# Special Conditions: ALOFT AeroArchitects, Gulfstream Aerospace Corporation Model G-IV, GIV-X, GV, and GV-SP Airplanes; Rechargeable Lithium Batteries and Battery System Installations
> **Rule** · Final special conditions; request for comments. · Published 2026-04-16 · Effective 2026-04-16 · 91 FR 20317
## Document
- **Document number:** 2026-07483
- **Category:** other
- **Type:** Rule
- **Action:** Final special conditions; request for comments.
- **Citation:** 91 FR 20317
- **Publication date:** 2026-04-16
- **Effective date:** 2026-04-16
- **FAA docket:** Docket No. FAA-2026-3490
## Abstract

These special conditions are issued for the Gulfstream Aerospace Corporation (Gulfstream) Model G-IV, GIV-X, GV, and GV-SP series airplanes, as modified by ALOFT AeroArchitects (ALOFT). These airplanes will have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport-category airplanes. This design feature is a main ship rechargeable lithium battery. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/04/16/2026-07483/special-conditions-aloft-aeroarchitects-gulfstream-aerospace-corporation-model-g-iv-giv-x-gv-and)
---
*AI Analytics · CC0 1.0*