Aviation Why Indigo dropped Pratt and Whitney and went with CFM for its mega engine order Updated : July 31, 2019 12:24 PM IST Indigo’s fleet strategy has been one that combines pricing power by volumes coupled with a sale and leaseback financing mechanism. Engine selection for any airline is a complex process because of the myriad inputs that have to be considered. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.