MAINTENANCE ALLOCATION CHART
Section 1. INTRODUCTION
B - Test: To verify serviceability and detect
incipient failure by measuring the mechanical or
electrical characteristics of an item and comparing those
a. This section provides a general explanation of
characteristics with prescribed standards.
all maintenance and repair functions authorized at
C - Service: Operations required periodically to
various maintenance levels.
keep an item in proper operating condition, i.e., to clean,
b. Section II designates overall responsibility for
to preserve, to drain, to paint, or to replenish fuel,
the performance of maintenance functions on the
lubricants, hydraulic fluids, or compressed air supplies.
identified end item or component and the work
D - Adjust: To maintain within prescribed limits,
measurement time required to perform the functions by
by bringing into proper or exact position, or by setting
the designated maintenance level. The implementation
the operating characteristics to specified parameters.
of the maintenance functions upon the end item or
E - Align: To adjust specified variable elements of
component will be consistent with the assigned
an item to bring about optimum or desired performance.
F - Calibrate: To determine and cause corrections
c. Section III lists the special tools and test
to be made or to be adjusted on instruments or test
equipment required for each maintenance function as
measuring and diagnostic equipments used in precision
referenced from Section II. (Not Applicable).
Consists of comparisons of two
d. Section IV contains supplemental instructions
instruments, one of which is a certified standard of
or explanatory notes for a particular maintenance
known accuracy, to detect and adjust any discrepancy in
function. (Not Applicable).
the accuracy of the instrument being compared.
G - Install: The act of emplacing, seating, or
Explanation of Columns in Section II
fixing into position an item, part, or module (component
or assembly) in a manner to allow the proper functioning
a. Column (1), Group Number. A number is
of an equipment or system.
assigned to each group in a top down breakdown
H - Replace: The act of substituting a serviceable
sequence. The applicable groups are listed on the MAC
like type part, subassembly, or module (component
in disassembly sequence beginning with the first group
assembly) for an unserviceable counterpart.
I - Repair:
The application of maintenance
b. Column (2), Functional Group. This column
services (inspect, test, service, adjust, align, calibrate,
contains a brief description of the components of each
or replace) or other maintenance actions (welding,
grinding, riveting, straightening, facing, remachining or
c. Column (3), Maintenance Functions. This
resurfacing) to restore serviceability to an item by
column lists the various maintenance functions (A
correcting specific damage, fault, malfunction, or failure
through K). The lowest maintenance level authorized to
in a part, subassembly, module (component or
perform these functions is indicated by a symbol in the
assembly), end item, or system.
appropriate column. Work measurement time standards
J - Overhaul:
(the active repair time required to perform the
(service/action) necessary to restore an item to a
maintenance function) are shown directly below the
symbol identifying the maintenance level. The symbol
prescribed by maintenance standards (i.e., DMWR) in
designations for the various maintenance levels are as
appropriate technical publication. Overhaul is normally
the highest degree of maintenance performed by the
C. Operator or crew
Army. Overhaul does not normally return an item to like
O. Organization maintenance.
F. Direct support maintenance.
K - Rebuild: Consists of those services/actions
H. General support maintenance
necessary for the restoration of unserviceable
D. Depot maintenance.
equipment to a like new condition in accordance with
The maintenance functions are defined as follows:
original manufacturing standards. Rebuild is the highest
A - Inspect: To determine serviceability of an
degree if maintenance applied to Army equipment.
item by comparing its physical, mechanical, and
electrical characteristics with established standards