# Proposed AD FAA-2020-0792: Sikorsky Aircraft Corporation Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-26-13
- Products: Sikorsky
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 17, 2020, 85 FR 58007
- Comments due: November 2, 2020
- Became: [AD 2020-26-13](https://openairdocs.org/ad/2020-26-13)
- Docket: FAA-2020-0792 (https://www.regulations.gov/docket/FAA-2020-0792, where comments are filed)
- FR document: 2020-20482
- Official PDF: https://openairdocs.org/files/sha256/66/58/6658685c7d70e7c463759924c0e7904748b95957a107d72c747f12ab557f1f08 (from https://www.govinfo.gov/content/pkg/FR-2020-09-17/pdf/2020-20482.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/09/17/2020-20482/airworthiness-directives-sikorsky-aircraft-corporation-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D36493BDC2CEDCA9862585E60049347F.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0792

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters. This proposed AD was prompted by seven incidents of fatigue cracks in the horizontal stabilizer root fitting FWD (forward root fitting). This proposed AD would require establishing the life limit of certain part- numbered forward root fittings, establishing the life limit of certain part-numbered stabilizer strut fittings, repetitively inspecting certain parts, and depending on the inspection results, removing parts from service. This proposed AD would also prohibit the installation of certain parts. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 17, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-20482, comments due Nov 2, 2020 (https://www.federalregister.gov/documents/2020/09/17/2020-20482/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)

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