EXPLANATION OF COLUWIS IN THE MAC, SECTION II.

TM 55-1730-228-13&P

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. Consists of comparisons 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. Remove/Install. To remove and install the same item when required to perform service or other maintenance

functions. Install may be the act of emplacing, seating, or fixing into position a spare, repair part, or module

(component or assembly) in a manner to allow the proper functioning of an equipment or system.

h. Replace. To remove an unserviceable item and install a serviceable counterpart in its place "Replace" is

authorized by the MAC and is shown as the 3d position code of the SMR code.

j. Repair. The application of maintenance services, including fault location/troubleshooting, removal/installation,

and disassembly/assembly procedures, and maintenance actions to identify troubles and 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.

k. Overhaul.

That maintenance effort (service/action) prescribed to restore an item to a completely

serviceable/operational conditions as required by maintenance standards in appropriate technical publications

(i.e., DMWR). Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul does

not normally return an item to like new condition.

l. 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-3. EXPLANATION OF COLUWIS IN THE MAC, SECTION II.

a. Column 1, Group Number. Column 1 lists functional group code numbers, the purpose of which is to identify

maintenance significant components, assemblies, subassemblies, and modules with the next higher assembly.

End item group number shall be "00."

b. Column 2, Component/Assembly. Column 2 contains the names of components assemblies, subassemblies,

and modules for which maintenance is authorized.

c. Column 3, Maintenance Function. Column 3 lists the functions to be performed on the item listed in Column 2.

(For detailed explanation of these functions, see paragraph B-2).

B-2