MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
(5) Align. To
a. This section provides a general explanation of all
elements of an item to bring about optimum or desired
maintenance and repair functions authorized at various
To determine and cause
b. Section II designates overall responsibility for the
corrections to be made or to be adjusted on instruments
performance of maintenance functions on the identified
or test measuring and diagnostic equipments used in
end item or component and the work measurement time
precision measurement. Consists of comparison of two
required to perform the functions by the designated
instruments, one of which is a certified standard of
The implementation of the
known accuracy, to detect and adjust any discrepancy in
maintenance functions upon the end item or component
the accuracy of the instrument being compared.
will be consistent with the assigned maintenance
(7) Install. The act of emplacing, seating, or
fixing into position an item, part or module (component or
c. Section III lists the tools and test equipment
assembly) in a manner to allow the proper functioning of
required for each maintenance function as referenced
an equipment or system.
from section II.
The act of substituting a
serviceable like type part, sub-assembly, or module
B-2. Explanation of Columns in Section II
(component or assembly) for an unserviceable
a. Column (1), Group Number. Column 1 lists group
numbers to identify related components, assemblies,
(9) Repair. The application of maintenance
sub-assemblies, and modules with their next higher
services (inspect, test, service, adjust, align, calibrate, or
assembly. The applicable groups are listed in the MAC
replace) or other maintenance actions (welding, grinding,
in disassembly sequence beginning with the first group
resurfacing) to restore serviceability to an item by
correcting specific damage, fault, malfunction, or failure
column contains the noun names of components,
in a part, sub-assembly, module (component or
assemblies, sub-assemblies and modules for which
assembly), end item, or system.
maintenance is authorized.
That maintenance effort
c. Column (3), Maintenance Functions. This column
(service/action) necessary to restore an item to a com-
lists the functions to be performed on the item listed in
condition as prescribed by
column 2. The maintenance functions are defined as
maintenance standards (e,e., DMWR) in appropriate
technical publications. Overhaul is normally the highest
(1) Inspect. To determine serviceability of an
degree of maintenance per- formed by the Army.
item by comparing its physical, mechanical, and/or
Overhaul does not normally return an item to like new
electrical characteristics with established standards
(11). Rebuild. Consists of those services/actions
(2) Test. To verify serviceability and detect
necessary for the restoration of unserviceable equipment
incipient failure by measuring the mechanical or
to a like new condition in accordance with original
electrical characteristics of an item and comparing
manufacturing standards. Rebuild is the highest degree
those characteristics with prescribed standards.
of materiel maintenance applied to Army equipment.
(3) Service. Operations required periodically
The rebuild operation includes the act of returning to zero
to keep an item in proper operating condition, i.e., to
those age measurements (hours/miles, etc.) considered
clean (decontaminated), to preserve, to drain, to
in classifying Army equipment/components.
fluids, or compressed air supplies.
(4) Adjust. To maintain within prescribed
limits, by bringing into proper or exact position, or
by setting the operating characteristics to specified