MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B.1 THE ARMY MAINTENANCE SYSTEM MAC.
This introduction (section I) provides a general explanation of all maintenance and repair func-
tions authorized at various maintenance levels under the standard Army Maintenance System concept.
The Maintenance Allocation Chart (MAC) in section II designates overall authority and re-
sponsibility 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 capaci-
ties and capabilities of the designated maintenance levels, which are shown in the MAC in column (4) as:
Unit - includes two sub columns, C (operator/crew) and O (unit) maintenance.
Direct Support - includes an F sub column.
General Support - includes an H sub column.
Depot - includes an D sub column.
Section III lists the tools and test equipment (both special tools and common tools sets) re-
quired for each maintenance function as referenced from section II.
Section IV contains supplemental instructions and explanatory notes for a particular mainte-
B.2 MAINTENANCE FUNCTIONS.
Maintenance functions will be limited to and defined as
To determine the serviceability of an item by comparing its physical, mechani-
cal, and/or electrical characteristics with established standards through examination,
To verify serviceability and detect early minor, or intermittent faults by measur-
ing the mechanical or electrical characteristics of an item and comparing those characteristics with pre-
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, chemical
fluids, or compressed air supplies,
To maintain, within prescribed limits, by bringing into proper or exact position, or
by setting the operating characteristics to specified parameters.
To adjust specified variable elements of an item to bring about optimum or de-
To determine and cause corrections to be made or to be adjusted on instru-
ments or test, measuring, and diagnostic equipment used in precision measurement. Consists of compar-
isons 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 compared.
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