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REFERENCES - TB-9-2320-364-13-P-20143
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MAINTENANCE FUNCTIONS - TB-9-2320-364-13-P-20146
TB 9-2320-364-13&P-2
MAINTENANCE ALLOCATION CHART (MAC) INTRODUCTION
THE ARMY MAINTENANCE SYSTEM
1.
This introduction provides a general explanation of all maintenance and repair functions authorized under the Two-
Level Maintenance System.
2.
The MAC for The Crew Protection Kit (Table 1, WP 0032 00) designates overall authority and responsibility for the
performance of maintenance functions on the identified end item or component. The application of the maintenance
functions to the end item or component shall be consistent with the capacities and capabilities of the designated mainte-
nance levels, which are shown in column (4) as:
Field - includes subcolumns:
C - Operator/Crew
O - Unit
F - Direct Support
Sustainment - includes subcolumns:
H - General Support
D - Depot
3.
Table 2 lists the tools and test equipment (both special tools and common tool sets) required for each maintenance func-
tion as referenced from the MAC.
4.
Table 3 contains supplemental instructions and explanatory notes for particular maintenance functions.
MAINTENANCE FUNCTIONS
Maintenance functions are limited to and defined as follows:
1.
Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical characteris-
tics with established standards through examination (e.g., by sight, sound, or feel).
2.
Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics of an item
and comparing those characteristics with prescribed standards on a scheduled basis, e.g., load testing of lift devices and
hydrostatic testing of pressure hoses.
3.
Service. Operations required periodically to keep an item in proper operating condition; e.g., to clean (includes decon-
taminate, when required), preserve, drain, paint, or replenish fuel, lubricants, chemical fluids, or gases.
4.
Adjust. To maintain or regulate, within prescribed limits, by bringing into proper position, or by setting the operating
characteristics to specified parameters.
5.
Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
6.
Calibrate. To check and adjust instruments of Test, Measurement, and Diagnostic Equipment (TMDE) used in preci-
sion measurement. Calibration consists of comparisons of two instruments, one of which is a certified standard of
known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared.
7.
Remove/Install. To remove and install the same item when required to perform service or other maintenance functions.
Installation may be the act of emplacing or seating a spare, repair part, or module (component or assembly) into position
in a manner to allow the proper functioning of equipment or a system.
8.
Replace. To remove an unserviceable item and install a serviceable counterpart in its place. Replacement is authorized
by the MAC, and the assigned maintenance level is shown as the third position code of the Source, Maintenance and
Recoverability (SMR) code.
9.
Repair. Repair is the application of maintenance services, including fault location/troubleshooting, removal/installation,
disassembly/assembly procedures, and maintenance actions to identify troubles and restore serviceability to an item by
correcting specific damage, fault, malfunction, or failure in a part, subassembly, module (component or assembly), end
item, or system.

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