EXPLANATION OF MAC COLUMN ENTRIES.

TM 11-7025-233-23

h. Replace. Substitution of a serviceable like-type part, subassembly, or

module (component or assembly) for an unserviceable counterpart.

i. Repair. Application of maintenance services (inspect, test, service, adjust,

aline, calibrate, replace) or other maintenance actions (welding, grinding,

riveting, straightening, facing, remachining, or resurfacing) to restore

serviceability to an item by correcting specific damage, fault, malfunction, or

failure in a part, subassembly, module/component/assembly, and item or system.

This function does not include trial and error replacement of consumable spare type

items such as fuses, lamps, or electronic tubes.

j. Overhaul. Periodic maintenance effort (service/action) necessary to restore

an item to a completely serviceable/operational condition as prescribed by

maintenance standards (e.g., DMWR) in appropriate technical publications. 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. 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 (hour, miles, etc.) considered in

classifying Army equipment/components.

B-3. EXPLANATION OF MAC COLUMN ENTRIES.

a. Group Number. This column lists group numbers, the purpose of which is to

identify components, assemblies, subassemblies and modules with the next highest

assembly.

b. Component/Assembly. This column contains the noun names of components,

assemblies, subassemblies, and modules for which maintenance is authorized.

c. Maintenance Function. This column lists the functions to be performed on the

item listed in the Component/Assembly column.

d. Maintenance Category. This column specifies, by the listing of a "worktime"

fiqure in the appropriate subcolumn(s), the lowest level of maintenance authorized

to-perform the function listed in the Maintenance Function column. This figure

represents the active time required to perform that maintenance function at the

indicated category of maintenance. If the number or complexity of the tasks within

the listed maintenance function varies at different maintenance categories,

appropriate "worktime" figures will be shown for each category. The number of

man-hours specified by the "worktime" 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, troubleshooting 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 MAC.

B-2