TM 11-5841-283-12/NAVAIR 16-30APR39-1
B-2. MAINTENANCE FUNCTIONS. (CONT)
j. Overhaul. That maintenance effort (service/action) necessary to restore an item to a
completely serviceable/operational condition as prescribed by 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 condition.
k. Rebuild. Consists of those services 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 equipment components.
B-3. COLUMN ENTRIES.
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 higher assembly.
b. Column 2, Component/Assembly. Column 2 contains the noun 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. When items are listed without maintenance functions, it is solely for
purpose of having the group numbers in the MAC and RPSTL coincide.
d. Column 4, Maintenance Category. 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 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 number of task-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, 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 allocation
chart. Subcolumns of column 4 are as follows:
AVIM - Aviation Intermediate Maintenance
C
- Operator/Crew
AVUM - Aviation Unit Maintenance
O
- Organizational
F
- Direct Support
H
- General Support
L
- Special Repair Activity (SRA)
D
- Depot
e. 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.
f. 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 particular code.
B-2