TM 9-2320-279-20-3
APPENDIX B
MAINTENANCE ALLOCATION CHART
FOR
M977 SERIES VEHICLES
Section I. INTRODUCTION
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 definition 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. test and support equipment required for each
maintenance function shown in Section II.
d. Section IV lists the remarks referenced in Section II.
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 Functions. Column 3 lists the functions to be performed on the item
listed in Column 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 category of maintenance. If the number or category of the tasks within the listed maintenance
function vary at different maintenance categories, appropriate
“work time” figures will be shown for each
category. The number of man-hours specified by the “work time” figure represents the average time,
required to restore an item (assembly, subassembly, component. module. end item. or system) to a
senrviceable 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 and Equipment. Column 5 specifies the code, those common tool sets (not
individual tools) and special tools, test, and support equipment required to perform the designated
functions.
f. Column 6, Remarks. Column 6 references any amplifying remarks.
B-l
