# Proposed AD FAA-2020-0212: Sikorsky Aircraft Corporation Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-15-17
- Products: Sikorsky
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 6, 2020, 85 FR 19110
- Comments due: May 21, 2020
- Became: [AD 2020-15-17](https://openairdocs.org/ad/2020-15-17)
- Docket: FAA-2020-0212 (https://www.regulations.gov/docket/FAA-2020-0212, where comments are filed)
- FR document: 2020-07047
- Official PDF: https://openairdocs.org/files/sha256/c4/7b/c47b6797bb933b4afd05206267aa9f085c6af8843fd809ef0e6bb1ac9d406a82 (from https://www.govinfo.gov/content/pkg/FR-2020-04-06/pdf/2020-07047.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/04/06/2020-07047/airworthiness-directives-sikorsky-aircraft-corporation-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6FF9F9DA03C9D257862585420042BB0D.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0212

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Sikorsky Aircraft Corporation Model S-76C helicopters. This proposed AD was prompted by reports of inaccurate main gear box (MGB) indications in flight. This proposed AD would require updating the remote data acquisition unit (RDAU) software and re-identifying the RDAU and, for certain helicopters, updating the software of the display unit (DU) and re-identifying the DU. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Apr 6, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-07047, comments due May 21, 2020 (https://www.federalregister.gov/documents/2020/04/06/2020-07047/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.