# Proposed AD FAA-2011-0448: Eurocopter France Model EC 120B Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-21-18
- Products: Eurocopter France
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 13, 2011, 76 FR 27952
- Comments due: July 12, 2011
- Became: [AD 2011-21-18](https://openairdocs.org/ad/2011-21-18)
- Docket: FAA-2011-0448 (https://www.regulations.gov/docket/FAA-2011-0448, where comments are filed)
- Project: 2007-SW-51-AD
- FR document: 2011-11752
- Official PDF: https://openairdocs.org/files/sha256/02/eb/02ebd95bc3047998bc0ba118487a4ff9c0d7871ec822e53c254a1b992d502076 (from https://www.govinfo.gov/content/pkg/FR-2011-05-13/pdf/2011-11752.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/05/13/2011-11752/airworthiness-directives-eurocopter-france-model-ec-120b-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8130300801C315A98625788F004D93D3.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0448

## Summary

We propose to adopt a new airworthiness directive (AD) for the specified Eurocopter France Model EC 120B helicopters. This proposed AD would require modifying the pilot cyclic control friction device by replacing a certain thrust washer with two thrust washers. This proposed AD is prompted by an incident in which the pilot encountered a sudden restriction of the cyclic control movement during flight. The actions specified by this proposed AD are intended to prevent jamming of a pilot cyclic control stick and subsequent loss of control of the helicopter.

## Notices in this docket

- May 13, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-11752, comments due Jul 12, 2011 (https://www.federalregister.gov/documents/2011/05/13/2011-11752/airworthiness-directives-eurocopter-france-model-ec-120b-helicopters)

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