The DC-10 Air Tanker is a series of American wide-body jet air tankers, which have been in service as an aerial firefighting unit since 2006. The aircraft, operated by the joint technical venture 10 Tanker Air Carrier, are converted wide body McDonnell Douglas DC-10 passenger jetliners, and are primarily used to fight wildfires, typically in rural areas. The turbofan-powered aircraft carry up to 12,000 US gallons (45,000 liters) of water or fire retardant in an exterior belly-mounted tank, the contents of which can be released in eight seconds. Two air tankers are currently in operation, with the call-signs Tanker 911 and Tanker 912. A third, Tanker 910, was retired in 2014.
