B737-400
The Boeing 737-400 is a stretched variant of the 737 Classic series, introduced in 1988 to provide additional capacity on higher-density short-haul routes. Compared to the 737-300, the 737-400 features a fuselage stretched by ten feet, accommodating up to 168 passengers in a single-class layout. It is powered by two CFM International CFM56-3C1 turbofan engines, delivering enhanced thrust to compensate for the additional weight of the longer airframe. With a range of approximately 1,850 nautical miles, the 737-400 retained the operational flexibility of earlier Classic variants while offering airlines a meaningful capacity increase. The type was popular with European charter and leisure carriers, as well as full-service airlines seeking to maximize utilization on busy trunk routes. Piedmont Airlines and British Midland were among the prominent operators. A total of 486 Boeing 737-400s were built before production ended in 2000. Many remain in service today in passenger and freighter roles, converted under the Boeing 737-400SF Special Freighter program.
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