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The Boeing 737 Classic refers to the -300/-400/-500 Boeing 737 series. It is the 737's second-generation derivative, following the original -100/-200 models. The 737 Classic models are short- to medium-range, narrow-body jet airliners that can seat between 145 and 188 passengers. Improvements over the previous 737 generation included CFM International CFM56 high-bypass-ratio turbofan engines and upgraded avionics.

The 737-300 entered service in 1984, followed by the 737-400 in 1988, and finally the smaller 737-500 in 1990.

Engines[]

Boeing selected the CFM56-3 to power the 737-300 variant. The 737 wings were closer to the ground than planes that had previously used the CFM56. This meant Boeing had to modify the engine by reducing the fan diameter in order to reduce the bypass ratio and by moving the engine accessory gearbox from the 6 o'clock position to the 9 o'clock position. Moving the gearbox gave the engine nacelle its distinctive flat-bottomed shape, often nicknamed the "hamster pouch".

Accidents and incidents[]

As of December 2017, 62 hull losses of Boeing 737 Classic series aircraft have occurred, with a total of 1,176 fatalities. According to a Boeing analysis on commercial jet airplane accidents from 1959-2013, the classic series has a hull loss rate of 0.54 per million departures versus 0.27 for the Next Generation series and 1.75 for the original series.

Series Hull-losses Hull-loss accidents Criminal occurences and hijackings Survival rate of fatal accidents
-300 34 31 6 31.1%
-400 24 23 4 54.7%
-500 8 7 2 30.4%

Technical specs[]

Measurement 737-300 737-400 737-500
Seats 149 (maximum)

128 (2-class)

168 (maximum)

146 (2-class)

132 (maximum)

108 (2-class)

Length 109 ft 7 in (33.4 m) 119 ft 6 in (36.5 m) 101 ft 8 in (31.1 m)
Fuselage width 12 ft 4 in (3.76 m) 12 ft 4 in (3.76 m) 12 ft 4 in (3.76 m)
Cruising speed (Mach) 0.74 0.74 0.74
Maximum speed (Mach) 0.82 0.82 0.82
Engine x2 CFM56-3B-1 CFM56-3B-2 CFM56-3B-1
MTOW 138,500 lb / 62,822 kg 150,000 lb / 68,038 kg 133,500 lb / 60,554 kg
MLW 116,600 lb / 52,888 kg 124,000 lb / 56,245 kg 110,000 lb / 49,895 kg
ZFW 109,600 lb / 49,713 kg 117,000 lb / 53,070 kg 103,000 lb / 46,720
OEW 72,360 lb / 32,821 kg 76,760 lb / 34,817 kg 70,440 lb / 46,720 kg
Fuel capacity 5,311 US gal / 20,100 L 5,311 US gal / 20,100 L 5,311 US gal / 20,100 L
Range 2,255 nmi (4,176 km) 2,060 nmi (3,820 km) 2,375 nmi (4,398 km)
ICAO type B733 B734 B735
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