B-2, MAINTENANCE FUNCTIONS - CONT
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 in the maintenance function
column (3), Section II.
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, malfunctions, 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 ap-
propriate 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
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 COLUMNS IN THE MAC, SECTION II
a. Column (1) - Group Number. Column 1 lists functional group code numbers, the pur-
pose of which is to identify maintenance significant components, assemblies, subassemblies,
and modules with the next higher assembly. End item group number shall be 7411.
b. Column (2) - Component/Assembly. Column 2 contains the names of components, as-
semblies, 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.)
d. Column (4) - Maintenance Level. Column 4 specifies, by the listing of a work time
figure in the appropriate subcolumn( the level of maintenance authorized to perform the
function listed in Column 3. This figure represents the active time required to perform that
maintenance function at the indicated level of maintenance. If the number or complexity of
the tasks within the listed maintenance function vary at different maintenance levels appro-
priate work time figures will 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
time (including any necessary disassembly/assembly time),
troubleshooting/fault location time, and quality assurance/quality control 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 main-
tenance levels are as follows: