# Proposed AD FAA-2021-0373: Leonardo S.p.a. Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-16-06
- Products: Leonardo
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 21, 2021, 86 FR 27538
- Comments due: July 6, 2021
- Became: [AD 2021-16-06](https://openairdocs.org/ad/2021-16-06)
- Docket: FAA-2021-0373 (https://www.regulations.gov/docket/FAA-2021-0373, where comments are filed)
- Project: MCAI-2020-01352-R
- FR document: 2021-10700
- Official PDF: https://openairdocs.org/files/sha256/f7/e1/f7e1d1d14a7a5df755d8b3f6edeb2d7e1e8e622a590abf7a423b5de3f8c99edd (from https://www.govinfo.gov/content/pkg/FR-2021-05-21/pdf/2021-10700.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/05/21/2021-10700/airworthiness-directives-leonardo-spa-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7EA82396FE0E1EF6862586DC00573C76.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0373

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2020-19-11 for certain Leonardo S.p.a. Model A119 and AW119 MKII helicopters. AD 2020-19-11 requires repetitive borescope inspections of the 90-degree tail rotor gearbox (TGB) and depending on the inspection results, removing the TGB from service. Since the FAA issued AD 2020- 19-11, it was determined that additional parts may be susceptible to the unsafe condition. This proposed AD would retain the inspection requirements of AD 2020-19-11, and revise the compliance time and applicability. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 21, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-10700, comments due Jul 6, 2021 (https://www.federalregister.gov/documents/2021/05/21/2021-10700/airworthiness-directives-leonardo-spa-helicopters)

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