# Proposed AD FAA-2005-21679: Robinson Helicopter Company Model R22 Series Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Withdrawn
- Products: Robinson Helicopter
- Product type: Aircraft
- Action: Proposed rule; withdrawal.
- Published: February 25, 2021, 86 FR 11476
- Comments due: February 24, 2021
- Docket: FAA-2005-21679 (https://www.regulations.gov/docket/FAA-2005-21679, where comments are filed)
- Project: 2004-SW-33-AD
- FR document: 2021-03655
- Official PDF: https://openairdocs.org/files/sha256/b1/ec/b1ec3af6521394cf4e34c6f70751edaea6345c4c22a48e8783e06e5bb273b663 (from https://www.govinfo.gov/content/pkg/FR-2021-02-25/pdf/2021-03655.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/02/25/2021-03655/airworthiness-directives-robinson-helicopter-company-model-r22-series-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/098341FC773EDB21862586870070402F.0001
- Page: https://openairdocs.org/proposed/FAA-2005-21679

## Summary

The FAA is withdrawing a notice of proposed rulemaking (NPRM) that proposed to adopt a new airworthiness directive (AD) that would have applied to Robinson Helicopter Company (RHC) Model R22 series helicopters. The NPRM was prompted by an in-flight break up of a helicopter on which both teeter stop brackets (brackets) failed. The NPRM would have required replacing each main rotor blade (blade) droop and teeter stop (stop) and bracket and associated hardware with redesigned and improved airworthy parts. Since issuance of the NPRM, the FAA has determined that failure of the brackets was caused by turbulence and other factors that are addressed in AD 95-26-04. Accordingly, the NPRM is withdrawn.

## Notices in this docket

- Jun 28, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-12688, comments due Aug 29, 2005 (https://www.federalregister.gov/documents/2005/06/28/05-12688/airworthiness-directives-robinson-helicopter-company-model-r22-series-helicopters)
- Feb 25, 2021: Proposed rule; withdrawal., FR document 2021-03655, comments due Feb 24, 2021 (https://www.federalregister.gov/documents/2021/02/25/2021-03655/airworthiness-directives-robinson-helicopter-company-model-r22-series-helicopters)

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