returning to zero those age measurements (hours,
cal characteristics of an item and comparing those
miles, etc) considered in classifying Army equip-
characteristics with prescribed standards.
ment/components.
c. Service. Operations required periodically to
keep an item in proper operating condition, i.e., to
clean, preserve, drain, paint, or to replenish fuel/lu-
A2-3. Column Entries
bricants/hydraulic fluids or compressed air supplies.
a. Column 1, Group Number. Column 1 lists
d. Adjust. Maintain within prescribed limits by
bringing into proper or exact position, or by setting
group numbers, the purpose of which is to identify
components, assemblies, subassemblies and modules
the operating characteristics to the specified para-
with the next higher assembly.
meters.
e. Align. To adjust specified variable elements of
b. Column 2, Component/Assembly. Column 2
contains the noun names of components, assemblies,
an item to about optimum or desired performance.
subassemblies, and modules for which maintenance
f. Calibrate. To determine and cause corrections
is authorized.
to be made or to be adjusted on instruments or test
c. Column 3, Maintenance Functions. Column 3
measuring and diagnostic equipment used in preci-
lists the functions to be performed on the item listed
sion measurement. Consists of the comparison of two
in column 2. When items are listed without main-
instruments, one of which is a certified standard
tenance functions, it is solely for purpose of having
of known accuracy, to detect and adjust any dis-
the group numbers in the MAC and RPSTL coincide.
crepancy in the accuracy of the instrument being
d. Column 4, Maintenance Category. Column 4
compared.
specifies, by the listing of a "worktime" figure in the
g. Install. The act of emplacing, seating, or fixing
appropriate subcolumn(s), the lowest level of main-
into position an item, part, module (component or
tenance authorized to perform the function listed in
assembly) in a manner to allow the proper func-
column 3. This figure represents the active time re-
tioning of the equipment/system.
quired to perform that maintenance function at the
h. Replace. The act of substituting a serviceable
indicated category of maintenance. If the number or
like-type part, sub-assembly, model (component or
complexity of the tasks within the listed maintenance
assembly) for an unserviceable counterpart.
function vary at different maintenance categories,
i. Repair. The application of maintenance services
appropriate "worktime" figures will be shown for
(inspect, test, service, adjust, align, calibrate, re-
each category. The number of task-hours specified by
place) or other maintenance actions (welding, grind-
the "worktime" figure represents the average time
ing, riveting, straightening, facing, remachining, or
required to restore an item (assembly, subassembly,
resurfacing) to restore serviceability to an item by
component, module, end item or system) to a service-
correcting specific damage, fault, malfunction, or
able condition under typical field operating condi-
failure in a part, subassembly, module/component/
tions. This time includes preparation time, trouble-
assembly, end item or system. This function does not
include the trial and error replacement of running
shooting time and quality assurance/quality control
time in addition to the time required to perform the
spare type items such as fuses, lamps, or electron
specific tasks identified for the maintenance func-
tubes.
j. Overhaul. That periodic maintenance effort
tions authorized in the maintenance allocation chart.
(service/action) necessary to restore an item to a com-
Subcolumns of column 4 areas follows:
pletely serviceable/operational condition as pre-
C -- Operator/Crew
scribed by maintenance standards (e.g., DMWR) in
O Organizational
appropriate technical publications. Overhaul is nor-
F Direct Support
mally the highest degree of maintenance performed
H -- General Support
by the Army. Overhaul does not normally return an
D Depot
item to like-new condition.
k. Rebuild. Consists of those services/actions nec-
essary for the restoration of unserviceable equipment
e. Column 5, Tools and Equipment. Column 5
to a like-new condition in accordance with original
specifies by code, those common tool sets (not indi-
vidual tools) and special tools, test, and support
manufacturing standards. Rebuild is the highest
equipment required to perform the designated func-
degree of material maintenance applied to Army
equipment. The rebuild operation includes the act of
tion.
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