Item 2. Properties

We operate in approximately 80 countries, with over 500 significant properties comprising approximately 80 million square feet of productive space. Approximately 49% of our significant properties are associated with our aerospace businesses and 51% are associated with our commercial businesses. Approximately 43% of our significant properties are leased and 57% are owned. Approximately 45% of our significant properties are located in the United States.

Our fixed assets as of December 31, 2017 include manufacturing facilities and non-manufacturing facilities such as warehouses, and a substantial quantity of machinery and equipment, most of which are general purpose machinery and equipment using special jigs, tools and fixtures and in many instances having automatic control features and special adaptations. The facilities, warehouses, machinery and equipment in use as of December 31, 2017 are in good operating condition, are well-maintained and substantially all are generally in regular use.