I think the manufacturer commonality isn't as big as the family commonality, every type commonality requires competency training and certification. Each type training costs about the same, takes about the same time, from both the majors. Parts, maybe if you have a all B or all A fleet they can cut you a deal, but that is an acquisitions thing. It doesn't matter which manufacturer from a maintenance perspective, only a acquisition and pilot training perspective. Plus, a manufacturer can have planes that vary greatly, a Bombarider 415, a turboprop amphibious is vastly different from a CS300, a modern narrow-body airliner..
An single type family = save money, all same manufacturer, but bunch of different types, not so much. I'd same same type is 80%, 10% size, manufacturer is 10%.
Oh, just as a additional thing, I think a great way to group is by maintenance certifications/training. Maybe group the re-engines together.
An single type family = save money, all same manufacturer, but bunch of different types, not so much. I'd same same type is 80%, 10% size, manufacturer is 10%.
Oh, just as a additional thing, I think a great way to group is by maintenance certifications/training. Maybe group the re-engines together.