As a rule-of-thumb for initially setting rates, the hourly contribution for Routine Maintenance (Engine and Airframe combined) can be roughly equated to one-half the hourly cost of fuel and oil. ($20 for all maintenance vs. the $23.75 in our example here). Appropriate adjustments can later be made based upon actual operating experience.
Loan payment. Principle and interest.
Hangar or tie-down
Sub-total fixed costs per hour = F
Fuel ( 1 )
Oil ( 2 )
Annual inspection ( 3 )
Maintenance ( 4 )
Sub-total direct costs per hour = D
Reserve Account(s) + Variable Expenses
Variable: catch-all, or unexpected
Sub-total: optional to include reserve and/or variable in the total
These guidelines provide a basis for determining aircraft operating costs. The actual cost will vary depending on aircraft type, age, and utilization. Records of actual cost should be maintained for each aircraft in order to make adjustments to the guidelines.
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