ARMY TM 10-1670-282-23&P
AIR FORCE T.O. 13C5-30-2
NAVY NAVAIR 13-1-33
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.
removal/installation, and disassembly/assembly procedures, and maintenance actions to Identify trouble 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.
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.
Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipment to 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.
Explanation of Columns In the MAC, Section II.
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 shall be "00".
Column 2. Component/Assembly. Column 2 contains the names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
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).
Column 4. Maintenance Level. Column 4 specifies, by the listing of work time figure in the appropriate
subcolumn(s), the level of maintenance authorized to perform the function listed in Column 3. This figure represents the
active time required to perform the function listed in 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 will be
shown, for each level. The work time figure represents the average time required to restore an item (assembly,
subassembly, component, module and 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/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
maintenance levels are as follows:
Operator or crew
Intermediate Direct Support Maintenance
Intermediate General Support Maintenance
Column 5. Tools and Equipment. Column 5 specifies by code, those common tools sets (not individual tools)
and special tools, TMDE, and support equipment required to perform the designated function.