Development started after the 2002 fire season , which saw the fatal crashes of two air tankers in the United States . The accidents , involving a Lockheed C-130 Hercules and a Consolidated PB4Y-2 Privateer , prompted the US Department of Interior to issue an official request for information on next-generation airtankers
fatal crashes of two air tankers
2002 United States airtanker crashes
747 Supertanker