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TM 10-3930-671-24
B-2.
MAINTENANCE FUNCTIONS (CONT).
g.
Remove/Install. To remove and install the same item when required to perform service or other maintenance
functions. Install may be the act of emplacing, 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.
h.
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 3rd position code of the SMR code.
i.
Repair. The application of maintenance services’, 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.
j.
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.
1Services - Inspect, test, service, adjust, align, calibrate, and/or replace.
2Fault location/troubleshooting - The process of investigating and detecting the cause of equipment malfunctions; the
act of isolating a fault within a system or unit under test (UUT).
3Disassembly/Assembly - The step-by-step breakdown (taking apart) of a spare/functional group coded item to the
level of its least component, that is assigned an SMR code for the level of maintenance under consideration (i.e., identified
as maintenance significant).
4Actions - Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.
B-3.
EXPLANATION OF COLUMNS IN 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. End item
group number shall be "00."
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.
d.
Column (4), Maintenance Level. Column (4) specifies, by the listing of a work time figure in the appropriate sub-
column(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 levels, appropriate work time
figures will be shown for each level. 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
B-2
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