NAVELEX EE 181-AA-OMI-100/E121 DZ-204
Overhaul. That maintenance effort (service/
actions) necessary to restore an item to a completely
maintenance standards (i.e., 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
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 measurements (hours/miles, etc.) considered
in classifying Army equipments/components.
Column 1, Group Number. Column 1 lists
group numbers, the purpose of which is to identify
components, assemblies, subassemblies, and modules
with the next higher assembly.
Column 2, Component/Assembly. Column 2
subassemblies, and modules for which maintenance is
Column 3, Maintenance Function. Column 3
lists the functions to be performed on the item listed in
Column 4, Maintenance Level. Column 4
specifies, by the listing of a "work time" figure in the
maintenance authorized to perform the function listed in
column 3.This figure represents 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 function varies at
different maintenance levels, appropriate "work time"
figures 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 under typical field operating
conditions. This time includes preparation time,
control time in addition to the time required to perform
functions authorized in the maintenance allocation chart.
The symbol designations for the various maintenance
levels are as follows:
C....................... Operator or crew
O ...................... Organization maintenance
F ....................... Direct support maintenance
H....................... General support maintenance
D....................... Depot maintenance
Column 5, Tools and Equipment. Column 5
specifies, by code, those common tool sets (not
individual tools) and special tools, test, and support
equipment required to perform the designated function.
Column 6, Remarks. Column 6 contains an
alphabetic code which leads to the remark in section IV,
Remarks, which is pertinent to the item opposite the