# Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes
> **Rule** · Final rule. · Published 2017-12-21 · Effective 2018-01-25 · 82 FR 60505
## Document
- **Document number:** 2017-27441
- **Category:** airworthiness
- **Manufacturer:** Gulfstream Aerospace Corporation
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 60505
- **Publication date:** 2017-12-21
- **Effective date:** 2018-01-25
- **FAA docket:** Docket No. FAA-2017-0910
## Abstract

We are adopting a new airworthiness directive (AD) for certain Gulfstream Aerospace Corporation Models G-1159A (GIII), G-IV, and GIV-X airplanes. This AD was prompted by a report that certain flap tracks were manufactured with the upper flange thickness less than design minimum. This AD requires replacing any defective flap track. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/12/21/2017-27441/airworthiness-directives-gulfstream-aerospace-corporation-airplanes)
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