MAINTENANCE ALLOCATION CHART
a. This section provides a general explanation
of all maintenance and repair functions author-
ized at various maintenance levels.
b. Section II designates overall responsibility
for the performance of maintenance functions
on the identified end item or component. The
implementation of the maintenance functions
upon the end item or component will be con-
sistent with the assigned maintenance functions.
c. Section III contains supplemental instruc-
tions, explanatory notes and/or illustrations re-
quired for a particular maintenance function.
B-2. Explanation of Columns in Section II
a. Group Number. The assembly group is a
numerical group assigned to each assembly in
a top down breakdown sequence. The applicable
assembly groups are listed on the MAC in dis-
assembly sequence beginning with the first as-
sembly removed in a top down disassembly
b. Assembly Group. This column contains a
brief description of the components of each as-
c. Maintenance Functions. This column lists
the various maintenance functions (A through
K) and indicates the lowest maintenance level
authorized to perform these functions.
symbol designations for the various maintenance
levels are as follows:
C-Operator or crew
The maintenance functions are defined as fol-
l o w s :
A-Inspect: To determine serviceability of
an item by comparing its physical, mechanical,
and electrical characteristics with established
To verify serviceability and to de-
tect electrical or mechanical failure by use of
C-Service: To clean, to preserve, to charge,
to paint, and to add fuel, lubricants, cooling
agents, and air.
D-Adjust: To rectify to the extent necessary
to bring into proper operating range.
To adjust specified variable ele-
ments of an item to bring to optimum perform-
To determine the corrections
to be made in the readings of instruments or test
equipments used in precise measurement.
sists of the comparisons of two instruments, one
of which is a certified standard of known ac-
curacy, to detect and adjust any discrepancy in
the accuracy of the instrument being compared
with the certified standard.
G-Install: To set up for use in an operation-
al environment such as an emplacement, site, or
To replace unserviceable items
with serviceable assemblies, subassemblies, or
To restore an item to service-
able condition. This includes, but is not limited
to, inspection, cleaning, preserving, adjusting,
replacing, welding, riveting, and strengthening.
To restore an item to a com-
pletely serviceable condition as prescribed by
maintenance serviceability standards using the
Inspect and Repair Only as Necessary (IROAN)
K-Rebuild: To restore an item to a standard
as nearly as possible to original or new condi-
tion in appearance, performance, and life ex-
pectancy. This is accomplished through com-
plete disassembly of the item, inspection of all
parts to components, repair or replacement of
worn or unserviceable elements (items) using
original manufacturing tolerances and specifica-
tions, and subsequent reassembly of the item.
d. Tools and Equipment. This column is not
e. Remarks. This column is provided for
referencing by code the remarks (sec. III) per-
tinent to the maintenance functions.
B-3. Explanation of Columns in Section III
a. Reference Code. This column consists of
two letters separated by a dash, both of which
are references to section II.
This first letter
references column (5) and the second letter
references a maintenance function, column (3),
A through K.
This column lists information
pertinent to the maintenance function being per-
formed, as indicated on the MAC, Section II.