<Table> <Tr> <Th_colspan="2"> Boeing 737 </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> A Boeing 737 - 200, the first mass - produced 737 model, in operation with South African Airlink in 2007 </Td> </Tr> <Tr> <Th> Role </Th> <Td> Narrow - body jet airliner and Business jet </Td> </Tr> <Tr> <Th> National origin </Th> <Td> United States </Td> </Tr> <Tr> <Th> Manufacturer </Th> <Td> Boeing Commercial Airplanes </Td> </Tr> <Tr> <Th> First flight </Th> <Td> April 9, 1967 </Td> </Tr> <Tr> <Th> Introduction </Th> <Td> February 10, 1968, with Lufthansa </Td> </Tr> <Tr> <Th> Status </Th> <Td> In service </Td> </Tr> <Tr> <Th> Primary users </Th> <Td> Southwest Airlines Ryanair United Airlines American Airlines </Td> </Tr> <Tr> <Th> Produced </Th> <Td> 1966--present </Td> </Tr> <Tr> <Th> Number built </Th> <Td> 10,000 (March 13, 2018) </Td> </Tr> <Tr> <Th> Unit cost </Th> <Td> − 100: US $32M - 200: US $5.2 M (1972) </Td> </Tr> <Tr> <Th> Variants </Th> <Td> Boeing T - 43 </Td> </Tr> <Tr> <Th> Developed into </Th> <Td> Boeing 737 Classic Boeing 737 Next Generation Boeing 737 MAX </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Boeing 737 </Th> </Tr> <Tr> <Td_colspan="2"> A Boeing 737 - 200, the first mass - produced 737 model, in operation with South African Airlink in 2007 </Td> </Tr> <Tr> <Th> Role </Th> <Td> Narrow - body jet airliner and Business jet </Td> </Tr>

Who manufactures the engines on the boeing 737