FAA Sets Lithium Battery Rules for Fancy Gulfstream Jets
Published Date: 4/16/2026
Rule
Summary
The FAA is setting new safety rules for Gulfstream G-IV, GIV-X, GV, and GV-SP airplanes modified by ALOFT AeroArchitects because they use rechargeable lithium batteries, which need extra care. These special conditions make sure the batteries are just as safe as older tech. The rules kick in on April 16, 2026, and folks can send comments until June 1, 2026.
Analyzed Economic Effects
1 provisions identified: 0 benefits, 1 costs, 0 mixed.
New Lithium-Battery Safety Rules for Gulfstreams
The FAA issued special conditions effective April 16, 2026, for ALOFT AeroArchitects’ supplemental type certificate to install a main-ship rechargeable lithium battery on Gulfstream Model G‑IV, GIV‑X, GV, and GV‑SP airplanes. The rule requires the battery and battery system to meet nine safety requirements, including: maintain safe cell temperatures and pressures; prevent thermal propagation and automatically control charge rate; not emit explosive or toxic gases; meet the flammable-fluid fire-protection standard in §25.863; avoid damage from corrosive fluids or gases; prevent hazardous heating effects; provide failure sensing and warning for the flightcrew; monitor and warn when charge state is too low if required for safe flight; and automatically disconnect from the charger on over-temperature or cell/battery failure.
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