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 TM
9-2350-238-20-2
M A I N T E N A N C E FUNCTIONS
(CONT).
B-2.
f. C a i b r a t e . T o d e t e r m i n e a n d c a u s e c o r r e c t i o n s t o b e m a d e o r t o b e a d j u s t e d o n i n s t r u m e n t s
or
test,
measuring,
and
diagnostic
equipments
used
in
precision
measurement.
Consists
of
com-
parisons
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.
g. R e m o v e / I n s t a l l . To
remove
and
install
the
same
item
when
required
to
perform
service
or
other maintenance functions. Install may be the act of emplacing, seating, or fixing into a posi-
tion a spare, repair part, or module (component or assembly) in a manner to allow the proper
functioning of an equipment or system.
h. R e p l a c e . To remove
an unserviceable item and install a serviceable counterpart
in its place.
"Replace" is authorized by
the MAC and is shown as the third position code of the
SMR code.
i. R e p a i r . T h e a p p l i c a t i o n o f m a i n t e n a n c e s e r v i c e s2 , i n c l u d i n g
l o c a t i o n / t r o u b l e s h o o t i n g3 ,
fault
r e m o v a l / i n s t a l l a t i o n , a n d d i s a s s e m b l y / a s s e m b l y4 p r o c e d u r e s ,
a c t i o n s5 t o
and
maintenance
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.
j. O v e r h a u l . T h a t m a i n t e n a n c e e f f o r t ( s e r v i c e / a c t i o n ) p r e s c r i b e d t o r e s t o r e a n i t e m t o a c o m -
pletely serviceable/operational condition as required by maintenance standards in appropriate
technical publications (i.e., DMWR). Overhaul is normally the highest degree of maintenance per-
formed
by
the
Army.
Overhaul
does
not
normally
return
an
item
to
like
new
condition.
k. R e b u i l d . C o n s i s t s o f t h o s e s e r v i c e s / a c t i o n s n e c e s s a r y f o r t h e r e s t o r a t i o n o f u n s e r v i c e a b l e
equipment to a like new condition in accordance with original manufacturing standards. Rebuild
is the highest degree of material maintenance applied to Army equipment. The rebuild operation
includes the act of returning to zero those age measurements (hours/miles, etc.) considered in
classifying Army equipment/components.
B-3. EXPLANATION OF COLUMNS IN THE MAC, SECTION II.
a. C o l u m n 1 , G r o u p N u m b e r . C o l u m n 1 l i s t s f u n c t i o n a l g r o u p c o d e n u m b e r s , t h e p u r p o s e o f
which is to identify maintenance significant components, assemblies, subassemblies, and
modules with the next higher assembly. End item group number shall be ″ 0 0 ″ .
b. C o u m n 2 , C o m p o n e n t / A s s e m b l y . Column 2 contains the names of
components,
assem-
blies, subassemblies, and modules for which maintenance is authorized.
2
Servicesinspect, test, service, adjust, aline, calibrate, and/or replace.
3
Fault location/troubleshooting--the process of investigating and detecting the cause of equip-
ment malfunctioning; the act of isolating a fault within a system or unit under test (UUT).
4
Disassembly/assembly--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 an SMR code) for the level of maintenance under consideration.
5
Actions--welding, grinding, riveting, straightening, facing, remachining, and/or resurfacing.
B-2
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