# Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters
> **Rule** · Final rule. · Published 2019-10-04 · Effective 2019-11-08 · 84 FR 53008
## Document
- **Document number:** 2019-21564
- **Category:** airworthiness
- **Manufacturer:** Sikorsky
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 84 FR 53008
- **Publication date:** 2019-10-04
- **Effective date:** 2019-11-08
- **FAA docket:** Docket No. FAA-2019-0389
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2018-10-07 for Sikorsky Aircraft Corporation (Sikorsky) Model S-76C helicopters. AD 2018-10-07 required inspecting the engine collective position transducer (CPT). This new AD retains the requirements of AD 2018-10-07 and expands the applicability. This AD is prompted by the determination that an additional part-numbered engine CPT is affected by the same unsafe condition. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2019/10/04/2019-21564/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)
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