MAINTENANCE ALLOCATION CHART
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 implementation of the maintenance
functions upon the end item or component will be consistent with the assigned maintenance functions.
Section lIl lists the special tools and test equipment required for each maintenance function as referenced from
Section IV contains supplemental instructions and explanatory notes for a particular maintenance function.
Maintenance functions will be limited to and defined as follows:
Inspect. To determine the serviceability of an item by com paring its physical, mechanical, and/or electrical
characteristics with established standards through examination.
Test. To verify serviceability by measuring the mechanical 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
decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids, or gases.
Adjust. To maintain, 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.
Calibrate. To determine and cause corrections to be made or tobe adjusted on instruments or test, measuring,
and diagnostic equipment 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
Remove/lnstall. To remove and install the same item when required to perform service or other maintenance
functions. Install is the act of emplacing, seating, or fixing into position an item, part, or module (component or assembly)
in a manner to allow the proper functioning of an equipment or system.
Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace" is
authorized by the MAC and is shown as the ad position code of the SMR code.