Replace. The act of substituting a serviceable like type part, subassembly, or module (compo-
nent or assembly) for an unserviceable counterpart.
Repair. The application of maintenance services (inspect, test, service, adjust, align, calibrate.
or replace) or other maintenance actions (welding, grinding, riveting, straightening, facing. re-
machining 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 complete-
ly serviceable/operational condition as prescribed by maintenance standards (i. e., DMWR)
in appropriate technical publications. Overhaul is normally the highest degree of maintenance
performed by the Army. Overhaul does not normally return an item to a like-new condition.
(11) Rebuild. Consists of those services/actions necessary for the restoration of unserviceable
equipment to a like-new condition in accordance with original manufacturing standards. Re-
build 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 equipments/components.
Maintenance Level, Column (4). This column is made up of subcolumns for each category of main-
tenance. Work time figures are listed in these subcolumns for the lowest level of maintenance au-
thorized to perform the function listed in column 3. These figures (shown directly below the symbol)
indicate the average active time required to perform the maintenance function at the indicated cate-
gory of maintenance under typical field operating condition.
Tools and Equipment, Column (5). This column is provided for referencing by code, the special tools
and test equipment (Section Ill) required to perform the maintenance functions (Section II).
Remarks, Column (6). This column should contain a letter code in alphabetical order which shall
be keyed to the remarks contained in Section IV.
EXPLANATION OF COLUMNS IN Section Ill.
Reference Code. This column consists of an Arabic number listed in sequence from column (5) of
Section II. The number references the special tools and test equipment requirements.
Maintenance level. This column shows the lowest level of maintenance authorized to use the spe-
cial tools or test equipment.
Nomenclature. This column lists the name or identification of the tools or test equipment.
National/NATO Stock Number. This column is provided for the NSN of special tools and test equip-
ment listed in the nomenclature column.
Tool Number. This column lists the manufacturer's code and part number of tools and test equip-
D-4 EXPLANATION OF COLUMNS IN Section IV.
Reference Code. This column consists of a letter code in alphabetical order which is keyed to col-
umn 6 of Section II.
Remarks. This column lists information pertinent to the maintenance function being performed, as
indicated on the MAC. Section II.