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![]() TM 9-1270-219-13&P 
MAINTENANCE 
ALLOCATION 
CHART 
Section 
I. 
INTRODUCTION 
i s a certified standard of k n o w n a c c u r a c y , t o d e t e c t a n d 
D-1 
General 
a d j u s t any discrepancy in t h e a c c u r a c y o f t h e i n s t r u m e n t 
a . This section provides a general explanation of all 
being compared. 
maintenance 
and 
repair 
functions 
authorized 
at 
various 
maintenance levels. 
g. Install. T h e 
a c t o f emplacing, seating, or fixing 
into position an item, part, or module (component or 
b. 
The 
Maintenance 
Allocation 
Chart 
(MAC) 
in 
a s s e m b l y ) in a manner to allow the proper functioning of 
Section 
II 
designates 
overall 
responsibility 
for 
the 
an equipment or system. 
performance of maintenance functions on the identified 
e n d item or component. The implementation of the maint- 
h. R e p l a c e . The act of substituting a serviceable like 
e n a n c e functions upon the end item or component will be 
type 
part, 
subassembly, 
or 
module 
(component 
or 
consistent 
with 
the 
assigned 
maintenance 
functions. 
assembly) 
for 
an 
unserviceable 
counterpart. 
c. 
Section 
III 
lists 
the 
special 
tools 
and 
test 
R e p a i r . The  application  of  maintenance  services 
j. 
equipment required for each maintenance function as 
or other manitenance actions to restore serviceability to an 
r e f e r e n c e d from Section II. 
i t e m by correcting specific damage, fault, malfunction, or 
failure in a part, subassembly, module (component or 
d. 
Section 
IV 
contains 
supplemental 
instructions 
and 
assembly) end item, or system. 
explanatory notes for a particular maintenance function. 
k. O v e r h a u l . 
That 
maintenance 
effort 
(service/ 
D-2. Maintenance Functions 
actions) 
necessary 
to 
restore 
an 
item 
to 
a 
completely 
condition 
as 
serviceable/operational 
prescribed 
by 
I n s p e c t . To determine the serviceability of an item 
a. 
maintenance 
standards (ie,, 
DMWR) 
in 
appropriate 
by 
comparing 
its 
physical, 
mechanical 
and/or 
electrical 
technical publications. Overhaul is normally the highest 
characteristics 
through 
with 
established 
standards 
degree of maintenance performed by the Army. Overhaul 
examination. 
does not normally return an item to like new condition. 
b. T e s t . T o v e r i f y s e r v i c e a b i l i t y a n d d e t e c t i n c i p i e n t 
l. 
Rebuild. 
Consists 
of 
those 
services/actions 
measuring 
the 
mechanical 
or 
electrical 
failure 
by 
necessary for the restoration of unserviceable equipment to 
characteristics of an item and comparing those character- 
a like new condition in accordance with original manufact- 
istics with prescribed standards. 
u r i n g standards. Rebuild is the highest degree of materiel 
maintenance 
applied 
to 
Army 
equipment. 
The 
rebuild 
c. S e r v i c e . O p e r a t i o n s r e q u i r e d p e r i o d i c a l l y t o k e e p 
o p e r a t i o n includes the act of returning to zero those age 
an 
item 
in 
proper 
operating 
condition, 
ie 
to 
clean 
measurements (hours/weeks, etc) considered in classifying 
(decontaminate), 
to 
preserve, 
to 
paint, 
or 
to 
replenish 
Army 
equipments/components. 
D-3. Explanation of Columns in the MAC, Section II 
d. A d j u s t . T o m a i n t a i n , w i t h i n p r e s c r i b e d l i m i t s , b y 
bringing into proper or exact position, or by setting the 
a. C o l u m n 1 , G r o u p N u m b e r . Column 1 lists group 
operating 
characteristics 
to 
specified 
parameters. 
numbers, the purpose of which is to identify components, 
assemblies, 
subassemblies, 
and 
modules 
with 
the 
next 
e. A l i g n . T o 
adjust 
specified 
variable 
elements 
of 
higher 
assembly. 
an item to bring about optimum or desired performance. 
b. C o l u m n 
2, 
Component/Assembly. 
f. C a l 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 
Column 
2 
contains 
the 
names 
of 
components, 
assemblies, 
sub- 
be made or to be adjusted on instruments or test measuring 
assemblies, 
and 
modules 
for 
which 
maintenance 
is 
a n d diagnostic equipment used in precision measurement. 
authorized. 
Consists of comparisons of two instruments, one of which 
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