MAINTENANCE FUNCTION

TM 55-1520-240-23-11 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 "0.1" 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. 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 alphabetically in Section III 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 (identified by an alphabetic code in column 6) and other notes (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-6