TM 10-4630-206-12&P
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8. 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 3rd position code of the SMR code.
9. 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.
NOTE
The following definitions are applicable to the "repair" maintenance
function:
Services - Inspect, test, service, adjust, align, calibrate, and/or replace.
Fault location/troubleshooting - The process of investigating and
detecting the cause of equipment malfunctioning; the act of isolating a
fault within a system or Unit Under Test (UUT).
Disassembly/assembly - The step by step breakdown (taking apart) of a
spare/functional group coded item to the level of its least component,
that is assigned an SMR code for the level of maintenance under
consideration (i.e., identified as maintenance significant).
Actions-Welding, grinding, riveting, straightening, facing, machining, and
or resurfacing,
10. 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.
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. 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.
Explanation of Columns in the MAC
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.
Column (2), Component/Assembly. Column (2) contains the names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
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