EXPLANATION of COLUMNS in the MAC, SECTION II

TM 9-6115-661-13&P

B-2.7 Remove/Install. To remove and install the same item when required to perform service or other

maintenance functions. Install may be the act of placing, seating, or fixing into position a spare, repair

part, or module (component or assembly) in a manner to allow the proper functioning of an equipment or

system.

B-2.8. 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 3d position code of the SMR code.

B-2.9. Repair. The application of maintenance servicesl, 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), end item, or system.

B-2.10. 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

publication (i.e., DMWR). Overhaul does not normally return an item to like new condition.

B-2.11. 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 materiel maintenance applied to Army equipment. The rebuild operation includes the

act of returning to zero those age measurement (hour/miles, etc.) considered in classifying Army

equipment/components.

B-3. EXPLANATION of COLUMNS in the MAC, SECTION II

B-3.1. 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 number shall be "00."

B-3.2. Column 2, Component/Assembly. Column 2 contains the names of components, assemblies,

subassemblies, and modules for which maintenance is authorized.

B-3.3. 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.)

B-3.4. Column 4, Maintenance Level. Column 4 specifies, by the listing of a 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 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 categories, appropriate work time figures will be shown for each category. 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 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

Services - inspect, test, service, ajust, aline, calibrate, and/or replace.

Fault

locate/troubleshoot

The

process

investigating

and

detecting

the

cause

equipment

malfunctioning;

the

act

isolating a fault within a system or unit under test (UUT).

Disassemble/assemble

encompasses

the

step-by-step

tahing

apart

(or

breakdown)

spare/functional

group

coded

item

to the level of its least componency identified as maintenance significant (i.e., assigned an SMR code) for the level of maintenance

under consideration.

Actions

welding,

grinding,

riveting,

straightening,

fining

remachinery,

and/or

resurfacing.

B-2