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Boeing 737 Classic
The 737 Classic is the second generation of Boeing's single-aisle twin: the 737-300, 737-400 and 737-500, which followed the original 737-100 and -200. They replaced the earlier jets' Pratt & Whitney JT8D engines with CFM International CFM56-3 turbofans and brought longer fuselages and larger wings and tailplanes. The FAA certified the -300 in November 1984, the -400 in September 1988 and the shortened -500 in February 1990. Boeing built 1,988 of the three at Renton, Washington, and the last one off the line was a 737-400. The Next Generation 737s followed.
The variants side by side
| Variant | Range | Seats | Length | First flight | Status | Flights seen |
|---|---|---|---|---|---|---|
| 737-300 | – | About 128 in two classes (up to 149) | 109 ft 7 in (33.40 m) | – | Still flying with a few operators | 49 |
| 737-400 | – | About 146 in two classes (up to 188) | 119 ft 7 in (36.45 m) | – | Still flying with a few operators | 220 |
Flights seen in US airspace in the last 7 days (public flight data).