Accordingly, the estimated useful lives for the principal property and equipment classification are as follows:
Principal Property and Equipment ClassificationEstimated Useful Life
Aircraft, engines and related rotable parts
20 – 33 years
Buildings and improvements
5 – 30 years
Furniture, fixtures and other equipment
3 – 15 years
Capitalized software
5 – 10 years

Historical Timeline

Fiscal YearFiled
2025Feb 18, 2026Showing above
2024Feb 19, 2025
2017Feb 21, 2018

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.