TM 55-1930-209-14&P-18
h. Replace. The act of substituting a serviceable like type part, subassembly, or module (component or
assembly) for an unserviceable counterpart.
i. Repair. The application of maintenance services (inspect, test, service, adjust, align, calibrate, or 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 or assembly), end item, or system.
j. Overhaul. That maintenance effort (services/actions) necessary to restore an item to a completely
serviceable/operational condition as prescribed by maintenance standards (i. e. , DMWR) in appropriate technical
publications. 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 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.
C-3
COLUMN ENTRIES
Columns used in the maintenance allocation chart will be limited to those shown. Entries for those columns are
explained below.
a. Column 1. Group Number. Column 1 lists group numbers, the purpose of which is to identify components,
assemblies, subassemblies, and modules with the next high assembly.
b. Column 2. Components/Assembly. Column 2 contains the noun names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
c. Column 3. Maintenance Functions. Column 3 lists the functions to be performed on the items listed in
Column 2. (For detailed explanation of these functions see paragraph B-2.)
d. Column 4. Maintenance Level. Column 4 specifies, by the listing of a "work time" figure in the appropriate
subcolumn(s), the lowest level of maintenance authorized to perform the function listed in Column 3. This figure
presents the active time required to perform the maintenance function at the indicated level of maintenance. If the
number or complexity of the tasks within the listed maintenance functions varies at different maintenance levels, an
appropriate "work time” figure will be shown for each level. The number of man-hours specified by 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. The symbol designations for the various maintenance levels are as follows:
B-2
