What happens if only the left side brakes fail?

The scenario of left side brake failure typically leads to a situation where the braking system is compromised. In most aircraft, the braking system is designed to provide balanced stopping power and control. If the left side brakes fail, the aircraft may be unable to achieve adequate braking performance, especially during landing or taxiing.

The right side brakes may still function normally; however, relying solely on a single side for braking can lead to undesirable outcomes, such as difficulty controlling the aircraft. This lack of effective braking on one side can result in loss of directional control or increased stopping distances.

Thus, in this context, if only the left side brakes fail, the overall braking capability is severely impacted, making it impossible to stop effectively using just the right side. Therefore, the correct understanding here is that if one side of the braking system fails, both sides may not be able to work together to achieve the necessary stopping power, leading to the conclusion that both brakes would be effectively inoperative in practical applications.