# Proposed AD FAA-2021-0505: Leonardo S.p.a. Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-19-03
- Products: Leonardo
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 7, 2021, 86 FR 35690
- Comments due: August 23, 2021
- Became: [AD 2021-19-03](https://openairdocs.org/ad/2021-19-03)
- Docket: FAA-2021-0505 (https://www.regulations.gov/docket/FAA-2021-0505, where comments are filed)
- Project: 2018-SW-004-AD
- FR document: 2021-14401
- Official PDF: https://openairdocs.org/files/sha256/3c/b7/3cb7327e8f3420ad087e3a4b4078bc600fe479bd0195f7bc9d0b39eb6c8020ac (from https://www.govinfo.gov/content/pkg/FR-2021-07-07/pdf/2021-14401.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/07/07/2021-14401/airworthiness-directives-leonardo-spa-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/12CE80F0F570AC688625870B006FC8E2.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0505

## 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 reports of spurious in-flight disconnections of the automatic flight control system (AFCS). This proposed AD would require updating certain ''Primus Epic'' system software, as specified in a European Aviation Safety Agency (now 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

- Jul 7, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-14401, comments due Aug 23, 2021 (https://www.federalregister.gov/documents/2021/07/07/2021-14401/airworthiness-directives-leonardo-spa-helicopters)

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