Opportunities exist to re-engine commercial airliners with new high-bypass-ratio engines. One such example is the Model 737-300, a derivative of the Advanced 737-200 airplane with two CFM56-3 engines. The ground clearance of the 737 and the increased engine diameter present a unique design problem. A close coupled nacelle/wing, a new leading edge slat, and a horizontal tail extension are required along with increased operational weights. About 20 passenger seats have been added. Noise levels and fuel consumption have been substantially reduced.
