Boeing
Boeing 737-400
734
B734
Out of Production
The Boeing 737-400 is the stretched member of the 737 Classic series, extending the 737-300 fuselage by about three metres to raise capacity. It seats about 146 passengers in two classes and up to 188 single-class, with two CFM56-3C1 turbofans giving a range near 5,000 km at 793 km/h. First flown in 1988, the -400 is 36.5 metres long with a 28.9-metre wingspan and a maximum takeoff weight of 62,820 kg. The added length made it the highest-capacity Classic, suited to busier short- and medium-range routes, and it served for years as a dependable narrow-body before the Next Generation family replaced it.
On this page
Dimensions
- Length
- 36.45 m
- Wingspan
- 28.88 m
- Height
- 11.13 m
- Cabin Width
- 3.54 m
Performance
- Range
- 5,000 km
- Cruise Speed
- 793 km/h
- Max Speed
- 876 km/h
- Service Ceiling
- 11,300 m
- Category
- medium-haul
Capacity
- Typical Seats
- 146
- Max Seats
- 188
- Cargo Volume
- 28.00 m³
- Size
- narrow-body
Engines
- Count
- 2
- Type
- Turbofan
- Model
- CFM56-3C1
Airlines (8)
Family Variants
Engine Profiles
About Boeing 737-400
737クラシックシリーズの胴体延長型。-400型は-300型より胴体を3m延長し、繁忙な短・中距離路線向けに旅客輸送力を高めました。
Frequently Asked Questions
The Boeing 737-400 typically seats 146 passengers in a two-class configuration. In a single-class high-density layout, it can carry up to 168 passengers. At 36.4 m, it was a stretched version of the 737-300, adding 1.83 m of fuselage length fore and aft of the wing. The cabin width remains the standard 3.54 m with 3-3 seating.
The Boeing 737-400 has a maximum range of approximately 5,000 km (2,700 nautical miles). Like other 737 Classics, it uses two CFM56-3C1 engines in the higher-thrust configuration required for the heavier stretched airframe. The 737-400 was the first 737 variant to feature a tail skid to protect against tail strikes during rotation, necessitated by its longer fuselage.
The 737-800 (Next Generation) replaced the 737-400, offering 16 more passengers (162 vs 146 in two-class), significantly better range (5,765 km vs 5,000 km), and improved fuel efficiency. The 737-800 features a redesigned wing, modern cockpit displays, and larger CFM56-7B engines. The 737-800 became the best-selling 737 NG variant with over 4,900 deliveries, far surpassing the 737-400's 486 units.
The 737-400 shares the Classic-era features of shorter CFM56-3 engine nacelles and lack of winglets. It is longer than the 737-300 by approximately 3 m. The tail skid underneath the aft fuselage is a distinguishing feature not found on the shorter 737-300 or -500. The 737 Classic's smaller cockpit windows and rounded engine nacelles differentiate it from the 737 NG family.
Most Boeing 737-400s have been retired from passenger service in Western markets, though some remain active in developing regions. Many have been converted to freighters (737-400SF), extending their useful life in the cargo market. Alaska Airlines was a prominent operator before transitioning to the 737-800 and 737-900ER. A total of 486 units were delivered between 1988 and 2000.