# Airworthiness Directives; Sikorsky Aircraft Corporation
> **Rule** · Final rule. · Published 2018-05-21 · Effective 2018-06-25 · 83 FR 23355
## Document
- **Document number:** 2018-10581
- **Category:** airworthiness
- **Manufacturer:** Sikorsky
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 23355
- **Publication date:** 2018-05-21
- **Effective date:** 2018-06-25
- **FAA docket:** Docket No. FAA-2017-0874
## Abstract

We are adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-76C helicopters. This AD requires inspecting the engine collective position transducer (CPT). This AD was prompted by reports of wear of the CPT that has resulted in several One Engine Inoperative (OEI) incidents. The actions of this AD are intended to detect and prevent an unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/05/21/2018-10581/airworthiness-directives-sikorsky-aircraft-corporation)
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