On large aircraft, braked wheel assemblies are normally inflated with
- nitrogen.
- nitrogen and not more than 5% of air.
- an argon and CO2 mixture.
Explanation
Large-aircraft tyres are inflated with nitrogen because it is dry and inert, so it will not support combustion if a brake overheats or a fuse plug releases, and its low moisture content avoids pressure changes and corrosion. Using air would introduce oxygen and the risk of a tyre fire or explosion near hot brakes.
soonhchong asking:
refer to JAR 25.733 Tyres (e)
tyres mounted on brakedwheels must be inflated with dry nitrogen or other gases shown to be inert so that the gas mixture inthe tyre does not contain oxygen in excess of 5% by volume..
nitrogen and not more than 5% of air, will be more correct?
Community Comments (1)
K
karol288 Posts: 7 24.06.2025 / 11:02
The same question was before and correct answer there is Nitrogen and not more than 5% of air
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