MAINTENANCE ALLOCATION CHART MAC)
Section I. INTRODUCTION
adjust any discrepancy in the accuracy of the instrument
This Maintenance Allocation Chart designates overall
g. Install. The act of emplacing, seating, or fixing into
responsibility for the performance of maintenance
position art item, part, or module (component or assembly)
functions for the HSS. The implementation of field
in a manner to allow the proper functioning of an
maintenance tasks upon this system will be consistent with
equipment or system.
the assigned maintenance operations.
h. Replace. The act of substituting a serviceable like
type part, subassembly, or module (component or
C-2. Maintenance Functions.
assembly) in a manner to allow the proper functioning of
Maintenance functions will be limited to and defined as
i. Repair. The application of maintenance services
a. Inspect. To determine the serviceability of an item
(input, test, service, adjust, align, calibrate, replace) or
other maintenance actions (welding, grinding, riveting,
by comparing its Physical, mechanical and/or electrical
straightening, facing, remachining, or resurfacing) to restore
characteristics with established standards through
serviceability to an item by correcting specific damage,
fault, malfunction, or failure in a part, disassembly,
module/component/assembly end item or system.
b. Test. To verify serviceability and detect incipient
failure by measuring the mechanical or electrical
j. Overhaul. That maintenance effort (service/action)
characteristics of an item and comparing those
necessary to restore an item to a completely
characteristics with prescribed standards.
serviceable/operational condition as prescribed by
maintenance standards (e.g., DMWR) in pertinent technical
c. Service. Operations required periodically to keep an
publications. Overhaul is normally the highest degree of
end item in proper operating condition, i.e., to clean, to
maintenance performed by the Army. Overhaul does not
preserve, to drain, to paint, or to replenish fuel, lubricants,
normally return an item to like new condition.
hydraulic fluids, or compressed air supplies.
k. Rebuild. Consists of those services/actions necessary
d. Adjust. To maintain, within prescribed limits, by
for the restoration of unserviceable equipment to a like new
bringing into proper or exact position, or by setting the
condition in accordance with original manufacturing
operating characteristics to specified parameters.
standards. Rebuild is the highest degree of material
maintenance applied to Army equipment. The rebuild
e. Align. To adjust specified variable elements of an
operation includes the act of returning to zero those age
item to bring about optimum or desired performance.
measurements (hours/miles, etc.) considered in classifying
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.
l. Symbols. The uppercase letter placed in the
Consists of comparisons of two instruments, one of which
appropriate column indicates the lowest level at which that
is a certified standard of known accuracy, to detect and
particular maintenance function is to be performed.