Boeing 737-400 is a Twin-Engined



The Boeing 737-400 is a Twin-Engined short-to-medium-range Narrowbody Airliner with a capacity of maximum 188 
passengers Produced by the American manufacturer Boeing Commercial Airplanes.The Boeing 737-400 is together with the 737-300 and the 737-500 member of the Classic-737-Family.
The 737-400 Design was launched in 1985 to fill the gap between the 737-300 and the 757-200, and competed with the Airbus A320 and McDonnell Douglas MD-80. It stretched the 737-300 another 10 ft (3.45 m) to carry up to 188 passengers. It included a Tail Bumper to prevent tailscrapes during take-off (an early issue with the 757), and a strengthened wing spar. 

The prototype rolled out on January 26, 1988, and flew for the first time on 19 February 1988. The Aircraft entered service on September 15, 1988, with launch customer Piedmont Airlines (25 aircraft ordered). The 737-400F was not a Model delivered by Boeing, but a 737-400 converted to Freighter. The Boeing 737-400 never included Winglets as an option, just like the Boeing 737-600. Alaska Airlines was the first to convert one of their 400s from regular service to an Aircraft with the ability to handle ten pallets. The Airline has also converted five more into fixed combi Aircraft for half passenger and freight. These 737-400 Combi Aircraft are now in service.

The Aircraft has allowed Airlines to provide domestic routes and short-range International Flights for over 30 years. The Design of the next-generation family of 737s began in 1991 and the newest 737s provide
Transcontinental and medium-
range International flights. The Boeing 737 Next Generation is the name given to the -600 / -700 / -800 / -900 series of the Boeing 737, after the introduction of the -300 / -400 / -500 Classic series.Over 3,000 Aircraft of the first generation of 737s, which first flew in 1967, were built until the production run was completed in 2000.


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