TM 5-1730-245-14
f. Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test,
measuring or diagnostic equipment's 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 die 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 third position code of the SMR code.
i.
Repair.
The application of maintenance services, including fault location/troubleshooting,
removal/installation, 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.
j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely
serviceable/operational condition 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.
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
material 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 COLUMNS 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.
b. Column 2, Component/Assembly. Column 2 contains the Item 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.
d. Column 4, Maintenance Level. Column 4 specifies each level of maintenance authorized to perform
each function listed in column 3, by indicating work time required (expressed as man hours in whole hours or
decimals) in the appropriate subcolumn. This work time figure represents the active time required to perform
that maintenance at the indicated level of maintenance. If the number or complexity of the tasks within the
listed maintenance function vary at different maintenance levels, appropriate work time figures are to be shown
for each level. The work time figure represents the average time required to restore an item (assembly,
subassembly, component, module, end item or system) to a serviceable condition under typical field operating
conditions. This time includes preparation time (including any necessary disassembly/assembly time),
troubleshooting/fault location time, and quality assurance time in addition to the time required to perform the
specific tasks identified for the maintenance functions authorized in the maintenance allocation chart. The
symbol designations for the various maintenance levels are as follows:
B-2