The wheel well is landing gear compartment, also known as wheel bay. There are some reasons that may contribute to wheel fire. Overheated brakes can contribute to a wheel well fire if they become hot enough to ignite the tires, hydraulic fluid or other flammable substances. However, analysis by Boeing indicates that overheated brakes alone cannot generate enough heat to trigger the wheel well fire detection system. Should wheel well fire take place, some actions should be taken by pilots. In most cases extending the gear to cool the brakes and wheel well is effective at coping with the fire condition. Even so there have been a few incidents where extending the gear did not resolve the problem. One such example was an incident where the electrical lead to a hydraulic pump shorted and burned a small hole through the hydraulic pressure line and ignited the spraying fluid. After the gear was extended, the fire warning went out but the fluid from the hydraulic line continued to burn. Wheel well fire indications should be treated with the same respect as other fire indications. This includes the requirement to land at the nearest suitable airport. The landing gear should be left extended unless it is absolutely necessary to retract it in order to reach for performance considerations.