MAINTENANCE ALLOCATION CHART
Section I. Introduction
a. This section provides a general explanation of
all maintenance and repair functions authorized at
various maintenance levels.
b Section II designates overall responsibility for
the performance of maintenance functions on the
identified end item or component and the work
measurement time required to perform the functions by
the designated maintenance level. The implementation
of the maintenance functions upon the end item or
component will be consistent with the assigned
Section III lists the tools and test
equipment required for each maintenance function as
referenced from Section II.
D-2. Explanation of Columns In Section II
a. Column (1), Group Number. Column 1 lists
assemblies, sub-assemblies, and modules with their
next higher assembly. The applicable groups are listed
in the MAC in disassembly sequence beginning with the
first group removed.
b. Column (2), Component/Assembly. This
column contains the noun names of components,
assemblies, sub-assemblies and modules for which
maintenance is authorized.
c. Column (3), Maintenance Functions. This
column lists the functions to be performed on the item
listed in Column 2. The maintenance functions are
defined as follows:
(1) Inspect. To determine serviceability of
an item by comparing its physical, mechanical, and/or
electrical characteristics with established standards
(2) 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.
(3) 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
(4) Adjust. To maintain within prescribed
limits, by bringing into proper or exact position, or by
setting the operating characteristics to be specified
(5) Align. To adjust specified variable
elements of an item to bring about optimum or
(6) Calibrate. To determine and cause
corrections to be made or to be adjusted on instruments
to test measuring and diagnostic equipments used in
precision measurement. Consist of comparison 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.
(7) Install. The act of emplacing, seating,
or fixing into position an item, part or module
(component or assembly) in a manner to allow the
proper functioning of an equipment or system.
(8) Replace. The act of substituting a
serviceable like type part, sub-assembly, or module
(9) Repair. The application of maintenance
services (inspect, test, service, adjust, align, calibrate,
or replace) or other maintenance actions (welding,
grinding, riveting, straightening, facing, remachining or
resurfacing) to restore serviceability to an item by
correcting specific damage, fault, malfunction, or failure
in a part, sub-assembly, module (component or
assembly), end item, or system.
Overhaul. That maintenance
effort (service/action) necessary to restore an item to a
prescribed by maintenance standard (i. e. , DMWR) in
appropriate technical publications. Overhaul is normally
the highest degree of maintenance performed by the
Army. Overhaul does not normally return an item to like
Rebuild. Consists of those
unserviceable equipment to a like new condition in
accordance with original manufacturing standards.
Rebuild is the highest degree of material maintenance
applied to army equipment. The rebuild operation
includes the act of returning to zero those age
measurements (hours/miles, etc. ) considered in
classifying army equipment/components.