# Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes
> **Rule** · Final rule. · Published 2017-10-02 · Effective 2017-11-06 · 82 FR 45705
## Document
- **Document number:** 2017-20831
- **Category:** airworthiness
- **Manufacturer:** Gulfstream Aerospace Corporation
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 45705
- **Publication date:** 2017-10-02
- **Effective date:** 2017-11-06
- **FAA docket:** Docket No. FAA-2016-9522
## Abstract

We are superseding Airworthiness Directive (AD) 2009-17-01, which applied to certain Gulfstream Model G-IV, GIV-X, GV-SP airplanes and Model GV airplanes. AD 2009-17-01 required an inspection for sealant applied to the exterior of the auxiliary power unit (APU) enclosure (firewall), and a revision of the airplane flight manual (AFM), as applicable. This AD requires revising the AFM and revising the applicability to include additional airplanes. This AD was prompted by a report indicating that the type design sealant applied to the APU enclosure failed certain tests. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/10/02/2017-20831/airworthiness-directives-gulfstream-aerospace-corporation-airplanes)
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