Originally Posted by clipped
This is from a genius of a man who has recently stated - that thinking innovatively, it is better to buy new CFM56 engines than repair them.
If GE have put a changeover price in place low enough then perhaps it is.
Do you have any figures to the contrary? Or just supposition?
From Wiki, so not an authoritative source but something worth considering
CFM56-7B "Evolution"
In 2009, CFMI announced the latest upgrade to the CFM56 engine, the "CFM56-7B Evolution" or CFM56-7BE. This upgrade, announced alongside Boeing's newest 737 variant, further enhances the high- and low-pressure turbines with better aerodynamics, as well as improving engine cooling, and aims to reduce overall part count.
CFMI expected the changes to result in a 4% reduction in maintenance costs and a 1% improvement in fuel consumption (2% improvement including the airframe changes for the new 737); however, flight and ground tests completed in May 2010 revealed that the fuel burn improvement was better than expected at 1.6%.
Following 450 hours of testing, the CFM56-7BE engine was certified by FAA and EASA on 30 July 2010.
1.6% fuel saving and 4% maintenance.
Pretty significant methinks.