MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
THE ARMY MAINTENANCE SYSTEM
a. This introduction (section I) provides a general explanation of all maintenance and repair
functions authorized at various maintenance levels under the standard Army Two-Level
Maintenance System concept.
b. 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 maintenance functions to the end item or component will be
consistent with the capacities and capabilities of the designated maintenance levels, which are
shown on the MAC in column (4) as:
Field Maintenance - includes two subcategories: Unit and Direct Support.
Unit - includes two subcolumns, C (operator/crew) and O (organizational) maintenance.
Direct Support - includes an F subcolumn.
Sustainment Maintenance includes two subcategories: General Support and Depot
General Support - includes an H subcolumn.
Depot - includes a D subcolumn.
c. 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.
d. Section IV contains supplemental instructions and explanatory notes for a particular
Maintenance functions will be 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 and to detect incipient failure by measuring the mechanical or
electrical characteristics of an item and comparing those characteristics with prescribed