The Evergreen International Aviation Company of the USA has modified a Boeing 747-300 widebody aircraft into a fire fighting aircraft. It has a capacity of 20,500 US gallons (77,600 litres) more than 8 times that of the commonly used P-3A Orion aircraft and is the largest fire fighting aircraft in the world. It was first used operationally in July 2009 to fight huge fires in Cuenca, Spain.