Southwest Airlines has aggressive plans to dispose of its Boeing 737 Classics over the next several years, but at the same time needs to keep pace, in a cost-effective manner, with the scheduled overhauls on the CFM56-3 engines that power those aircraft. The airline does not want to have to buy expensive new parts for engines that are unlikely to be in the Southwest fleet for more than just a few years. So Southwest, which earlier this year said it hoped to retire all of its 737 Classics ...


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