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 responsibility for the
performance of maintenance functions on the identified end item or component.
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.
Section IV contains supplemental instructions or explanatory notes for a particular maintenance function.
Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or
electrical characteristics with established standards through examination.
Test. To verify serviceability and to detect incipient failure 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
(decontaminate), to preserve, to drain, to paint, or to replenish fuel, lubricants, hydraulic fluids, or compressed air
Adjust. To maintain, within prescribed limits, by bringing into proper or exact 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.
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 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
Install. 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 on an equipment system.