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TM 9-2320-304-14&P
B-1
APPENDIX B
MAINTENANCE ALLOCATION CHART (MAC)
B-1. GENERAL.
This Maintenance Allocation Chart designates responsibility for performance of maintenance repair functions
at specified maintenance levels.
a. Section I is a general explanation and definitions of terms.
b. Section II shows the maintenance level responsible and estimated work measurement time for specific
functions.
c. Section III lists common tool sets and the special tools and test and support equipment required for
each maintenance function shown in Section III.
B-2. EXPLANATION OF COLUMNS IN SECTION II.
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.
d. Column 4, Maintenance Level. 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
category of maintenance. If the number or category of the tasks within the listed maintenance function
varies at different maintenance categories, appropriate “work time” figure represents the average time
required to restore an item (assembly, subassembly, components, 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 chart. This figure
does not include any time for performance of preliminary tasks listed elsewhere in the MAC (e.g., removal
of engine under repair of fuel pump when the engine is listed separately in the MAC). The symbol
designations for the various maintenance categories remain as follows:
C - Operator/Crew
O - Organizational Maintenance
F -- Direct Support Maintenance
H - General Support Maintenance
e. Column 5, Tools & Equipment. Column 5 specifies the code, those common tool sets (not individual
tools) and special tools, test, and support equipment required to perform the designed functions.
f. Column 6, Remarks. Column 6 references any amplifying remarks.
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