Taken from the A380 AMM:
WARNING: LET THE BRAKES AND THE WHEELS BECOME COOL BEFORE YOU GO NEAR THE LANDING
GEAR. DO NOT APPLY A LIQUID OR GAS FIRE EXTINGUISHER DIRECTLY ON A HOT WHEEL
OR BRAKE UNIT. IF YOU DO NOT OBEY THESE PRECAUTIONS, THERE IS A RISK OF EXPLOSION.
A. Safety Precautions
(1) Instructions after a brake overheat
(a) If a tire is inflated, do not go near the area around the wheel for approximately one hour. When you go near, go from the front or from the rear and not from the side of the wheel.
(b) Unless there is a fire, do not apply the extinguishing agent (liquid, water, mist, foam, etc.) with a spray gun on a hot tire if it is inflated.
Extinguishing agent on hot wheels can:
- Increase the time necessary for the fusible plug(s) to melt
- Prevent operation of the fusible plug(s).
You must let the brake become cool for a minimum of one hour or use the brake cooling fans (if installed).