# Proposed AD 81-ASW-27: Bell Helicopter Textron, Inc. Model 206A, 206B, 206A-1, 206B-1, 206L, and 206L-1 Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 81-18-01
- Products: Bell Helicopter Textron Canada
- Product type: Aircraft
- Action: Notice of Proposed rulemaking (NPRM).
- Published: September 13, 2001, 66 FR 47600
- Comments due: November 13, 2001
- Became: [AD 81-18-01](https://openairdocs.org/ad/81-18-01)
- Docket: 81-ASW-27
- FR document: 01-22947
- Official PDF: https://openairdocs.org/files/sha256/01/1e/011eace7925d1f7b9af092377f0cfb13e782ee09a01c16f42fa1a1987bf11a18 (from https://www.govinfo.gov/content/pkg/FR-2001-09-13/pdf/01-22947.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/09/13/01-22947/airworthiness-directives-bell-helicopter-textron-inc-model-206a-206b-206a-1-206b-1-206l-and-206l-1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3E50332F32100D8086256AC6005D09A4.0001
- Page: https://openairdocs.org/proposed/81-ASW-27

## Summary

This document proposes to revise an existing airworthiness directive (AD) for Bell Helicopter Textron, Inc. (BHTI) Model 206A, 206B, 206A-1, 206B-1, 206L, and 206L-1 helicopters that currently establishes a retirement life for the main rotor trunnion based on hours time-in-service (TIS). This action would retain those requirements but would revise the AD to remove the trunnion, part number (P/N) 206-011-120-103, from the applicability. This proposal is prompted by the issuance of another AD for the BHTI Model 206L and 206L-1 helicopters that requires a different method of calculating the retirement life for the trunnions. The actions specified by this AD are intended prevent failure of the trunnion due to fatigue cracks and subsequent loss of control of the helicopter.

## Notices in this docket

- Sep 13, 2001: Notice of Proposed rulemaking (NPRM). (first notice), FR document 01-22947, comments due Nov 13, 2001 (https://www.federalregister.gov/documents/2001/09/13/01-22947/airworthiness-directives-bell-helicopter-textron-inc-model-206a-206b-206a-1-206b-1-206l-and-206l-1)

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