# Proposed AD FAA-2020-0797: Leonardo S.p.a. Helicopters (Type Certificate Previously Held by Agusta S.p.A.)

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-05-21
- Products: Leonardo
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 15, 2020, 85 FR 57165
- Comments due: October 30, 2020
- Became: [AD 2021-05-21](https://openairdocs.org/ad/2021-05-21)
- Docket: FAA-2020-0797 (https://www.regulations.gov/docket/FAA-2020-0797, where comments are filed)
- FR document: 2020-20228
- Official PDF: https://openairdocs.org/files/sha256/ee/2b/ee2b4273cb137139be456aa40d73c7d62c2a0a4b6e9c8d8da3d8fc512b41f71e (from https://www.govinfo.gov/content/pkg/FR-2020-09-15/pdf/2020-20228.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/09/15/2020-20228/airworthiness-directives-leonardo-spa-helicopters-type-certificate-previously-held-by-agusta-spa
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2A9C3F72B16D9E1A862585E40048BE17.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0797

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2017-23-08 for Agusta S.p.A. (now Leonardo S.p.a.) Model AB139 and AW139 helicopters. AD 2017-23-08 requires repetitively inspecting the main rotor (M/R) rotating scissors, removing certain lower half scissor spherical bearings (bearings) from service, replacing the removed bearings with a new bearing, and installing a special nut. Since the FAA issued AD 2017-23-08, investigation results determined that a quality control issue may have affected the production of the affected bearings. This proposed AD would retain the requirements of AD 2017-23- 08 and require replacing each affected bearing with a certain part- numbered bearing. The actions of this proposed AD are intended to address an unsafe condition on these products.

## Notices in this docket

- Sep 15, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-20228, comments due Oct 30, 2020 (https://www.federalregister.gov/documents/2020/09/15/2020-20228/airworthiness-directives-leonardo-spa-helicopters-type-certificate-previously-held-by-agusta-spa)

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