The following are Indirect Operating Expense- Aircraft Service categories for . There are also links below that will allow users to drill down further and determine what actually composes these categories. As a reminder
- Line Servicing The flight line is referred to by most airlines as the front lines where most of the action takes place. Aircraft usually park on the line.
- Control A good deal goes on behind the scenes to control the aircraft. Everything from coordination to scheduling.
- Landing Fees Large commercial airports usually charge a fee each time an aircraft lands. The fee depends on the airport.
