04-05](https://openairdocs.org/ad/2024-04-05)
- Docket: FAA-2023-2231 (https://www.regulations.gov/docket/FAA-2023-2231, where comments are filed)
- Project: MCAI-2022-01623-R
- FR document: 2023-26742
- Official PDF: https://openairdocs.org/files/sha256/e4/96/e4960bcead4ce1f9dd81283309bdebf04cf1edc2428713a5b3c24b8ec2b5393b (from https://www.govinfo.gov/content/pkg/FR-2023-12-06/pdf/2023-26742.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/12/06/2023-26742/airworthiness-directives-leonardo-spa-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-26742-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-2231

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Leonardo S.p.a. Model AB412 and AB412 EP helicopters. This proposed AD was prompted by reports of cracks in the lateral mounts of the main transmission support case. This proposed AD would require repetitive visual inspections and fluorescent penetrant inspections (FPI) and, depending on the results, corrective action, as 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 6, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-26742, comments due Jan 22, 2024 (https://www.federalregister.gov/documents/2023/12/06/2023-26742/airworthiness-directives-leonardo-spa-helicopters)

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