# Proposed AD FAA-2020-0791: Sikorsky Aircraft Corporation Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-04-16
- Products: Sikorsky
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 8, 2020, 85 FR 55388
- Comments due: October 23, 2020
- Became: [AD 2021-04-16](https://openairdocs.org/ad/2021-04-16)
- Docket: FAA-2020-0791 (https://www.regulations.gov/docket/FAA-2020-0791, where comments are filed)
- Project: AD-2020-00676-R
- FR document: 2020-19709
- Official PDF: https://openairdocs.org/files/sha256/e5/ad/e5ad8efa4f3351653265d33af4e3c9bfbfd8af38a241b9b11e7c8eab4464c2d9 (from https://www.govinfo.gov/content/pkg/FR-2020-09-08/pdf/2020-19709.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/09/08/2020-19709/airworthiness-directives-sikorsky-aircraft-corporation-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0736828C88CECEAC862585DD0042F480.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0791

## 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 the manufacturer discovering non-conforming threads, resulting in a life limit reduction on multiple landing gear components including threaded hinge pins and main landing gear (MLG) and nose landing gear (NLG) actuator pins. This proposed AD would require a one-time inspection of the landing gear for components with non-conforming threads and removal of any nonconforming threaded hinge pin and MLG and NLG actuator pin. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 8, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-19709, comments due Oct 23, 2020 (https://www.federalregister.gov/documents/2020/09/08/2020-19709/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)

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