# Proposed AD 2000-SW-37-AD: Bell Helicopter Textron Canada Model 206L-4 Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-20-03
- Products: Bell Helicopter Textron Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 25, 2001, 66 FR 33649
- Comments due: August 24, 2001
- Became: [AD 2001-20-03](https://openairdocs.org/ad/2001-20-03)
- Docket: 2000-SW-37-AD
- FR document: 01-15797
- Official PDF: https://openairdocs.org/files/sha256/27/8a/278ad092a75b6966a4b2af654d04076e04c6b370f8b5cfe8a760dcec1cd78902 (from https://www.govinfo.gov/content/pkg/FR-2001-06-25/pdf/01-15797.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/06/25/01-15797/airworthiness-directives-bell-helicopter-textron-canada-model-206l-4-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8D3CD2A60CD4A26086256A780067C064.0001
- Page: https://openairdocs.org/proposed/2000-SW-37-AD

## Summary

This document proposes adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 206L-4 helicopters. This proposal would require installing a high altitude tail rotor static stop yield indicator (indicator) to allow operators to detect excessive bending loads sustained by the tail rotor yoke. A preflight check of the indicator would also be required. This proposal is prompted by a determination that a tail rotor yoke with a high altitude rotor system is susceptible to a static and dynamic overload. Static overload could occur after the tail rotor yoke sustains an excessive bending load due to a strike from a ground vehicle. Dynamic overload could occur as a result of a hard landing. The actions specified by the proposed AD are intended to prevent failure of the tail rotor yoke in flight and subsequent loss of control of the helicopter.

## Notices in this docket

- Jun 25, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-15797, comments due Aug 24, 2001 (https://www.federalregister.gov/documents/2001/06/25/01-15797/airworthiness-directives-bell-helicopter-textron-canada-model-206l-4-helicopters)

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