TM 5-5420-202-20-4
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
p e r i o d i c a l l y to keep an item in proper
B-1 General
clean
i.e.,
to
condition,
operating
(decontaminate), to preserve, to drain, to
a. This section provides a general
p a i n t , or to replenish fuel, lubricants,
explanation of all maintenance and repair
air
hydraulic f l u i d s , o r compressed
various
at
authorized
functions
supplies.
maintenance levels.
Allocation
Maintenance
b. The
d. Adjust. To maintain, within pre-
C h a r t (MAC) in Section II designates
scribed limits, by bringing into proper or
overall responsibility y for the perform ante
exact position, or by setting the operating
of maintenance functions on the identified
characteristics to specified parameters.
The
component.
item
or
end
e. Align. To adjust specified variable
the
maintenance
i m p l e m e n t a t i o n of
elements of an item to bring about optimum
functions upon the end item or component
or desired performance.
w i l l be consistent w i t h the assigned
f. Calibrate. To determine and cause
maintenance functions.
corrections to be made or to be adjusted on
c. Section III lists the special tools
instruments or test measuring and diagn-
a n d test equipment required for each
ostic equipment used in precision measure-
maintenance function as referenced from
ment. Consists of comparisons of two in-
section II.
struments, one of which is a certified stan-
d. Section IV contains supplemental
d a r d of known accuracy, to detect and
instructions and explanatory notes for a
adjust any discrepancy in the accuracy of
particular maintenance function.
the instrument being compared.
T h e act of emplacing,
g. Install.
B-2 Maintenance Functions
seating, or fixing into position an item, part,
or module (component or assembly) in a
To determine the
a. Inspect.
manner to allow the proper functioning of
serviceability of an item by comparing its
an equipment or system.
physical, mechanical and/or electrical
h. Replace. The act of substituting a
characteristics with established standards
s e r v i c e a b l e like part, subassembly, or
through examination.
module (component or assembly) for an un-
b. Test. To verify serviceability and
serviceable counterpart.
detect incipient failure by measuring the
Repair. 1 The application of main-
i.
mechanical or electrical characteristics of
tenance services , including fault location/-
these
comparing
and
an
item
2
troubleshooting , removal/installation, and
3
characteristics with prescribed standards.
and
procedures,
disassembly/assembly
O p e r a t i o n s required
c. Service.
4
maintenance actions to identify troubles
1
Services - inspect, test, service, adjust, aline, calibrate, and/or replace.
2
Fault locate/troubleshoot - The process of investigating and detecting the cause of
equipment malfunctioning; the act of isolating a fault within a system or unit under test
(UUT).
3
Disassemble/assemble - encompasses the step-by-step taking apart (or breakdown) of
a spare/functional group coded item to the level of its least componency identified as
maintenance significant (i.e., assigned and SMR code) for the category of maintenance under
consideration.
4
Actions - welding, grinding, riveting, straightening, facing, remachinery, and/or
resurfacing.
