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TM 55-8145-221-14&P
REFRIGERATED CONTAINER SYSTEM
MAINTENANCE ALLOCATION CHART – Continued
0048 00
EXPLANATION OF COLUMNS IN THE MAC.
Column (1) – Group Number. Column (1) lists FGC numbers, the purpose of which is to identify maintenance
significant components, assemblies, subassemblies, and modules with the Next Higher Assembly (NHA).
Column (2) – Component/Assembly. Column (2) contains the names of components, assemblies, subassemblies, and
modules for which maintenance is authorized.
Column (3) – Maintenance Function. Column (3) lists the functions to be performed on the item listed in Column
(2). (For a detailed explanation of these functions, refer to “Maintenance Functions” outlined above).
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, and quality assurance time in addition to the time required to perform the specific tasks identified for the
maintenance functions authorized in the MAC. 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)
H - General support maintenance
D - Depot maintenance
NOTE
The “L” maintenance level is not included in column (4) of the MAC. Functions to this
level of maintenance are identified by a work time figure in the “H” column of column
(4), and an associated reference code is used in the REMARKS column (6). This code is
keyed to the remarks and the SRA complete repair application is explained there.
Column (5) – Tools and Equipment. Column 5 specifies, by code, those common tool sets (not individual tools)
common TMDE, and special tools, special TMDE, and support equipment required to perform the designated function.
Column (6) Remarks – This column, when applicable, contains a letter code, in alphabetic order, which is keyed to
the remarks contained in Section IV.
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