December 31,

September 30,

2023

Expendable parts and supplies, net:

Expendable parts and supplies

$

40,215

$

39,630

Less: expendable parts warranty

(7,218

)

(6,295

)

Less: obsolescence

(4,167

)

(4,090

)

$

28,830

$

29,245

Prepaid expenses and other current assets:

Prepaid aviation insurance

$

1,596

$

3,176

Prepaid vendors

896

143

Prepaid other insurance

761

1,205

Lease incentives

143

1,125

Prepaid fuel and other

1,080

1,645

$

4,476

$

7,294

Property and equipment, net:

Aircraft and other flight equipment

$

779,436

$

1,039,782

Other equipment

9,467

9,421

Total property and equipment

788,903

1,049,203

Less: accumulated depreciation

(254,444

)

(351,181

)

$

534,459

$

698,022

Other assets:

Investments in equity securities

$

23,021

$

20,320

Lease incentives

919

954

Contract asset

8,309

8,756

Other

515

516

$

32,764

$

30,546

Other accrued expenses:

Accrued property taxes

$

3,052

$

5,281

Accrued interest

5,099

3,447

Accrued vacation

6,933

6,763

Accrued lodging

3,165

3,984

Accrued maintenance

1,546

2,117

Accrued simulator costs

242

1,006

Accrued employee benefits

1,681

1,450

Accrued fleet operating expense

1,668

650

Other

4,388

2,303

$

27,774

$

27,001

Other noncurrent liabilities:

Warrant liabilities

$

25,225

$

25,225

Lease incentive obligations

1,050

1,050

Long-term employee benefits

495

429

Other

1,819

1,818

$

28,589

$

28,522