# Proposed AD FAA-2016-0733: Robinson Helicopter Company Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-26-04
- Products: Robinson Helicopter
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 27, 2016, 81 FR 33609
- Comments due: July 26, 2016
- Became: [AD 2016-26-04](https://openairdocs.org/ad/2016-26-04)
- Docket: FAA-2016-0733 (https://www.regulations.gov/docket/FAA-2016-0733, where comments are filed)
- Project: 2015-SW-040-AD
- FR document: 2016-12442
- Official PDF: https://openairdocs.org/files/sha256/7f/61/7f614d08b7cc197fec7d7d3cbc88be4972303729797109784155a2adf44d4dfc (from https://www.govinfo.gov/content/pkg/FR-2016-05-27/pdf/2016-12442.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/05/27/2016-12442/airworthiness-directives-robinson-helicopter-company-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4B779AEB7423AA2F86257FC0004C71FE.0001
- Page: https://openairdocs.org/proposed/FAA-2016-0733

## Summary

We propose to adopt a new airworthiness directive (AD) for Robinson Helicopter Company (Robinson) Model R44, R44 II, and R66 helicopters. This proposed AD would require a visual inspection of the main rotor blade (MRB) and either removing or altering it. This proposed AD is prompted by a report that a fatigue crack was found at an MRB's trailing edge and a determination that some MRBs may have reduced blade thickness due to blending out corrosion. The proposed actions are intended to prevent an MRB fatigue crack, which could lead to MRB failure and subsequent loss of helicopter control.

## Notices in this docket

- May 27, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-12442, comments due Jul 26, 2016 (https://www.federalregister.gov/documents/2016/05/27/2016-12442/airworthiness-directives-robinson-helicopter-company-helicopters)

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