TM 10-4520-259-13&P
B-3. Explanation of Columns in the MAC, Section II. (CONT)
b.
Column 2, Component/Assembly. Column 2 contains the item M names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
c.
Column 3, Maintenance Functions. Column 3 lists the functions to be performed on the item listed 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 varies at different maintenance 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), troubleshooting/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:
C........................................................................ Operator or crew maintenance
O........................................................................ Unit maintenance
F ........................................................................ Direct support maintenance
L ........................................................................ Specialized Repair Activity (SRA)5
H........................................................................ General support maintenance
D........................................................................ Depot maintenance
5This maintenance level is not included in Section II, column (4) of the Maintenance Allocation Chart.
Functions to this level 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-4
