My Fairchild Metro's are making very good profits for a small 19 seater aircraft. One of them last week made 87,000USD on its own and I have others making about the same.
If you're investing in CI at any appreciable amount at all, there's no way that plane actually made a net profit. It will have cost you way more than $87K between your CI Marketing and all the overhead staff and maintenance costs that aren't reflected in the Aircraft Profit costs. Those figures are gross profits and reflect direct
costs only, and small planes have very low direct costs (cheap lease, fuel, and pilot) but very high (relative to their size) indirect costs.
This is a general statement, but if you're shooting for a decent CI (say 75-90), if you want to figure out what that plane really
makes, open up its' page and add up its' total costs. Take that figure, multiply it by about 1.8, and that's the total
costs of operating that plane. See if it still makes a profit then.
For example, I've got an A300 pulling in $1.2M/week in revenue, has about $600K in direct costs, and so is making a gross
profit of $600K. But I've got millions of dollars in Marketing, (non-pilot and FA) Salaries, Interest, Rent, and Maintenance that's not counted into that. Once you appropriate that money out, that plane's really costing me about $500K more
in indirect costs to operate those routes. Do the simple math, and it's really making me more like just $100K after everything is taken into account.
An A300 has $600K worth of gross profit to spread those costs around. A Fairchild has only $87K of gross profit -- and while it may not have much maintenance costs to take into account, it costs you just as much to market your airline per route and costs just as much to staff the airports (maybe more if you're flying to more destinations) that Fairchild fles to as I spend on that A300.