# Proposed AD FAA-2019-1115: Sikorsky Aircraft Corporation Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-16-19
- Products: Sikorsky
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 18, 2020, 85 FR 8771
- Comments due: April 3, 2020
- Became: [AD 2020-16-19](https://openairdocs.org/ad/2020-16-19)
- Docket: FAA-2019-1115 (https://www.regulations.gov/docket/FAA-2019-1115, where comments are filed)
- FR document: 2020-03072
- Official PDF: https://openairdocs.org/files/sha256/07/99/07995c5440d9dac8e1e7a5a84233935159f91df8dbe61bc5ca5c6dabf6add6a9 (from https://www.govinfo.gov/content/pkg/FR-2020-02-18/pdf/2020-03072.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/02/18/2020-03072/airworthiness-directives-sikorsky-aircraft-corporation-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/01540699EE438341862585120052FEBB.0001
- Page: https://openairdocs.org/proposed/FAA-2019-1115

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters. This proposed AD was prompted by two incidents of erroneous low oil pressure caution cockpit indications and unintended actuation of the main gearbox (MGB) auto bypass valve. This proposed AD would require installing auxiliary circuit breaker modification (MOD) kits and inserting a Rotorcraft Flight Manual (RFM) Supplement into the RFM for your helicopter. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Feb 18, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-03072, comments due Apr 3, 2020 (https://www.federalregister.gov/documents/2020/02/18/2020-03072/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)

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