# Proposed AD 2000-SW-01-AD: Bell Helicopter Textron Inc.-Manufactured Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P; and Southwest Florida Aviation SW204, SW204HP, SW205, and SW205A-1 Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-15-21
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 24, 2000, 65 FR 15882
- Comments due: May 8, 2000
- Became: [AD 2000-15-21](https://openairdocs.org/ad/2000-15-21)
- Docket: 2000-SW-01-AD
- FR document: 00-7339
- Official PDF: https://openairdocs.org/files/sha256/64/20/6420c04720a2503088738d13906e4a9a01425ccb487e2ec66a988985ddedde74 (from https://www.govinfo.gov/content/pkg/FR-2000-03-24/pdf/00-7339.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/03/24/00-7339/airworthiness-directives-bell-helicopter-textron-inc-manufactured-model-hh-1k-th-1f-th-1l-uh-1a
- Page: https://openairdocs.org/proposed/2000-SW-01-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) applicable to Bell Helicopter Textron Inc. (BHTI)- manufactured Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH- 1H, UH-1L, and UH-1P; and Southwest Florida Aviation SW204, SW204HP, SW205, and SW205A-1 helicopters. This AD would require removing and replacing certain main rotor mast (mast) assemblies. This proposal is prompted by the crash of a BHTI-manufactured Model UH-1B due to failure of a thin-wall mast installed on the helicopter. The actions specified by the proposed AD are intended to prevent fatigue failure of the mast and subsequent loss of control of the helicopter.

## Notices in this docket

- Mar 24, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-7339, comments due May 8, 2000 (https://www.federalregister.gov/documents/2000/03/24/00-7339/airworthiness-directives-bell-helicopter-textron-inc-manufactured-model-hh-1k-th-1f-th-1l-uh-1a)

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