What type of maintenance is characterized by work performed in a centrally located facility within a geographical area?

The type of maintenance characterized by work performed in a centrally located facility within a geographical area is known as depot-level maintenance. Depot-level maintenance is conducted in facilities that are often fixed and focused on extensive repair tasks that require a considerable amount of specialized tools, equipment, and skilled personnel. This type of maintenance typically involves significant overhauls and repairs of major components or systems, enabling aircraft to achieve a higher level of operational capability.

Intermediate-level maintenance, while also conducted in facilities that are somewhat centralized, generally refers to less complex repair tasks that do not require the same extensive resources or capabilities as depot-level maintenance. Therefore, it typically focuses on tasks that can be completed quicker and with fewer specialized resources compared to what is required at the depot level.