# Proposed AD FAA-2016-6551: Bell Helicopter Textron Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-21-01
- Products: Bell Helicopter Textron
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 10, 2016, 81 FR 28766
- Comments due: July 11, 2016
- Became: [AD 2016-21-01](https://openairdocs.org/ad/2016-21-01)
- Docket: FAA-2016-6551 (https://www.regulations.gov/docket/FAA-2016-6551, where comments are filed)
- Project: 2013-SW-070-AD
- FR document: 2016-10860
- Official PDF: https://openairdocs.org/files/sha256/49/3f/493f584a851d988264e6e0781b5e5492892ded7d7438d8151e6353320fd8b71c (from https://www.govinfo.gov/content/pkg/FR-2016-05-10/pdf/2016-10860.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/05/10/2016-10860/airworthiness-directives-bell-helicopter-textron-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/44E82AF86900457486257FAF004AF05B.0001
- Page: https://openairdocs.org/proposed/FAA-2016-6551

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Bell Helicopter Textron (Bell) Model 430 helicopters. This proposed AD would require establishing a life limit for a certain main rotor hub attachment bolt (bolt) and removing from service each bolt that has met or exceeded its life limit. This proposed AD is prompted by a documentation error that omitted the life limit of a certain part- numbered bolt from the Airworthiness Limitations section of the maintenance manual. The proposed actions are intended to establish a life limit for a certain part-numbered bolt to prevent failure of a bolt, failure of a main rotor hub, and subsequent loss of control of a helicopter.

## Notices in this docket

- May 10, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-10860, comments due Jul 11, 2016 (https://www.federalregister.gov/documents/2016/05/10/2016-10860/airworthiness-directives-bell-helicopter-textron-helicopters)

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