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TM 1-4920-458-13&P
e.
Test - to verify serviceability be measuring the mechanical, pneumatic, hydraulic, or electrical characteristics
of an item and comparing those characteristics with prescribed standards.
B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION II
a.
Column 1, Group Number - Column 1 lists functional group code numbers, the purpose of which is to identify
maintenance significant components, assemblies, subassemblies, and modules with the next higher
assembly. End item group number shall be "00".
b.
Column 2, Component/Assembly - Column 2 contains the names of components assemblies, subassemblies,
and modules for which maintenance is authorized.
c.
Column 3, Maintenance Function - Column 3 lists the functions to be performed on the item listed in Column 2.
(For detailed explanation of these functions, see paragraph B-2).
d.
Column 4, Maintenance Category-
(1)AVUM - Aviation Unit Maintenance. AVUM activities will be staffed and equipped to perform high frequency
"On-Equipment" maintenance tasks required to retain or return equipment to a serviceable condition.
(2)AVIM - Aviation Intermediate Maintenance. AVIM provides mobile, responsive "one-stop" maintenance
support. Authorized maintenance includes replace- ment and repair of module/components and end items
which can be accomplished efficiently with available skills, tools, and equipment. AVIM inspects,
troubleshoots, tests, diagnoses, repairs, adjusts, calibrates, and aligns system modules and components.
e.
Column 5, tools and Equipment - Column 5 specifies, by code, those common tool sets (not individual tools)
and special tools, TMDE, and support equipment required to perform the designated function.
f.
Column 6, Remarks - This column shall, when applicable, contain a letter code, in alphabetic order, which
shall be keyed to the remarks contained in Section IV.
B-2
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