APU fuel saving VS cost of availability of ground carts for cooling and electricity - Essay ExampleNevertheless, the APU requires a typical maintenance plan that costs approximately $50 per hour (John, 2015; 210).Considering an aircraft that flies 400 hours in a year, the cost of APU fuel would be $80, 000/year. The cost of maintenance would be $20,000. Therefore, the total annual cost of using the APU power generator would $100, 000. However, the cost might vary depending on changes on fuel price and also labor charges (Thom, 2014; 120). According to Green (2015; 216), there are other expenses that are associated with the use of APU power generators. They have to undergo through a process of approval by the FAA and other governing bodies. This process is very expensive and adds cost to the specified operational costs. Therefore, it is evident that the cost of using APUs is higher than $100, 000 during the first year of use. These expenses are made high due to factors such as high expense of the JET-A fuel that is used by the APUs (Williams, 2015; 514).