MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
This section provides a general explanation of all
maintenance and repair functions authorized at various
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 functions upon the end item or component
will be consistent with the assigned maintenance
Section III (Not applicable).
Section IV (Not applicable).
Explanation of Columns in Section II
Column (1), Group Number. A number is
assigned to each group in a top down breakdown
sequence. The applicable groups are listed in the MAC
in disassembly sequence beginning with the first group
Column (2), Assembly Group. This column
contains a brief description of the components of each
Column (3), Maintenance Functions. This
column lists the various maintenance functions (A
through K).The lowest maintenance level authorized to
perform these functions is indicated by a symbol in the
appropriate column. Work measurement time standards
maintenance function) are shown directly below the
symbol identifying the maintenance level. The symbol
designations for the various maintenance levels as
C - Operator or crew
O - Organizational maintenance
F - Direct support maintenance
H - General support maintenance
D - Depot maintenance
The maintenance functions are defined as follows:
A- Inspect: To determine serviceability of an item by
comparing its physical, mechanical, and electrical
B-Test: To verify serviceability and detect incipient
failure by measuring the mechanical or electrical
characteristics with prescribed standards.
C - Service: Operations required periodically to keep
an item in proper operating condition, i.e., to
clean, to preserve, to drain, to paint, or to replenish fuel,
lubricants, hydraulic fluids, or compressed air supplies.
D - Adjust: To maintain within prescribed limits, by
bringing into proper or exact position, or by setting the
operating characteristics to specified parameters.
E - Aline: To adjust specified variable elements of
an item to bring about optimum or desired performance.
F--Calibrate: To determine and cause corrections to
be made or to be adjusted on instruments or test
measuring and diagnostic equipments used in precision
measurement. Consists of comparisons 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.
G--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.
H - Replace: The act of substituting a serviceable
like type part, subassembly, or module (component or
assembly) for an unserviceable counterpart.
I - 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,
subassembly, module (component or assembly), end
item, or system.
J - Overhaul: That maintenance effort (service/
action) necessary to restore an item to a completely
serviceable/operational condition as prescribed by
maintenance standards (i.e., DMWR) in appropriate
technical publication. Overhaul is normally the highest
degree of maintenance performed by the Army.
Overhaul does not normally return an item to like new
K - Rebuild: Consists of those services/actions
necessary for the restoration of unserviceable
equipment to a like new condition in accordance with
original manufacturing standards. Rebuild is the highest
degree of materiel maintenance applied to Army
equipment. The rebuild operation includes the act of
returning to zero those age measurement (hours/miles,
etc.) considered in classifying Army