APPENDIX C
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
E-Aline: To adjust specified variable elements of an
C-1. General
item to bring to optimum performance.
a. This section provides a general explanation of all
F-Calibrate: To determine the corrections to be made
maintenance and repair functions authorized at various
in the readings of instruments or test equipment used in
maintenance levels.
precise measurement. Consists of the comparison of two
instruments, one of which is a certified standard of known
performance of maintenance functions on the identified
accuracy, to detect and adjust any discrepancy in the
end item or component. The implementation of the
accuracy of the instrument being compared with the
maintenance functions upon the end item or component
certified standard.
will be consistent with the assigned maintenance
G-Install: To set up for use in an operational
functions
environment such as an emplacement, site, or vehicle.
c. Section III. (Not applicable).
H-Replace: To replace unserviceable items with
d. Section IV. (Not applicable).
serviceable like items.
C-2. Explanation of Columns in Section II
I-Repair: Those maintenance operations necessary to
a. Group Number, Column (1). The assembly group
restore an item to serviceable condition through
is a numerical group assigned to each assembly in a top-
correction of material damage or a specific failure.
down breakdown sequence. The applicable assembly
Repair may be accomplished at each category of
groups are listed on the MAC in disassembly sequence
maintenance.
beginning with the first assembly removed in a top-down
J-Overhaul:
Normally, the highest degree of
disassembly sequence.
maintenance performed by the Army in order to minimize
b. Functional Group, Column (2). This column
time work in process is consistent with quality and
contains a brief description of the components of each
economy of operation. It consists of that maintenance
assembly group..
necessary to restore an item to completely serviceable
c. Maintenance Functions, Column (3). This column
condition as prescribed by maintenance standards in
lists the various maintenance functions (A through K) and
technical publications for each item of equipment.
indicates the lowest maintenance category authorized to
Overhaul non. ally does not return an item to like new,
perform these functions. The symbol designations for the
zero mileage, or zero hour condition.
various maintenance categories are as follows:
K-Rebuild:
The highest degree of material
C-Operator or crew
maintenance. It consists or restoring equipment as nearly
O-Organizational maintenance
as possible to new condition in accordance with original
F-Direct .support maintenance
manufacturing standards. Rebuild is performed only
H-General support maintenance
when required by operational considerations or other
The maintenance functions are defined as follows:
paramount factors and then only at the depot
A-Inspect: To determine serviceability of an item by
maintenance category. Rebuild reduces to zero the hours
comparing its physical, mechanical, and electrical
or miles the equipment, or component thereof, has been
characteristics with established standards.
in use.
B-Test:
To verify serviceability and to detect
d. Tools and Equipment, Column (4). This column is
electrical or mechanical failure by use of test equipment.
provided for referencing by code the special tools and test
C-Service: To clean, to preserve, to charge, and to
equipment.
(section III) required to perform the
add fuel, lubricants, cooling agents, and air. If it is
maintenance functions (sec II).
desired that elements, such as painting and lubricating, be
e. Remarks, Column (5). This column is provided
defined separately, they may be so listed.
for referencing by code the remarks (sec IV) pertinent to
D-Adjust: To rectify to the extent necessary to bring
the maintenance functions.
into proper operating range.
C-1
