# Proposed AD FAA-2015-3820: Various Restricted Category Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-23-09
- Products: Various Restricted Category Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 11, 2016, 81 FR 21288
- Comments due: June 10, 2016
- Became: [AD 2016-23-09](https://openairdocs.org/ad/2016-23-09)
- Docket: FAA-2015-3820 (https://www.regulations.gov/docket/FAA-2015-3820, where comments are filed)
- Project: 2014-SW-024-AD
- FR document: 2016-07985
- Official PDF: https://openairdocs.org/files/sha256/1d/55/1d55a8674158c732865d9488193b1efa3765d72e3d5196010f67077e199a311c (from https://www.govinfo.gov/content/pkg/FR-2016-04-11/pdf/2016-07985.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/04/11/2016-07985/airworthiness-directives-various-restricted-category-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D6875F1AA864D87186257F92005073B8.0001
- Page: https://openairdocs.org/proposed/FAA-2015-3820

## Summary

We propose to adopt a new airworthiness directive (AD) for various restricted category helicopters. This proposed AD would require cleaning and visually inspecting certain main rotor (M/R) blades and, depending on the outcome of the inspections, repairing or replacing the M/R blades. This proposed AD is prompted by a report of an M/R blade with multiple fatigue cracks around the blade retention bolt hole. The proposed actions are intended to detect a crack in the M/R blade, and prevent failure of the M/R blade and subsequent loss of helicopter control.

## Notices in this docket

- Apr 11, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-07985, comments due Jun 10, 2016 (https://www.federalregister.gov/documents/2016/04/11/2016-07985/airworthiness-directives-various-restricted-category-helicopters)

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