# Proposed AD FAA-2022-0283: Leonardo S.p.a. Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-11-20
- Products: Leonardo
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 21, 2022, 87 FR 15899
- Comments due: May 5, 2022
- Became: [AD 2022-11-20](https://openairdocs.org/ad/2022-11-20)
- Docket: FAA-2022-0283 (https://www.regulations.gov/docket/FAA-2022-0283, where comments are filed)
- Project: MCAI-2021-01285-R
- FR document: 2022-05588
- Official PDF: https://openairdocs.org/files/sha256/13/b0/13b0227e2bad792c111a3c4c4a89ca4615d6b521f1d739129aa9e829a43b1288 (from https://www.govinfo.gov/content/pkg/FR-2022-03-21/pdf/2022-05588.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/03/21/2022-05588/airworthiness-directives-leonardo-spa-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-05588-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0283

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This proposed AD was prompted by a large crack detected on the tail gearbox (TGB) fitting during a scheduled inspection and the determination that certain TGB fittings are required to be inspected by the use of a borescope. This proposed AD would require a one-time borescope inspection of certain part-numbered TGB fittings, and depending on the inspection results, removing the affected part from service and replacing with an airworthy part, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Mar 21, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-05588, comments due May 5, 2022 (https://www.federalregister.gov/documents/2022/03/21/2022-05588/airworthiness-directives-leonardo-spa-helicopters)

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