# Proposed AD FAA-2021-0793: Safran Helicopter Engines, S.A. (Type Certificate Previously Held by Turbomeca S.A.) Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-26-26
- Products: Safran Helicopter Engines
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 20, 2021, 86 FR 52106
- Comments due: November 4, 2021
- Became: [AD 2021-26-26](https://openairdocs.org/ad/2021-26-26)
- Docket: FAA-2021-0793 (https://www.regulations.gov/docket/FAA-2021-0793, where comments are filed)
- Project: MCAI-2021-00372-E
- FR document: 2021-20230
- Official PDF: https://openairdocs.org/files/sha256/bc/70/bc7095f84887370b728fe356910fc6a1dcae21dbafd8bc3bc8e29cfbf2144f60 (from https://www.govinfo.gov/content/pkg/FR-2021-09-20/pdf/2021-20230.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/09/20/2021-20230/airworthiness-directives-safran-helicopter-engines-sa-type-certificate-previously-held-by-turbomeca
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/99E4984E052D421D862587560055F18D.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0793

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2005-12-08, which applies to Safran Helicopter Engines, S.A. (Safran Helicopter Engines) Arrius 2B1, 2B1A, 2B1A-1, and 2B2 model turboshaft engines. AD 2005-12-08 requires replacing the software in the engine electronic control unit (EECU). Since the FAA issued AD 2005-12-08, the manufacturer determined that certain previously affected EECUs are not subject to the unsafe condition identified in AD 2005-12-08. This proposed AD would retain the requirements of AD 2005-12-08 for engines with a certain EECU part number (P/N) installed. This proposed AD would also prohibit installation of an affected EECU onto any engine. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 20, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-20230, comments due Nov 4, 2021 (https://www.federalregister.gov/documents/2021/09/20/2021-20230/airworthiness-directives-safran-helicopter-engines-sa-type-certificate-previously-held-by-turbomeca)

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