Overheating your engine can cause power loss, excess oil consumption, and damaging detonation. A wide range of causes can bring on the problem, from engine and fuel system mismanagement—suggesting that it's time for a pilot's operating handbook review—to fixation, or poor use of checklists.

When a plane "overheats," the consequences depend on which system is affected—usually the engines, the brakes, or the avionics. If an engine overheats (exceeding its Exhaust Gas Temperature limits), the pilots will immediately reduce the throttle or shut down the engine to prevent a catastrophic fire or turbine blade failure; modern jets are designed to fly perfectly well on the remaining engine(s). If the brakes overheat (common after a "rejected takeoff" or a heavy landing on a short runway), the ground crew must wait for them to cool down before the plane can move again, as hot brakes can catch fire or cause the tires to explode. In rare cases, "fusible plugs" in the tires will melt to release air pressure safely. If the avionics or cabin systems overheat, it is usually due to a failure in the Environmental Control System (ECS). In such cases, the pilots may descend to a lower, cooler altitude. Modern aircraft are equipped with thousands of sensors that provide real-time alerts, allowing crews to intervene long before "overheating" leads to a critical structural or mechanical emergency.