Once you open the model please take a look at page 2. Here we list the Top 50 busiest passenger aircraft in the US airline fleets among the majors. You can select an airline or if none is selected you see the national fleet.
If we summarize the fleet, including all airlines for regionals and single aisles, this what we get.
Probably not what you expected to see, right? Just to be clear, there is a steady process if data cleaning going on. Take a look at the model, it generates some interesting results.