# Proposed AD FAA-2021-0689: Sikorsky Aircraft Corporation Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-02-01
- Products: Sikorsky
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 23, 2021, 86 FR 47041
- Comments due: October 7, 2021
- Became: [AD 2022-02-01](https://openairdocs.org/ad/2022-02-01)
- Docket: FAA-2021-0689 (https://www.regulations.gov/docket/FAA-2021-0689, where comments are filed)
- Project: AD-2020-01589-R
- FR document: 2021-17948
- Official PDF: https://openairdocs.org/files/sha256/38/e3/38e330cbe217031c2f6f3b6683c10bcf91fbf5533b92c3500c9f88a48bc68bfa (from https://www.govinfo.gov/content/pkg/FR-2021-08-23/pdf/2021-17948.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/08/23/2021-17948/airworthiness-directives-sikorsky-aircraft-corporation-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D4CF41C1ACEF07858625873A00749C83.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0689

## 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 a cracked main rotor stationary swashplate assembly (swashplate assembly). This proposed AD would require visually inspecting the swashplate assembly at specified intervals and depending on the results, removing the swashplate assembly from service. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 23, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-17948, comments due Oct 7, 2021 (https://www.federalregister.gov/documents/2021/08/23/2021-17948/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)

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