Repair. The application of maintenance services1 including fault location/troubleshooting2,
removal/installation, and disassembly/assembly3 procedures, and maintenance actions4 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), and item, or system.
j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a com-
pletely serviceable/operational condition as required by maintenance standards in appropriate technical
publications (i.e., DMWR). Overhaul in 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 service/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 and 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 names of components, assem-
blies, 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.)
1Service - Inspect, test, service, adjust, aline, calibrate, and/or replace
2Fault Iocation/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).
3Disassembly/assembly - The step-by-step breakdown (taking apartt) of a spare/functional group
coded item to the level of its least component, that is assigned as SMR code for the level of maintenance
under consideration (i.e., identification as maintenance significant).
4Actions - Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.