# Airworthiness Directives; Gulfstream Aerospace LP Airplanes
> **Rule** · Final rule. · Published 2021-09-09 · Effective 2021-10-14 · 86 FR 50451
## Document
- **Document number:** 2021-19389
- **Category:** airworthiness
- **Manufacturer:** Gulfstream Aerospace LP
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 50451
- **Publication date:** 2021-09-09
- **Effective date:** 2021-10-14
- **FAA docket:** Docket No. FAA-2021-0459
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Gulfstream Aerospace LP Model Gulfstream G280 airplanes. This AD was prompted by a report that during full-scale fatigue testing, a crack was found in the area of the attachment of the wing rib 0 to the front spar. This AD requires non-destructive testing on the forward (front) spar vertical stiffener and rib 0 for any cracking, installation of a doubler to the forward (front) spar and rib 0 attachment, and repair if necessary, as specified in a Civil Aviation Authority of Israel (CAAI) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/09/09/2021-19389/airworthiness-directives-gulfstream-aerospace-lp-airplanes)
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