# Proposed AD 2000-SW-67-AD: Robinson Helicopter Company Model R44 Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-20-18
- Products: Robinson Helicopter
- Product type: Propeller
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 25, 2001, 66 FR 33653
- Comments due: August 24, 2001
- Became: [AD 2001-20-18](https://openairdocs.org/ad/2001-20-18)
- Docket: 2000-SW-67-AD
- FR document: 01-15795
- Official PDF: https://openairdocs.org/files/sha256/68/e6/68e64cc0d84c8dc6a5ea12ec9dc06fc61b63d0f06a48bd630b2381522c56e4e4 (from https://www.govinfo.gov/content/pkg/FR-2001-06-25/pdf/01-15795.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/06/25/01-15795/airworthiness-directives-robinson-helicopter-company-model-r44-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1E1EEADDE0909FAB86256A780067C46B.0001
- Page: https://openairdocs.org/proposed/2000-SW-67-AD

## Summary

This document proposes adopting a new airworthiness directive (AD) for Robinson Helicopter Company (RHC) Model R44 helicopters. This proposal would require establishing a life limit of 2200 hours time-in-service (TIS) for affected horizontal stabilizers. This proposal is prompted by engineering analysis, which indicates that certain vertical-to-horizontal stabilizer attach channels (channels) will crack sooner than the original life limit of the horizontal stabilizer. The actions specified by the proposed AD are intended to prevent a crack through a channel, separation of the stabilizers, and subsequent loss of directional control of the helicopter.

## Notices in this docket

- Jun 25, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-15795, comments due Aug 24, 2001 (https://www.federalregister.gov/documents/2001/06/25/01-15795/airworthiness-directives-robinson-helicopter-company-model-r44-helicopters)

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