What is the maximum temperature for operating brake deice?

The correct answer indicates that the maximum temperature for operating brake deice is 15°C. This temperature threshold is crucial for ensuring the effective functioning of the brake deice system, which is designed to prevent the buildup of ice on the brakes, particularly in cold weather conditions.

When operating the brake deice system at temperatures higher than this limit, the effectiveness of the deice system can diminish. Ice formation on brakes can lead to reduced braking efficiency, posing significant risks during landing and taxi operations. By adhering to the 15°C limit, pilots can maintain optimal performance and safety standards, as the system is designed to be effective and beneficial within this operational temperature range.

Choosing any temperature above this range may compromise the system's ability to prevent ice buildup, which is why it is essential to operate within the provided limits. This consideration directly ties into safe operating practices and the maintenance of aircraft performance standards.