TM 55-2840-241-23
b. Test. To verify serviceability and detect in-
cipient failure by measuring the mechanical or elec-
trical characteristics of an item and comparing
those characteristics with the prescribed standards.
c. Service.
Operations required periodically to
keep an item in proper operating condition, i.e. to
clean (decontaminate), to preserve, to drain, to
paint, or to replenish fuel, lubricants, hydraulic flu-
ids, or compressed air supplies.
d. Adjust. To maintain, within prescribed lim-
its, by bringing into proper or exact position, or by
setting the operating characteristics to specified
parameter.
e. Align. To adjust specified variable elements
of an item to bring about optimum or desired per-
formance.
f. Calibrate.
To determine and cause cor-
rections to be made or to be adjusted on instruments
or test, measuring and diagnostic equipment used
in precision measurement. Consists of comparisons
of two instruments, one of which is a certified stan-
dard of known accuracy to detect and adjust any
discrepancy in the accuracy of the instrument being
compared.
g. Intall. The act of emplacing, seating or fix-
ing into position an item, part, or module (com-
ponent or assembly) in a manner to allow the proper
functioning of an equipment or system.
h. Replace. The act of substituting a ser-
viceable like type part, subassembly or module,
(component or assembly) for an unserviceable coun-
terpart.
i. Repair. The application of maintenance ser-
vices or other maintenance actions to restore ser-
viceability to an item by correcting specific damage,
fault, malfunctions or failure in a part, subassem-
bly, module (component or assembly), end item, or
system.
j. Overhaul. That maintenance effort (ser-
vice/action) necessary to restore an item to a com-
pletely serviceable/operational condition as pre-
scribed by the maintenance standard (i.e. DMWR)
in the appropriate technical publication. Overhaul
is normally the highest degree of maintenance per-
formed by the Army. Overhaul does not normally re-
turn an item to like new condition.
k. Rebuild. Consists of those cervices/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 mea-
surements (hours/miles, etc.) considered in classi-
fying Army equipments/components.
B-4. Standard Groups
The standard groupings shown below are used,
as applicable, throughout this MAC. Maintenance
manuals and RPSTLS will reflect these standard
groupings as individual chapters with sections in
each chapter relative to the individual complete
systems, subsystems, modules, components, assem-
blies, or specific parts noted.
B-5. Symbols
The letters “AVUM, AVIM and Depot” as placed
on the Maintenance Allocation Chart, indicate the
level of Maintenance responsible for performing the
particular maintenance function based upon as-
signed skills, tools and test equipment and time re-
quired to accomplish maintenance.
Change
3
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