MAINTENANCE DIVISION/BRANCH—The part of an activity responsible for the activity’s aircraft maintenance functions or the part of an aircraft maintenance department responsible for a specific part of the department’s functions; for example, repair of power plants. In the shore establishment, stations responsible for only I-level and O-level maintenance will have maintenance divisions of operations or air departments. MAINTENANCE FACILITY—Any building, property, or space designed for, available to, or used by aircraft maintenance activities. Use of the term refers to shops, hangars, or parking areas, both afloat and ashore, used primarily for aircraft upkeep or rework purposes. Use of the term does not refer to the organization’s personnel, responsibilities, or material (except installed aircraft SE). Aircraft maintenance facilities are classified by the levels of maintenance they are designed for or used to support. The highest level is established as the facility’s classification. This classification does not necessarily indicate the facility involved includes facilities for all the lower levels of maintenance. NOTE: The term aircraft maintenance facility includes installed aircraft SE when applied to Navy facilities. When applied to Marine Corps facilities, it does not. MAINTENANCE FACILITY MODULE—Stan- dard design increments of aircraft maintenance facilities that permit the construction of a facility without additional design other than that of site adaptation and orientation. There will be two standard modules for use within the naval establishment: intermediate and organizational as required by the functional responsibility of the aircraft maintenance activity or activities that will be the tenant(s) of the facility involved. MAINTENANCE FUNCTIONS—A detailed state- ment of the aircraft maintenance work of each aircraft maintenance level. Maintenance functions stem from maintenance tasks, are assigned by the COMNAVAIRSYSCOM, and are classified as to the aircraft maintenance levels to which they apply. MAINTENANCE LEVELS—Maintenance tasks divided into the number of levels required so common standards can be applied to the many and varied aircraft maintenance activities of the military establishment. They are increments of which all maintenance activities are composed. The three levels are: depot (D-level), intermediate (I-level), and organizational (O-level). MAINTENANCE PLANNING—The design, method, or scheme for accomplishing an aircraft mission or reaching an aircraft maintenance objective or objectives. MAINTENANCE PROCEDURES—Established methods for periodic checking and servicing of items to prevent failure or to effect a repair. MAINTENANCE SCHEDULE—A plan of proce- dures for carrying out specific jobs or projects in a maintenance activity’s maintenance program, fixing the time when operations are to begin or be completed. MAINTENANCE STATUS—The classification or condition of equipment undergoing preventive/ restorative action. MAINTENANCE STATUS DISPLAY AND RECORDING SYSTEM—Monitors engine and airframe operational status for unit failures, cautions, and advisory conditions and sends this information to the mission computer system for processing on selected aircraft. MAINTENANCE TASK—Incremental maintenance elements performed by maintenance personnel in completing a maintenance action. MAINTENANCE TYPES—Rework and upkeep are the two basic types of aircraft maintenance performed within the naval establishment without distinction as to levels of maintenance. Rework is performed only in the shore establishment. It may be performed on any program aircraft (operating or nonoperating), aircraft equipment, or aircraft SE. It is performed only by industrial type activities assigned the mission, task, or functional responsibility of providing maintenance program support. Rework is performed with both military and civilian personnel and is managed by the COMNAVAIRSYSCOM. Upkeep is performed only on operating aircraft, aircraft equipment, or aircraft SE. It is performed by military type activities assigned aircraft or equipment or assigned the mission, task, or functional responsibility of providing direct support to such activities. Upkeep is normally performed with military personnel and is managed by major operating commands. MAIR—Master Aircraft Inventory Record. AI-14