Cessna Aircraft Company was established in 1927 and manufactures a range of aircraft for the private and business sectors. Cessna is perhaps best known for the 172, a single-engine piston airplane that is one of the most popular trainers of all time. Cessna also manufactures the Citation business jet and the Caravan, a freight and passenger utility aircraft. The company continues to develop piston as well as jet engine airplanes. In September of 2006, the Federal Aviation Administration approved type rating certification for the proposed Cessna Mustang which will be the world’s first entry level business jet. Cessna reports that in 2005 they delivered 1,157 aircraft with revenues of about $3.5 billion.