Column Entries: Columns

TM 10-3990-203-13&P

3. Column Entries: Columns used in the MAC are explained below:

a. Column 1 - Group Number: Column One (1) lists group numbers, the

purpose of which is to identify components, assemblies, subassemblies and

modules with their next higher assemblies.

b. Column 2 - Component/Assembly: Column Two (2) contains the noun

names of components, assemblies, subassemblies and modules for which mainte-

nance is authorized.

c. Column 3 - Maintenance Functions: Column Three (3) lists the functions

to be performed on the item listed in Column 2.

d. Column 4 - Maintenance Category: Column Four (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 serviceable condition under typical field

operating conditions. This time includes preparation time, troubleshooting

quality assurance/quality control time in addition to the time re-

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., re-

moval of engine under repair of fuel pump when the engine is listed separately

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