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TM5-4120-387-14
B-3. EXPLANATION OF COLUMNS IN THE MAC, 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.
Column 3, Maintenance Functions.
Column 3 lists the functions to be per-
formed on the item listed in column 2.
(For detailed explanation of these func-
tions, see paragraph B-2.)
d.
Column 4, Maintenance Category. Column 4 specifies, by the listing of a
work time figure in the appropriate subcolumn(s), the category 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 cate-
gory of maintenance.
If the number or complexity of the tasks within the listed
maintenance function vary at different maintenance categories, appropriate work
time figures will be shown for each category.
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 oper–
sting 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 task identified for the maintenance functions authorized in the mainte-
nance allocation chart.
The symbol designations for the various maintenance
categories are as follows:
c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operator or Crew
o . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Organizational Maintenance
F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Direct Support Maintenance
H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Support Maintenance
D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Depot Maintenance
e.
Column 5, Tools and Equipment. Column 5 specifies, by code, those common
tool sets (not individual tools) and special tools, TMDE, and support equipment
required to perform the designated function.
f.
Column 6, Remarks.
This column shall, when applicable, contain a letter
code, in alphabetic order, which shall be keyed to the remarks contained in
Section IV.
B-3
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