# Proposed AD FAA-2017-0141: The Enstrom Helicopter Corporation

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-02-01
- Products: Enstrom Helicopter Corporation, The
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 2, 2017, 82 FR 12308
- Comments due: May 1, 2017
- Became: [AD 2018-02-01](https://openairdocs.org/ad/2018-02-01)
- Docket: FAA-2017-0141 (https://www.regulations.gov/docket/FAA-2017-0141, where comments are filed)
- Project: 2016-SW-067-AD
- FR document: 2017-03950
- Official PDF: https://openairdocs.org/files/sha256/6a/55/6a557be228b9901c0b26777fcc2ed468594cbaf8a67789b2a6f94a076ea69191 (from https://www.govinfo.gov/content/pkg/FR-2017-03-02/pdf/2017-03950.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/03/02/2017-03950/airworthiness-directives-the-enstrom-helicopter-corporation
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C33E710A6DF10E2D862580D7005B36EE.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0141

## Summary

We propose to supersede airworthiness directive (AD) 2015-08- 51 for Enstrom Helicopter Corporation (Enstrom) Model F-28A, 280, F- 28C, F-28C-2, F-28C-2R, 280C, F-28F, F-28F-R, 280F, 280FX, and 480 helicopters. AD 2015-08-51 requires an inspection of the main rotor spindle (spindle) and reporting the inspection results to the FAA. This proposed AD was prompted by additional reports of cracked spindles and would require establishing a life limit and a recurring inspection. These proposed actions are intended to prevent the unsafe condition on these products.

## Notices in this docket

- Mar 2, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-03950, comments due May 1, 2017 (https://www.federalregister.gov/documents/2017/03/02/2017-03950/airworthiness-directives-the-enstrom-helicopter-corporation)

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