波音737-400型是波音737-300飞机的加长型号，1985年开始研发，它和波音757型一起承担了波音727系列退役后留下的市场，主要迎合包机航空服务的需要。

The Boeing 737-400 Is a remarkable aircraft and was one of the great innovations of Boeing, increasing capacity yet keeping a relatively small and economic size. Announced in 1986, it is a twin-engine, short to medium range aircraft that has a capacity of 189 passengers.

The Boeing 737 Classic is a series of narrow-body airliners produced by Boeing Commercial Airplanes, the second generation of the Boeing 737 series of aircraft. Development began in 1979 and the first variant, the 737-300, first flew in February 1984 and entered service that December.

The First Generation 737-100/200 variants were powered by Pratt & Whitney JT8D low-bypass turbofan engines and offered seating for 85 to 130 passengers. Launched in 1980 and introduced in 1984, the Second Generation 737 Classic -300/400/500 variants were upgraded with more fuel-efficient CFM56-3 high-bypass turbofans and offered 110 to 168 seats.

The new aeroplane, the 737-400, was developed as a 150 seat class 727 replacement. Although Boeing had initially developed the 180 to 200 seat 757 to replace the successful 727, there still existed a considerable market for a near direct size replacement for the popular trijet.

2024年7月8日 · 波音737-400是一款经典的喷气式客机，其机型代码为734。 这款飞机的主要特点是其宽敞的客舱设计，标准座位数可达159人，虽然是一级典型座位量，但能够为乘客提供舒适的旅行体验。

Some 737-300s and -400s have been modified to freighters. Wingspan: 28.88 m (94 ft 9 in). Length: 33.40 m (109 ft 7 in). Height: 11.13 m (36 ft 6 in). Empty weight: 32,904 kg (72,540 lb). Max. take-off weight: 63,277 kg (139,500 lb). Passengers: 128-149. Range: 4,973km (2,685nm). Operating speed: Mach 0.745.

The Boeing 737-400 is a twin-engined short-to-medium-range narrowbody airliner with a capacity of maximum 189 passengers produced by the American manufacturer Boeing Commercial Airplanes.

The 737-300/-400/-500 is available with three different engine variants and multiple MTOW & fuel tank options. The second generation 737-300/- 400/-500 family is one of the most popular short-haul workhorses, particularly for the growing number of low-cost carriers.

2024年4月24日 · 波音737是美国波音公司于1965年开始研制的一种中短程双发喷气式客机，是世界民航历史上最成功的窄体民航客机系列之一。 也是销售时间最长的一款机型。 波音公司于1964年开始波音737设计工作，于1967年4月9日完成首飞，于1967年获得适航证和交付。