# Proposed AD FAA-2020-0411: Leonardo S.p.a. Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-19-11
- Products: Leonardo
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 24, 2020, 85 FR 22970
- Comments due: June 23, 2020
- Became: [AD 2020-19-11](https://openairdocs.org/ad/2020-19-11)
- Docket: FAA-2020-0411 (https://www.regulations.gov/docket/FAA-2020-0411, where comments are filed)
- FR document: 2020-08644
- Official PDF: https://openairdocs.org/files/sha256/9d/c6/9dc66f80bf9b9432c97fa7b12e1e080f970cfdf70bfd1692ecbdf21ef8f7e00a (from https://www.govinfo.gov/content/pkg/FR-2020-04-24/pdf/2020-08644.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/04/24/2020-08644/airworthiness-directives-leonardo-spa-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A8ABA455A5692D1D8625855400457428.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0411

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Leonardo S.p.a. (Leonardo) Model A119 and AW119MKII helicopters. This proposed AD would require repetitive borescope inspections of the tail rotor gearbox (TGB) and depending on the inspection results, removing the TGB from service. This proposed AD was prompted by reports of corrosion on the internal surface of the 90- degree TGB output shaft. The actions of this proposed AD are intended to address an unsafe condition on these products.

## Notices in this docket

- Apr 24, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-08644, comments due Jun 23, 2020 (https://www.federalregister.gov/documents/2020/04/24/2020-08644/airworthiness-directives-leonardo-spa-helicopters)

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