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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Sep. 30, 2022
Accounting Policies [Abstract]  
Summary of Estimated Useful Lives of Various Classifications of Property and Equipment

Estimated useful lives of the various classifications of property and equipment are as follows:

 

Property and Equipment

 

Estimated Useful Life

Buildings

 

30 years

Aircraft

 

25 years from the manufacture date

Flight equipment

 

7-20 years

Equipment

 

5-9 years

Furniture and fixtures

 

3-5 years

Vehicles

 

5 years

Rotable spare parts

 

Life of the aircraft or term of the lease, whichever is less

Leasehold improvements

 

Life of the aircraft or term of the lease, whichever is less