# Proposed AD FAA-2016-4278: AgustaWestland S.p.A. (Agusta) Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-26-01
- Products: AgustaWestland
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 11, 2016, 81 FR 12838
- Comments due: May 10, 2016
- Became: [AD 2016-26-01](https://openairdocs.org/ad/2016-26-01)
- Docket: FAA-2016-4278 (https://www.regulations.gov/docket/FAA-2016-4278, where comments are filed)
- Project: 2012-SW-022-AD
- FR document: 2016-05368
- Official PDF: https://openairdocs.org/files/sha256/b7/b8/b7b86686fd21635742a97559bea7f1f4d56850fbbece370b3576a835667be31e (from https://www.govinfo.gov/content/pkg/FR-2016-03-11/pdf/2016-05368.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/03/11/2016-05368/airworthiness-directives-agustawestland-spa-agusta-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/799AA0363D1D58CB86257F730050D689.0001
- Page: https://openairdocs.org/proposed/FAA-2016-4278

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Agusta Model AB139 and AW139 helicopters. This proposed AD would require performing operational checks of both hydraulic systems. This proposed AD is prompted by an assessment of the hydraulic systems of the helicopter following an accident. The proposed actions are intended to prevent loss of hydraulic power to the flight controls and subsequent loss of control of the helicopter.

## Notices in this docket

- Mar 11, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-05368, comments due May 10, 2016 (https://www.federalregister.gov/documents/2016/03/11/2016-05368/airworthiness-directives-agustawestland-spa-agusta-helicopters)

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