Which of the following is NOT a part of the Two Level Maintenance System?

The Two Level Maintenance System is designed to enhance the efficiency and effectiveness of aircraft maintenance by dividing maintenance responsibilities into two primary categories: organizational (or field) maintenance and intermediate maintenance.

Field maintenance is typically where minor repairs and routine inspections are performed, focusing on tasks that can be conducted at or near the operational setting. This level intends to keep aircraft operational and address any issues that may arise during normal mission operations.

Intermediate maintenance, on the other hand, involves more complex repairs and overhauls that are beyond the capabilities of the field maintenance personnel. This level is activated when the repairs require a higher level of expertise and special tools or equipment.

Sustainment maintenance is also a crucial component, reflecting the ongoing logistical support and longer-term maintenance necessary to keep an aircraft in service over its life cycle.

Flight operations maintenance is not considered part of the Two Level Maintenance System. While it is essential to the overall functioning of an aircraft, it does not fall within the criteria of either field or intermediate maintenance that the Two Level Maintenance System encompasses. Instead, flight operations maintenance involves activities directly associated with preparing and executing flight operations rather than the maintenance and repair framework that defines the Two Level Maintenance System.