MAINTENANCE ALLOCATION CHART (MAC)
Section l. INTRODUCTION
B-1.1 This section provides a general explanation of all maintenance and repair functions authorized at various maintenance
B-1.2 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 levels.
B-1.3 Section III lists the tools and test equipment (both special tools and common tool sets) required for each maintenance
function as referenced from section II.
B-1.4 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 below:
To determine the 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).
B-2.2 Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics of an
item and comparing those characteristics with prescribed standards.
B-2.3 Service. Operations required periodically keeping an item in proper operating condition, i.e., to clean (includes
decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids, or gases.
B-2.4 Adjust. To maintain or regulate, within prescribed limits, by bringing into proper position, or by setting the operating
characteristics to specified parameters.
Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
B-2.6 Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test, measuring, and
diagnostic equipment used in precision measurement. Consists of comparisons to two instruments, one of which is a certified
standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared.