VTOL: Flaps
Trim(up): Spoiler
AG3: Reverse Thrusters

Boeing 737 Classic

The Boeing 737 Classic are narrow-body airliners produced by Boeing Commercial Airplanes, the second generation of the original Boeing 737-100/-200. Development began in 1979 and the first variant, the 737-300, first flew in February 1984 and entered service in December of that year. The stretched 737-400 first flew in February 1988 and entered service later that year. The shortest variant, the 737-500, first flew in June 1989 and entered service in 1990.

It is re-engined with higher bypass ratio CFM56 turbofans for a better fuel economy and has upgraded avionics. With a 133,500–150,000 lb (60.6–68.0 t) MTOW, it has a range of 2,060 to 2,375 nmi (3,815 to 4,398 km). At 102 ft (31 m), the -500 is similar in length to the original 737-200 and can fly 110 to 132 passengers. The 110 ft (33.4 m) long -300 can seat 126 to 149 passengers while the 120 ft (36.4 m) long -400 accommodates 147 to 168 seats.

It competed with the McDonnell Douglas MD-80 series, then with the Airbus A320 family which prompted Boeing to update its offer with the 737 Next Generation, thus designating the -300/400/500 variants as the 737 Classic. In total, 1,988 aircraft were delivered from 1984 until production end in the year 2000: 1,113 -300s, 486 -400s and 389 -500s.

Boeing 737-400

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 (3.05 m) to carry up to 188 passengers.[11] 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 February 19, 1988.

The aircraft entered service on September 15, 1988, with launch customer Piedmont Airlines (25 aircraft ordered).

The last two Boeing 737-400s, the last Boeing 737 Classics, were delivered to CSA Czech Airlines on February 28, 2000. The 737-400 was replaced by the 737-800 in the Boeing 737 Next Generation family.

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