At what temperature do modern aircraft wheels equipped with fusible plugs automatically deflate the tires?

Modern aircraft wheels equipped with fusible plugs are designed to enhance safety by automatically deflating tires when they reach critical temperatures. The correct range for this automatic deflation is between 300 degrees Fahrenheit and 400 degrees Fahrenheit.

This mechanism helps prevent tire blowouts and reduces the risk of fire during operations, particularly in situations where the tires may become overheated due to factors like prolonged braking on landing or taxiing. The fusible plug, which is typically made from a low-melting-point metal, will melt at these temperatures, allowing the air inside the tire to escape safely, thereby reducing the pressure and minimizing the risk associated with overheated tires.

Such a safety feature is crucial in maintaining the integrity of the aircraft's landing gear and ensuring the overall safety of the aircraft and its occupants. Other temperature ranges mentioned in the options do not trigger the fusible plug and thus lack the safety effectiveness of the correct range.