MAINTENANCE ALLOCATION CHART
Section
I.
INTRODUCTION
C-1. General
B -- Test: To verify serviceability a n d d e t e c t
incipient failure by measuring the mechanical or
a. This section provides a general explanation of
e l e c t r i c a l characteristics of an item and comparing
a l l maintenance and repair functions authorized at
t h o s e characteristics with prescribed standards.
v a r i o u s maintenance levels.
C -- Service: Operations required periodically to
b. Section II designates overall responsibility for
keep an item in proper operating condition, i.e., to
t h e performance of maintenance functions on the
clean, to preserve, to drain, to paint, or to replenish
identified end item or component and the work
fuel, lubricants, hydraulic fluids, or compressed air
measurement time required to perform the func
supplies.
tions by the designated maintenance level. The
D -- Adjust: To maintain within prescribed
i m p l e m e n t a t i o n of the maintenance functions upon
limits, by bringing into proper or exact position, or
t h e end item or component will be consistent with
by setting the operating characteristics to specified
the
assigned
maintenance
functions.
parameters.
c. S e c t i o n I I I l i s t s t h e s p e c i a l t o o l s a n d t e s t
E -- Aline: To adjust specified variable elements
e q u i p m e n t required for each maintenance function
of an item to bring about optimum or desired
a s referenced from Section II.
performance.
d. Section IV contains supplemental instructions
F -- Calibrate: To determine and cause
o r explanatory notes for a particular maintenance
corrections to be made or to be adjusted on in-
function.
struments
or test
measuring
and diagnostic
C - 2 . Explanation of Columns in Section II
equipments
used in
measurement.
precision
a. Column (1), Group Number. A number is
C o n s i s t s of comparisons of two instruments, one of
a s s i g n e d to each group in a top down breakdown
which is a certified standard of known accuracy, to
s e q u e n c e . The applicable groups are listed on the
d e t e c t and adjust any discrepancy in the accuracy
M A C in disassembly sequence beginning with the
of the instrument being compared.
f i r s t group removed.
G -- Install: The act of emplacing, seating, or
b. Column (2), F u n c t i o n a l G r o u p . T h i s c o l u m n
fixing into position an item, part, or module
c o n t a i n s a brief description of the components of
( c o m p o n e n t or assembly) in a manner to allow the
each numerical group.
proper functioning of an equipment or system.
c. Column (3), Maintenance Functions. T h i s
H -- R e p l a c e : The act of substituting a serv-
c o l u m n lists the various maintenance functions (A
iceable like type part, subassembly, or module
through K). The lowest maintenance level
(component or assembly) for an unserviceable
a u t h o r i z e d to perform these functions is indicated
counterpart.
by a symbol in the appropriate column. Work
I-- Repair: The application of maintenance
measurement time standards (the active repair time
services (inspect, test, service, adjust, aline,
r e q u i r e d to perform the maintenance function) are
c a l i b r a t e , or replace) or other maintenance actions
shown directly below the symbol identifying the
( w e l d i n g , grinding, riveting, straightening, facing,
m a i n t e n a n c e level. The symbol designations for the
remachining or resurfacing) to restore serviceability
v a r i o u s maintenance levels are as follows:
to an item by correcting specific damage, fault,
C. . . . Operator or crew
malfunction, or failure in a part, subassembly,
O . . . . Organization maintenance
module (component or assembly), end item, or
F. . . .Direct support maintenance
system.
H. . . . General support maintenance
D. . . . Depot maintenance
J-- Overhaul:
That
maintenance
effort
(serv-
ice / action) necessary to restore an item to a
T h e maintenance functions are defined as follows:
completely serviceable / operational condition as
A -- Inspect: To determine serviceability of an
prescribed by maintenance standards (i.e., DM
item by comparing its physical, mechanical, and
WR) in appropriate
technical publication.
e l e c t r i c a l characteristics with established standards
Overhaul is normally
the highest degree of
through examination.
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