INTRODUCTION FOR MAINTENANCE ALLOCATION CHART (MAC)
THIS WORK PACKAGE COVERS:
The Army Maintenance System (MAC), Maintenance Functions, Explanation Of Columns in the MAC, Table 1,
Explanation of Columns in Tools and Test Equipment requirements, Table 2, and Table 3, Remarks column.
THE ARMY MAINTENANCE SYSTEM MAC
a. This work package provides a general explanation of all maintenance and repair functions authorized at vari-
ous maintenance levels under the standard Army Maintenance System concept.
b. The Maintenance Allocation Chart (MAC) in Table 1 (WP 0715 00) designates overall authority and responsibil-
ity 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 des-
ignated maintenance levels, which are shown on the MAC in column (4) as:
Unit -- includes two subcolumns, C (operator/crew) and O
Direct Support -- Includes an F subcolumn.
General Support -- Includes an H subcolumn.
Depot -- includes a D subcolumn.
c. Table 2 (WP 0715 00) lists the tools and test equipment (both special tools and common tool sets) required for
each maintenance function as referenced from Table 1 (WP 0715 00).
d. Table 3 (WP 0715 00) contains supplemental instructions and explanatory notes for a particular maintenance
Maintenance functions are limited to and defined as follows:
a. Inspect. 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. Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics of
an item and comparing those characteristics with prescribed standards.
c. Service. Operations required periodically to keep an item in proper operating condition; e.g., to clean (in-
cludes decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids,
d. Adjust. To maintain or regulate, within prescribed limits, by bringing into proper position, or by setting the op-
erating characteristics to specified parameters.
e. Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
f. Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test, measur-
ing, 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 instru-
ment being compared.
g. Remove/Install. To remove and install the same item when required to perform service or other maintenance
functions. Install may be the act of emplacing, seating, of fixing into position a spare, repair part, or module (compo-
nent or assembly) in a manner to allow the proper functioning of an equipment or system.
h. Replace. To remove an unserviceable item and install a serviceable counterpart in its place. Replace is au-
thorized by the MAC and assigned maintenance level is shown as the 3rd position of the SMR code.