# Proposed AD 2001-SW-20-AD: Eurocopter France Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350C, AS350D, AS350D1, AS355E, AS355F, AS355F1, AS355F2, and AS355N Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2002-06-04
- Products: Eurocopter France
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 28, 2001, 66 FR 59375
- Comments due: January 28, 2002
- Became: [AD 2002-06-04](https://openairdocs.org/ad/2002-06-04)
- Docket: 2001-SW-20-AD
- FR document: 01-29594
- Official PDF: https://openairdocs.org/files/sha256/cc/5c/cc5ceb215cc4dbfe37fd4fdaf84b1e255896e3df60bd88f25ba071fe90673059 (from https://www.govinfo.gov/content/pkg/FR-2001-11-28/pdf/01-29594.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/11/28/01-29594/airworthiness-directives-eurocopter-france-model-as350b-as350b1-as350b2-as350b3-as350ba-as350c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D198A81C554831B786256B120061ABCF.0001
- Page: https://openairdocs.org/proposed/2001-SW-20-AD

## Summary

This document proposes adopting a new airworthiness directive (AD) for Eurocopter France (ECF) Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350C, AS350D, AS350D1, AS355E, AS355F, AS355F1, AS355F2, and AS355N helicopters. This proposal would require replacing the tail rotor hub pitch change plate "SNR" bearing (bearing). This proposal is prompted by fatigue cracks found in the bearings. The actions specified by the proposed AD are intended to prevent seizure of the bearing, loss of tail rotor effectiveness, and subsequent loss of control of the helicopter.

## Notices in this docket

- Nov 28, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-29594, comments due Jan 28, 2002 (https://www.federalregister.gov/documents/2001/11/28/01-29594/airworthiness-directives-eurocopter-france-model-as350b-as350b1-as350b2-as350b3-as350ba-as350c)

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