MAINTENANCE ALLOCATION CHART (MAC)
Section I. INTRODUCTION
This section provides a general explanation of all maintenance and repair functions authorized at various
The Maintenance Allocation Chart (MAC) in section II designates overall authority and responsibility for the
performance of maintenance functions on the identified end item or component. The application of the
maintenance functions to the end item or component will be consistent with the capacities and capabilities of the
designated maintenance categories.
Section III lists the special tools and test equipment (both special tools and common tool sets) required for each
maintenance function as referenced from section II.
Section IV contains supplemental instructions and explanatory notes for a particular maintenance function.
B-2. MAINTENANCE FUNCTIONS
Maintenance functions will be limited to and defined as follows:
Inspect. To determine serviceability of an item by comparing its physical, mechanical, and/or electrical
characteristics with established standards through examination (e.g., by sight, sound, or feel).
Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics of
an item and comparing those characteristics with prescribed standards.
Service. Operations required periodically to keep an item in proper operating condition, i.e., to clean (includes
decontamination, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids,
Adjust. To maintain or regulate, within prescribed limits, by bringing into proper or exact position, or by setting
the operating characteristics to specified parameters.
Aline. To adjust specified variable elements of an item to bring about optimum or desired performance.