Maintenance Functions, Column (3).

TM 5-4220-201-12

in a top down breakdown sequence.

The applicable

assembly groups are listed on the MAC in disassembly

sequence beginning with the first assembly removed in a top

down disassembly sequence.

b. Assembly Group, Column (2). This column contains

a brief description of the components of each assembly

group.

c. Maintenance Functions, Column (3). This column

lists the various maintenance functions (A through K). The

lowest maintenance category authorized to perform these

functions is indicated by a symbol in the appropriate

column. The symbol designations for the various mainte-

nance categories are as follows:

C - Operator or crew

O - Organizational maintenance

F - Direct support maintenance

H - General support maintenance

D - Depot maintenance

The maintenance functions are defined as follows:

A--Inspect: To determine serviceability of an item by

comparing its physical, mechanical, and electrical

characteristics with established standards.

B--Test: To verify serviceability and to detect electrical or

mechanical failure by use of test equipment.

C--Service: To clean, to preserve, to charge, and to add

fuel, lubricants, cooling agents, and air. If it is desired

that elements such as painting and lubricating, be

defined separately, they may be so listed.

B-2