AWG OC

The twin-engine, narrow-body 737 is the bestselling airplane in history. Since the first B737 launched in 1967, these planes have flown nearly 7 billion people. Boeing's Next-Generation 737s reduced on-the-ground noise by 12db via "the installation of a new diffuser duct and silencer on the cooling vent on the auxiliary power unit."  (Aerospace Technology) B737s are powered by twin CFM International LEAP 1-B engines. They have a maximum range between 3300km (2050mi) and 3850km (2392). (Boeing)