MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1. General
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 an item to
all maintenance and repair functions authorized at
bring to optimum performance.
various maintenance levels.
F-Calibrate. To determine the corrections to be made in the
b. Section II, designates overall responsibility
readings of instruments or test equipment used in precise
for the performance of maintenance functions on
measurement. Consists of the comparison of two in-
struments, one of which is a certified standard of known
t h e identified end item or component. The im-
accuracy, to detect and adjust any discrepancy in the ac-
plementation of the maintenance functions upon
curacy of the instrument being compared with the certified
t h e identified end item or component will be
standard.
consistent with the assigned maintenance functions.
G-Install. To set up for use in an operational environment
c. Section III, lists the special tools and test
such as an emplacement, site, or vehicle.
H-Replace. To replace unserviceable items with serviceable
equipment required for each maintenance function
like items.
as referenced from Section II. (Not applicable).
I-Repair. Those maintenance operations necessary to restore
d. Section IV, c o n t a i n s s u p p l e m e n t a l i n -
an item to serviceable condition through correction of
s t r u c t i o n s or explanatory notes required for a
material damage or a specific failure. Repair may be
particular maintenance function.
accomplished at each level of maintenance.
J-Overhaul. Normally, the highest degree of maintenance
B-2. Explanation of Columns in Section II.
performed by the Army in order to minimize time work is in
a. Group Number, Column (1). The assembly
process consistent with quality and economy of operation. It
consists of that maintenance necessary to restore an item to
group number is a numerical group assigned to
completely serviceable condition as prescribed by main-
each assembly. The assembly groups are listed on
tenance standards in technical publications for each item of
the MAC in disassembly sequence beginning with
equipment. Overhaul normally does not return an item to
the first assembly removed in a top down
like new, zero mileage, or zero hour condition..
disassembly sequence.
K-Rebuild. The highest degree of material maintenance. It
consists of restoring equipment as nearly as possible to new
b. Assembly Group, Column (2). This column
condition in accordance with original manufacturing
contains a brief description of the components of
standards. Rebuild is performed only when required by
each assembly group.
operational considerations or other paramount factors and
c. Maintenance Functions, Column (3). T h i s
then only at the depot maintenance level. Rebuild reduces
column lists the various maintenance functions (A
to zero the hours or miles the equipment, or component
thereof. has been in use.
through K). The upper case letter placed in the
The maintenance functions are defined as follows:
appropriate column i n d i c a t e s the lowest main-
d. Tools and Equipment, Column (4). T h i s
tenance level authorized to perform these functions.
column not applicable.
The active repair time required to perform the
e. Remarks,
Column (5). This column is
maintenance function is included directly below the
provided for referencing by code the remarks (sec.
symbol identifying the category of maintenance.
IV) pertinent to the maintenance functions.
The symbol designations for the various main-
tenance levels are as follows:
B-3. Explanation of Columns in Section III.
C-Operator or crew
(Not applicable).
O-Organizational maintenarrce
B-4. Explanation of Columns in Section IV.
F-Direct support maintenance
H-General support maintenance
a. Reference Code. This column consists of two
D-DePot maintenance
letters separated by a dash (entered from column 5
of sec. II). The first letter references alpha
The maintenance functions are defined as follows:
s e q u e n c e in c o l u m n 5 a n d t h e s e c o n d l e t t e r
A-Inspect. To determine serviceability of an item by com-
paring its physical, mechanical, and electrical charac-
references a maintenance function, column 3, A
teristics with established standards.
through K.
B-Test. To verify serviceability and to detect electrical or
b. Remarks. T h i s c o l u m n l i s t s i n f o r m a t i o n
mechanical failure by use of test equipment.
pertinent to the maintenance function to be per-
C-Service. To clean, to preserve, to charge, and to add fuel,
formed (as indicated in sec. II).
lubricants, cooling agents, and air.
