Which level of maintenance is responsible for overhaul and rework?

The correct choice is the level of maintenance known as Depot Level Maintenance. This level is primarily responsible for addressing major overhauls and rework of equipment and systems. Depot Level Maintenance involves extensive repairs, part replacements, modifications, and thorough inspections that go beyond the capabilities of the other maintenance levels.

Facilities at this level typically have specialized resources, including skilled personnel and advanced equipment, to manage complex tasks that may involve disassembly, restoring equipment to original specifications, or significant upgrades. This maintenance level is essential for ensuring the long-term reliability and performance of aircraft and related systems, especially after they have undergone extensive service.

Other maintenance levels, such as O-level, I-level, and Organizational Maintenance, are primarily focused on less comprehensive maintenance tasks, including routine inspections and repairs. While they play critical roles in the overall maintenance hierarchy, they do not handle the extensive overhaul and rework tasks that are characteristic of Depot Level Maintenance.