# Proposed AD FAA-2017-0874: Sikorsky Aircraft Corporation Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-10-07
- Products: Sikorsky
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 14, 2017, 82 FR 43195
- Comments due: November 13, 2017
- Became: [AD 2018-10-07](https://openairdocs.org/ad/2018-10-07)
- Docket: FAA-2017-0874 (https://www.regulations.gov/docket/FAA-2017-0874, where comments are filed)
- FR document: 2017-19450
- Official PDF: https://openairdocs.org/files/sha256/66/85/6685b359866bd2a0deacac59958890fb91253d34550d3ea7d12813e6cc9f6ca0 (from https://www.govinfo.gov/content/pkg/FR-2017-09-14/pdf/2017-19450.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/09/14/2017-19450/airworthiness-directives-sikorsky-aircraft-corporation-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B0BD405227D53DB28625819B0060D453.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0874

## Summary

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

## Notices in this docket

- Sep 14, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-19450, comments due Nov 13, 2017 (https://www.federalregister.gov/documents/2017/09/14/2017-19450/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)

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