MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
D Adjust. To rectify to the extent necessary to
bring into proper operating range.
a. This section provides a general explanation of
E Align. To adjust specified variable elements of
all maintenance and repair functions authorized at
an item to bring to optimum performance.
various maintenance levels.
. Calibrate. To determine the corrections to be
b. Section II designates overall responsibility for
made in the readings of instruments or test
the performance of maintenance functions on the
equipment used in precise measurement.
identified end item or component. The implementation
Consists of the comparison of two instruments,
of the maintenance functions upon the end item of
one of which is a certified standard of known
component will be consistent with the assigned
accuracy, to detect and adjust any discrepancy
in the accuracy of the instrument being
compared with the certified standard.
c. Section III not applicable.
G Install. To set up for use in an operational
d. Section IV not applicable.
environment such as an emplacement, site or
B-2. Explanation of Columns In Section II
H Replace. To replace unserviceable items with
a. Group Number, Column (1). The assembly
serviceable like items.
group is a numerical group assigned to each assembly
in a top down breakdown sequence. The applicable
Those maintenance operations
assembly group are listed on the MAC in disassembly
necessary to restore an item of serviceable
sequence beginning with the first assembly removed in
condition through correction of material damage
a top down disassembly sequence.
or a specific failure.
Repair may be
accomplished at each level of maintenance.
b. Assembly Group, Column (2). This column
J Overhaul. Normally, the highest degree of
contains a brief description of the components of each
maintenance performed by the Army in order to
minimize time work in process is consistent with
c. Maintenance Functions, Column (3).
quality and economy of operation. It consists of
column lists the various maintenance functions (A
that maintenance necessary to restore an item
through K) and indicates the lowest maintenance level
to completely serviceable condition as
authorized to perform these functions. The symbol
prescribed by maintenance standards in
designations for the various maintenance levels are as
technical publications for each item of
equipment. Overhaul normally does not return
an item to like new, zero mileage, or zero hour
Operator or crew
The highest degree of materiel
Direct support maintenance
maintenance. It consists of restoring equipment
General support maintenance
as nearly as possible to new condition in
The maintenance functions are defined as follows:
standards. Rebuild is performed only when
required by operational considerations or other
paramount factors and then only at the depot
A Inspect. To determine serviceability of an item
maintenance level. Rebuild reduces to zero the
by comparing its physical, mechanical, and
hours of miles the equipment, or component
electrical characteristics with established
thereof, has been in use.
d. Tools and Equipment.
B Test. To verify serviceability and to detect
column not applicable.
electrical or mechanical failure by use of test
e. Remarks, Column (5).
This column not
C Service. To clean, to preserve, to charge, and