What are the four levels of maintenance for military equipment?

The four levels of maintenance for military equipment are Unit, Direct support, General support, and Depot.

Unit maintenance is performed by the military personnel who operate the equipment. It includes routine checks, preventive maintenance, and minor repairs that ensure equipment is ready for immediate use.

Direct support maintenance involves a higher level of technical expertise and is typically performed by specially trained personnel or teams who can address more complex repairs and services that the unit cannot handle. This level of maintenance provides support directly to the units that are operating the equipment on the ground.

General support maintenance serves a broader range of units and can address more extensive repairs and overhauls than what direct support can manage. This level often involves service facilities that can handle multiple units' equipment and perform significant maintenance tasks.

Finally, Depot maintenance is performed at a fixed location, often referred to as a depot or maintenance facility, and focuses on comprehensive repairs that require significant resources or time, including major overhauls and refurbishment of equipment.

This answer covers all four essential levels of maintenance that are critical for military readiness and operational capability.