When creating a route the Market Research tab shows a bar indicating the load factor. Sometimes it shows a 100% load factor, but part of the bar is blue. By lowering price I can make more of the bar green, and increase profit.
My question is what is the blue on the Load factor bar indicating?
I have 5 leased Douglas DC-9-50s in my fleet and I'm using them just fine.
But I also have a leased McDonnell Douglas MD-81 that shows up on the Maintenance list but it is not on the list of available planes when I try to assign it to a route. Any thoughts on why I can't use the MD-81?