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APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1. General
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 maintenance functions.
c. Section III lists the special tools and test equipment required for each maintenance function as referenced from
Section II (not applicable).
d. Section IV contains supplemental instructions or explanatory notes for a particular maintenance function (not
applicable).
B-2. Explanation of Columns in Section II
a. Column(1), Group Number. A number is assigned to each group in a top down breakdown sequence. The
applicable groups are listed on the MAC in disassembly sequence beginning with the first group removed.
b. Column(2), Functional Group. This column contains a brief description of the components of each numerical
group.
c. 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.
measurement time standards (the active repair time required to perform the maintenance function) are shown directly
below the symbol identifying the maintenance level. The symbol designations for the various maintenance levels are as
follows:
C - Operator or crew
O - Organization maintenance
F - Direct support maintenance
H --General support maintenance
D - Depot maintenance
The maintenance functions are defined as follows:
(1) Inspect.  To determine serviceability of an item by comparing its physical, mechanical, and electrical
characteristics with established standards through examination.
(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, to
preserve, to drain, to paint, or to replenish fuel, lubricants, hydraulic 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 parameters.
(5) Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
(6) 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 if
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, subassembly, or module (component or assembly)
for an unserviceable counterpart.
(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, subassembly, module
(component or assembly), end item or system.
(10) 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.
B-1

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