A comprehensive certification flight-test program includes wet-runway, low- and moderate-energy rejected takeoffs (RTO) and performance landings. A maximum-energy RTO is a dramatic test that involves accelerating an airplane with fully worn brakes to a takeoff speed of nearly 200 mph, and bringing it to a complete stop using only the brakes and the wing spoilers. Engine thrust reversers are not used to help slow down the airplane in this test. The brakes glow orange-red and reach temperatures of more than 3,500 degrees Fahrenheit from the energy absorbed while halting the airplane. Shortly after the stop, wheel fuse plugs melt to safely release tire pressure.