MAINTENANCE ALLOCATION CHART
Section I. I N T R O D U C T I O N
a. This section provides a general explanation of all maintenance and repair functions
authorized at various maintenance levels.
b. The Maintenance Allocation Chart (MAC) in Section II designates overall
responsibility for the performance of maintenance functions on the identified end item or
component. The implementation of the maintenance functions upon the end item or component
will be consistent with the assigned maintenance functions.
Section III lists the special tools and test equipment required for each maintenance
function as referenced from Section II.
d. Section IV contains supplemental instructions on explanatory notes for a particular
B 2 .
TO determine the serviceability of an item by comparing its physical,
mechanical, and/or electrical characteristics with established standards through examination.
b. Test. To verify serviceability and detect incipient failure by measuring the mechanical
or electrical characteristics of an item and comparing those characteristics with prescribed
Operations required periodically to keep an item in proper operating
condition, i.e., to clean (decontaminate), to preserve, to drain, to paint, or to replenish fuel,
lubricants, hydraulic fluids, or compressed air supplies.
d. Adjust. TO maintain, within prescribed limits, by bringing into proper or exact
position or by setting the operating characteristics to specified parameters.
e. Align. TO adjust specified variable elements of an item to bring about optimum or
Calibrate. To determine and cause corrections to be made or to be adjusted on
instruments or test measuring and diagnostic equipments used in precision measurement.
Consists of comparisons of 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