ARMY TM 9-1290-262-24&P
MARINE CORPS TM 00476C-24&P
AIR FORCE TO 49A7-3-72/74
B-3. EXPLANATION OF COLUMNS IN THE MAC, 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 item 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
Iisted in Column 2. (For detailed explanation of these functions, see paragraph B-2.)
d. Column 4, Maintenance Level. Column 4 specifies each level of maintenance authorized to
perform each function listed in Column 3, by indicating work time required (expressed as man-hours
in whole hours or decimals) in the appropriate subcolumn. This work-time 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 mainte-
nance levels, appropriate work-time figures are to 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), troubleshoot-
ing/fault location time, and quality assurance time in addition to the time required to perform the
specific tasks identified for the maintenance functions authorized in the maintenance allocation chart.
The symbol designations for the various maintenance levels are as follows:
.
.
.........................
Operator or crew maintenance
C
Unit maintenance
.
.
.........................
0
Direct support maintenance
F
.
.
.........................
Specialized Repair Activity (SRA)5
L
.
.
........................
General support maintenance
H
.
.
.........................
Depot maintenance
D
.
.
.........................
e. Column 5, Tools and Test Equipment reference code. Column 5 specifies, by code, those
common tools sets (not individual tools), common TMDE, and special tools, special TMDE, and
special support equipment required to perform the designated function. Codes are keyed to tools and
test equipment in Section Ill.
f. Column 6, Remarks. When applicable, this column contains a letter code, in alphabetical
order, which is keyed to the remarks contained in Section IV.
5
This maintenance level is not included in Section II, column 4 of the Maintenance Allocation Chart.
Functions to this Ievel of maintenance are identified by a work-time figure in the "H" column of
Section II, column (4), and an associated reference code is used in the Remarks column 6. This
code is keyed to Section IV, Remarks, and the SRA complete repair application is explained there.
B-3
