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 application of the
maintenance functions to the 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 mainte-
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.
Section IV contains supplemental instructions and explanatory notes for a particular maintenance function.
MAINTENANCE FUNCTIONS. Maintenance functions will be limited to and defined as follows:
Inspect. TO verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical character-
istics of an item and comparing those characteristics with prescribed standards.
Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteris-
tics 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 (in-
cludes decontaminate, when required), to preserve, to drain, to pain, or to replenish fuel, lubricants, chemi-
cal fluids, or gases.
Adjust. TO maintain or regulate, within prescribed limits, by bringing into proper or exact position, or by set-
ting the operating characteristics to specified parameters.
Align. 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 to be adjusted on instruments or test, measur-
ing, and diagnostic equipments used in precision measurement. Consists of comparisons of two instru-
ments, one of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the
accuracy of the instrument being compared.
Remove/Install. To remove and install the same item when required to perform service or other mainte-
nance functions. Install may be the act of emplacing, seating, or fixing into position a spare, repair part, or
module (component or assembly) in a manner to allow the proper functioning of an equipment or system.