Stretched development of popular twin, incorporating advanced technology CFM56 engines and other improvements. First flown on 24 February 1984 and put into service by launch customer Southwest Airlines on 7 December that year.Longer and shorter derivatives added. Models now replaced by next-generation 737s. Total delivered: 1,988.
Specifications: 737-400
Accommodation: 2 + 170
Cargo/baggage: 30.2 m³(1,070 cu. ft)
Max Speed: 2,500 nm (4,633 km)
Dimensions:
Wingspan: 28.9 m (94 ft 9 in)
Length: 36.5 m (119 ft 7 in)
Height: 11.1 m (36 ft 6 in)
Features:
Low/swept wing; large twin underwing CFM56-3 turbofans; swept tailfin with dorsal fin and low-set tailplane.