ARMY TM 9-2805-258-14
AIR FORCE TO 38G2-89-21
NAVY NAVFAC P-8-614-14E
c. Service. Operations required periodically to keep an item in proper operating condition, i.e., to clean
(includes decontaminate), to preserve, to drain, or to replenish fuel, lubricants, hydraulic fluids, or compressed air
supplies.
d. Adjust. To maintain within prescribed limits, by bringing into proper or exact position, or by setting the
operating characteristics to the specified parameters.
e. Aline. To adjust specified variable elements of an item to bring about optimum or desired performance.
f. Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test
measuring and diagnostic equipment used in precision measurement. Consists of comparison of two instruments,
one of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the
instrument being compared.
g. Install. The act of emplacing, seating, or fixing into position an item, part, or module (component assembly)
in a manner to allow the proper functioning of an equipment or system.
h. Rep/ace. The act of substituting a serviceable like type part, a subassembly, or module (component or
assembly) for an unserviceable counterpart.
i. R e p a i r. The application of maintenance services (inspect, test, service, adjust, aline, 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.
j. O v e r h a u l. That maintenance effort (service/action) necessary to restore an item to a completely
serviceable operational condition as prescribed by maintenance standards in appropriate technical publications
(i.e., DMWR). Overhaul does not normally return an item to a like new condition.
k. Rebuild. Consists of those services/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
measurements (hours/miles, etc.) considered in classifying Army equipment/components.
B-4. Explanation of Columns in the MAC, Section Il.
a.
Column [1), Group Number. Column 1 lists functional group code numbers which are assigned to identify
maintenance significant components, assemblies, subassemblies, and modules to their next higher assembly.
b.
Column (2). Component / A s s e mbly. Column 2 contains the item names of components, assemblies,
subassemblies, and modules for which group numbers (column 1 ) are assigned and for which maintenance is
authorized.
c.
Column (2) Maintenance F u n c t i o n . Column 3 lists the functions to be performed on items listed in Column
2. (Function definitions are contained in paragraph A-3.)
B-2
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