# Proposed AD FAA-2017-1105: Bell Helicopter Textron Canada Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2019-23-09
- Products: Bell Helicopter Textron Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 1, 2018, 83 FR 25408
- Comments due: July 31, 2018
- Became: [AD 2019-23-09](https://openairdocs.org/ad/2019-23-09)
- Docket: FAA-2017-1105 (https://www.regulations.gov/docket/FAA-2017-1105, where comments are filed)
- FR document: 2018-11445
- Official PDF: https://openairdocs.org/files/sha256/6c/1d/6c1dce8483cf1e37a6eb003c5b2bfdd384419c6fbeffb0e3715d0fa7622d7ad6 (from https://www.govinfo.gov/content/pkg/FR-2018-06-01/pdf/2018-11445.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/06/01/2018-11445/airworthiness-directives-bell-helicopter-textron-canada-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B9473E3A3FC214D28625829F00497F0D.0001
- Page: https://openairdocs.org/proposed/FAA-2017-1105

## Summary

We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 427 helicopters. This proposed AD would require inspecting the inboard skin of the vertical fin around the four tailboom attachment points. This proposed AD is prompted by reports of cracked vertical fin skins that resulted from metal fatigue. The actions of this proposed AD are intended to prevent an unsafe condition on these products.

## Notices in this docket

- Jun 1, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-11445, comments due Jul 31, 2018 (https://www.federalregister.gov/documents/2018/06/01/2018-11445/airworthiness-directives-bell-helicopter-textron-canada-helicopters)

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