What level of maintenance does Depot Level Maintenance refer to?

Depot Level Maintenance refers to the highest level of maintenance within the hierarchy of aviation maintenance practices. This level encompasses comprehensive maintenance and refurbishment tasks that generally include major repairs, overhauls, and even modifications to equipment and aircraft components. Depot level maintenance is typically performed at specialized facilities, often known as depots, where highly trained personnel have access to extensive resources and equipment that may not be available at lower levels of maintenance. This ensures that more complex issues can be thoroughly addressed, and components can be restored to a like-new condition.

Lower levels of maintenance, such as organizational and intermediate levels, handle routine checks, minor repairs, and limited adjustments. These levels do not involve the specialized capabilities and extensive resources found at depot level, making it distinct and critical for the overall lifecycle management of aviation assets.