Explanation of Columns in Section II.

TM 9-4931-381-14&P-1

h. Replace. The act of substituting a serviceable Iiketype part, subassembly, or

module (component or assembly) for an unserviceable counterpart.

Repair. The application of maintenance services (inspect, test, service, adjust,

aline, calibrate, and/or replace) including fault location/troubleshooting, removal/installation,

disassembly /assembly, and/or other maintenance actions (welding, grinding, riveting,

straightening, facing, remachining, and resurfacing) 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.

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.

k. 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 rebuiId operation includes the act of returning to zero those age measurements

(hours/miles, etc.) considered in classifying Army equipments/components.

A-3. Explanation of Columns in Section Il.

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,

assemblies, 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 A-2.)

d. Column 4, Maintenance Category. Column 4 specifies, by the listing of a work time

figure in the appropriate subcolumn(s), the category 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 category of maintenance. If the number or complexity

of the tasks within the listed maintenance function varies 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, 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 maintenance al Iocation chart. The symbol designations

for the various maintenance categories are as follows:

Volume II

A-2

Para. A-3