# Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters
> **Rule** · Final rule; request for comments. · Published 2017-03-27 · Effective 2017-04-11 · 82 FR 15120
## Document
- **Document number:** 2017-05967
- **Category:** airworthiness
- **Manufacturer:** Sikorsky
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 82 FR 15120
- **Publication date:** 2017-03-27
- **Effective date:** 2017-04-11
- **FAA docket:** Docket No. FAA-2016-9291
## Abstract

We are adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model 269D and Model 269D Configuration A helicopters. This AD requires reducing the life limit of and inspecting certain drive shafts. This AD is prompted by four incidents involving failure of a drive shaft. The actions specified by this AD are intended to prevent the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/03/27/2017-05967/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)
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