TSS Boeing 737-600/700 CFM56-7B20 Pilot Edition v2 Sound Package

The Boeing 737 is a short- to medium-range twinjet narrow-body airliner. Originally developed as a shorter, lower-cost twin-engined airliner derived from Boeing's 707 and 727, the 737 has developed into a family of ten passenger models with a capacity of 85 to 215 passengers. The 737 is Boeing's only narrow-body airliner in production, with the 737 Next Generation (-700, -800, and -900ER) variants currently being built. Production has also begun on the re-engined and redesigned 737 MAX, which is set to enter service in 2017.

The CFM56-7 powers the Boeing 737 Next Generation series (737-600/-700/-800/-900). The CFM56-7 first ran on 21 April 1995 is rated with takeoff thrust from 19,500 to 27,300 lbf (86.7 kN to 121 kN). It has higher thrust ranges, improved efficiency, and lower maintenance costs than its predecessor, the CFM56-3 series. It incorporates features from the CFM56-5 series such as FADEC, double-annular combustor (as an option), and improved internal design. The basic mechanical arrangement is as the -3 series, but all aspects were aerodynamically improved from that model. For example, the improved wide-chord fan blades allowed the total number of fan blades to be reduced from 38 to 24. Other improvements came from material advances, such as the use of single-crystal turbine blades in the high-pressure turbine.