EXPLANATION OF COLUMNS FOR MAINTENANCE ALLOCATION CHART
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.
Column 2- Component/Assembly. Column 2 lists the noun names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
Column 3- Maintenance Functions. Column 3 lists the functions to be performed on the item
listed in Column 2.
Column 4- Maintenance Category. Column 4 specifies, by the listing of a work time figure in
the appropriate subcolumn(s), the lowest level 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 complexity of the tasks within the listed
maintenance function vary at different maintenance categories, appropriate work time figure 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 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 specified tasks identified for the maintenance functions authorized in the maintenance allocation
Maintenance levels. The subcolumns under column 4 indicate the lowest maintenance levels
authorized to perform the function listed in column 3 and are as followw
C - Operator/Crew
O- Organizational Maintenance
F - Direct Support Maintenance
H - General Support Maintenance
D - Depot Maintenance
Column 5- Special Tools and Test Equipment. Column 5 specifies by code those special tools and
test equipment required to perform the designated maintenance function. The numbers appearing in this
column correspond to the numbers used in the reference code column of the tool and test equipment
requirements (section 3).
B-2 Change 1