What should be immediately done when there is a wheel brake failure?

When there is a wheel brake failure, the immediate action of evacuating the area of unnecessary personnel is crucial for ensuring safety. This response helps mitigate risks associated with any potential hazards that may arise from a malfunctioning braking system, such as the possibility of the aircraft rolling uncontrollably or even experiencing a fire if there are hot brakes involved.

By clearing the area of non-essential personnel, you help protect individuals who might otherwise be at risk from the malfunctioning aircraft. This preventive measure establishes a safer environment and allows maintenance crew or emergency response teams to work effectively without distractions or additional risks to personnel safety.

Taking such immediate steps ensures that the situation is managed effectively while enabling the necessary procedures to be executed without further complications. Other actions such as notifying the flight crew or initiating checks might be part of the overall response but are secondary to ensuring the immediate safety of those in the vicinity.