MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
a. This section provides a general explanation of all maintenance and repair functions authorized at various
b. The Maintenance Allocation Chart (MAC) in Section II designates overall responsibility for the performance
of maintenance functions on the identified end item or component. The implementation of the maintenance
functions upon the end item or component will be consistent with the assigned maintenance functions.
c. Section III lists the special tools and test equipment required for each maintenance function as referenced
from Section II.
d. Section IV contains supplemental instructions and explanatory notes for a particular maintenance function.
B2. MAINTENANCE FUNCTIONS. 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.
b. Test. To verify serviceability and detect incipient failure by measuring the mechanical 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, i.e., to clean
(decontaminate), to preserve, to drain, to paint, or to replenish fuel} lubricants, hydraulic fluids, or compressed air
d. Adjust. To maintain, within prescribed limits, by bringing into proper or exact position, or by setting the
operating characteristics to specified parameters.
e. Install. The act of emplacing, seating, or fixing into position an items, part, or module (component or
assembly) in a manner to allow the proper functioning of an equipment or system.
f. Replace. The act of substituting a serviceable liketype part, subassembly, or module for an unserviceable
g. Repair. The application of maintenance services or other maintenance actions to restore serviceability to
an item by correcting specific damage, fault, malfunction, or failure in a part, subassembly, module (component or
assembly), end item, or system.
h. Overhaul. That maintenance effort (services/actions) necessary to restore an item to a Completely
serviceable/operational condition as prescribed by maintenance standards, i.e., Depot Maintenance Work
Requirement, in appropriate technical publications. Overhaul is normally the highest degree of maintenance
performed by the ARMY. Overhaul does not normally return an item to likenew condition.
B3. EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
a. Column 1, Group Number. Column 1 lists group numbers, the purpose of which is to identify components,
assemblies, subassemblies, and modules with the next higher assembly.
b. Column 2, Component/ Assembly. Column 2 contains the names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
c. Column 3, Maintenance Function. Column 3 lists the function to be performed on the item listed in Column
2. (For detailed explanation of these functions, see paragraph B-2).