# Proposed AD FAA-2006-25085: Eurocopter France Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350C, AS350D, AS350D1, and AS355E Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-06-15
- Products: Eurocopter France
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 30, 2006, 71 FR 37515
- Comments due: August 29, 2006
- Became: [AD 2007-06-15](https://openairdocs.org/ad/2007-06-15)
- Docket: FAA-2006-25085 (https://www.regulations.gov/docket/FAA-2006-25085, where comments are filed)
- Project: 2006-SW-02-AD
- FR document: 06-5880
- Official PDF: https://openairdocs.org/files/sha256/e6/5b/e65b94a7518b3387876c04e1ecd92cfa8226edb1ee4f090faae3dfd8e03c05de (from https://www.govinfo.gov/content/pkg/FR-2006-06-30/pdf/06-5880.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/06/30/06-5880/airworthiness-directives-eurocopter-france-model-as350b-as350b1-as350b2-as350b3-as350ba-as350c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1B1ADAF1CE56CC028625719D004E9310.0001
- Page: https://openairdocs.org/proposed/FAA-2006-25085

## Summary

This document proposes adopting a new airworthiness directive (AD) for the specified Eurocopter France (Eurocopter) model helicopters. This proposal would require replacing a certain hydraulic drive belt (drive belt). Also proposed is reducing the lubrication time interval for a certain hydraulic pump drive shaft (drive shaft). This proposal is prompted by in-flight failures of the drive belt and the drive shaft. The actions specified by this proposed AD are intended to prevent in-flight failure of the drive belt or drive shaft, loss of hydraulic power to the flight control system, and subsequent loss of control of the helicopter.

## Notices in this docket

- Jun 30, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document 06-5880, comments due Aug 29, 2006 (https://www.federalregister.gov/documents/2006/06/30/06-5880/airworthiness-directives-eurocopter-france-model-as350b-as350b1-as350b2-as350b3-as350ba-as350c)

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