FUNCTIONAL GROUPS. - TM-55-4920-411-13-P0054

established, the columnar presentation shall in-

B-4. FUNCTIONAL GROUPS.

dicate

Maintenance levels higher than

the level of maintenance indicated are authorized

Standard functional groupings are not con-

to perform the indicated function.

sidered feasible for aviation ground support equip-

ment due to variation and complexity. Therefore,

variations to functional groupings may occur.

B-6. TOOLS AND TEST EQUIPMENT (Section

III).

B-5. MAINTENANCE CATEGORIES AND

Common tool sets (not individual tools), special

WORK TIMES.

tools, test and support equipment required to per-

form maintenance functions are listed

The maintenance categories (levels) AVUM,

alphabetically with a reference number to permit

AVIM, and Depot are listed on the Maintenance

cross-referencing to column 5 in the MAC. In ad-

Allocation Chart with individual columns that in-

dition, the maintenance category authorized to use

dicate the work times for maintenance functions at

the device is listed along with the item National

each maintenance level. Work time presentations

Stock Number (NSN) and, if applicable, the tool

such as 0.1 indicate the average time it requires a

number to aid in identifying the tool/device.

maintenance l e v e l t o p e r f o r m a s p e c i f i c

maintenance function. If a work time has not been

Change 1 B-3