# Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters
> **Rule** · Final rule. · Published 2020-12-28 · Effective 2021-02-01 · 85 FR 84201
## Document
- **Document number:** 2020-28385
- **Category:** airworthiness
- **Manufacturer:** Sikorsky
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 84201
- **Publication date:** 2020-12-28
- **Effective date:** 2021-02-01
- **FAA docket:** Docket No. FAA-2020-0792
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters. This AD was prompted by seven incidents of fatigue cracks in the horizontal stabilizer root fitting FWD (forward root fitting). This AD requires 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. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/12/28/2020-28385/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)
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