TM 9-2330-388-14
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
instruments, one of which is a certified standard of
B-1.
General
known accuracy, to detect and adjust any discrepancy in
a.
This section provides a general explanation of all
the accuracy of the instrument being compared.
maintenance and repair functions authorized at the
various maintenance levels.
g.
Remove/Install. To remove and install the same
item when required to perform service or other
b.
The maintenance Allocation Chart (MAC) in
maintenance functions.
Install may be the act of
Section II designates overall authority and responsibility
emplacing, seating, or fixing into position a spare, repair
for the performance of maintenance functions on the
part, or module (components or assembly_ in a manner
identified end item or components. The application of
to allow the proper functioning of an equipment or
the maintenance functions to the end item or component
system.
will be consistent with the capacities and capabilities of
the designated maintenance levels.
h.
Replace. To remove an unserviceable item and
install a serviceable counterpart in its place. "Replace" is
c.
authorized by the MAC and is shown as the third position
(both special tools and common tool sets required for
of the SMR code.
each maintenance function as referenced from Section
H.
i.
Repair.
The application of maintenance
services,
including
fault
location/troubleshooting,
d.
removal/installation,
and
disassembly/assembly
and explanatory notes for a particular maintenance
procedures, and maintenance actions to identify troubles
function.
and restore serviceability to an item by correcting specific
damage, fault, malfunction, or failure in a part,
B-2.
Maintenance Functions
subassembly, module (component or assembly, end
Maintenance functions will be limited to and defined as
item, or system.
follows:
j.
Overhaul. That maintenance effort (service/
a.
Inspect. To determine the serviceability of an
action) prescribed to restore an item to a completely
item by comparing its physical, mechanical, and/or
servicable/operation
condition
as
required
by
electrical characteristics with established standard
maintenance standards in appropriate technical
through examination (e.g., by sight, sound, or feel).
publication (i.e., DMWR). Overhaul is normally the
highest degree of maintenance performed by the Army.
b.
Test. To verify serviceability by measuring the
Overhaul does not normally return an item to like new
mechanical, pneumatic, hydraulic, or electrical
condition.
characteristics of an item and comparing those
characteristic with prescribed standards.
k.
Rebuild. Consists of those services/actions
necessary for the restoration of unserviceable equipment
c.
Service. Operations required periodically to
to a like new condition in accordance with original
keep an item in proper operating condition, i.e., to clear
manufacturing standards. Rebuild is the highest degree
(includes decontaminate, when required), to preserve to
of materiel maintenance applied to Army equipment.
drain, to paint, or to replenish fuel, lubricants, chemical
The rebuild operation includes the act of returning to zero
fluids, or gases.
those gage measurements (hours/miles, etc.) considered
in classifying Army equipment/ components.
d.
Adjust. To maintain or regulate, within pre
scribed limits, by bringing into proper or exact position or
B-3.
Explanation of Columns In the MAC, Section
be setting the operating characteristics to specified
parameters.
a.
Column 1, Group Number. Column 1 lists
functional group code numbers, the purpose of which is
e.
Aline. To adjust specified variable elements of
to identify maintenance significant components,
an item to bring about optimum or desired performance.
assemblies, subassemblies, and modules with the next
higher assembly. End item group number shall be "00."
f.
Calibrate. To determine and cause correction to
be made or to be adjusted on instruments or test,
measuring, and diagnostic equipment used in precision
measurement. Actions consists of comparisons of two
B-1