TM 55-1680-320-23 & P
B-5. Maintenance Function
(Column 3). Column 3 lists the functions to be performed on the items listed in
column 2.
B-6. Maintenance Categories and Work Times (Column 4). The maintenance categories (levels) AVUM, AVIM
and DEPOT are listed on the Maintenance Allocation Chart with individual columns that include the work times for
maintenance functions at each maintenance level. Work time presentations such as “O. 1“ indicate the average time
it requires a maintenance level to perform a specified maintenance function. If a work time has not been established,
the columnar presentation shall indicate “-.-”.
Maintenance levels higher than the level of maintenance indicated
are authorized to perform the indicated function.
Numbers in parentheses identify the correspondingly numbered
remarks in Section IV.
B-7. Tools and Test Equipment
(Column 5 and Section III). Common tool sets (not individual tools), special
tools, test and support equipment required to perform maintenance functions are listed in Section 111 with a reference
number to permit cross-referencing to column 5 in the MAC. In addition, the maintenance category authorized to
use the device is listed along with the item National Stock number (NSN) and, if applicable, the tool number to aid
in identifying the tool / device.
B-8. Remarks
(Column 6 and Section IV). Remarks and other notes, if applicable (identified by a number in
parentheses in the applicable column) are listed in Section IV to provide a ready reference to the definition of the
remark / note.
B-5
