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Section II. PACKING MATERIALS, AND ACCESSORIES
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TM-9-1375-213-12-3 Firing Decive Demolition.M122 (NSN 1375-01-021-0606) (EIC: 2NA) Manual
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EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT REQUIREMENTS
TM 9-1375-213-12-3
TO 11A20-15-1
APPENDIX C
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
C-1. GENERAL
c. Service. Operations required periodi-
cally to keep an item in proper operating condi-
tion, i.e., to clean, to preserve, to drain, to
a. This section provides a general explana-
paint, or to replenish fuel, lubricants, chemical
tion of maintenance and repair functions author-
fluids, or gases.
ized at various maintenance categories.
d, Remove/Install. To remove and install
b . The Maintenance Allocation Chart
the same item when required to perform serv-
(MAC) in section II designates overall authority
ice or other maintenance functions,  Install
and responsibility for the performance of main-
may be the act of emplacing, seating, or fixing
tenance functions on the identified end item or
into position a spare, repair part, or component
component,  The application of the mainte-
or assembly, in a manner to allow the proper
nance functions to the end item or component
functioning of the end item.
will be consistent with the capacities and capa-
bilities  of  the  designated
maintenance
e.  Replace  To remove an unserviceable
categories,
item and install a serviceable counterpart in its
place,
c. Section III lists the tools and test equip-
ment required for each maintenance function
f. Repair. The application of maintenance
as referenced in section II.
services  1 including troubleshooting2, removal/in-
stallation,  and disassembly/assembly'; proce-
d . Section IV contains supplemental
dures, and maintenance actions4 to identify trou-
instructions and explanatory notes for a particu-
bles and restore serviceability to an item by
lar maintenance function.
correcting specific damage, fault, malfunction,
or failure in a part, subassembly, component,
C-2. MAINTENANCE FUNCTIONS
end item, or system,
Maintenance functions will be limited to and
C-3. EXPLANATION OF COLUMNS IN
defined as follows:
MAC, SECTION II
a . Inspect.  To determine the serviceabil-
a. Column 1, Group Number, Column 1
ity of an item by comparing its physical, mechan-
lists functional group code numbers, the pur-
ical, and/or electrical characteristics with estab-
pose of which is to identify maintenance signifi-
lished standards through examination.
cant components, assemblies, subassemblies,
and modules with the next higher assembly.
b. Test. To verify serviceability by measur-
ing, pneumatic, hydraulic, or electrical charac-
teristics of an item and comparing those charac-
teristics with prescribed standards,
1
Services - inspect, test, service, adjust, aline, calibrate, and/or replace.
2
Troubleshooting - the process of investigating and detecting the cause of equipment malfunctioning;
the act of isolating a fault within a system or unit under test,
3
Disassemble/assemble - encompasses the step-by-step taking apart (or breakdown) of a spare/func-
tional group coded item to the level of its least componency identified as maintenance significant (i .e.,
assigned as SMR code) for the level of maintenance under consideration.
4
Actions - welding, grinding, riveting, straightening, facing, remachining, and/or resurfacing
C-1

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