APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1. General
cipient failure by measuring the mechanical or electrical
characteristics of an item and comparing those
a. This section provides a general explanation
characteristics with prescribed standards.
of all maintenance and repair functions authorized at
C - SERVICE. Operations required periodically
various maintenance levels.
to keep an item in proper operating condition, i.e., to
b. Section II designates overall responsibility for
clean, to preserve, to drain, to paint, or to replenish fuel,
the performance of maintenance functions on the
lubricants, hydraulic fluids, or compressed air supplies.
identified end item or component and the work
D - ADJUST. To maintain within prescribed
measurement time required to perform the functions by
limits, by bringing into proper or exact position, or by
the designated maintenance level. The implementation
setting the operating characteristics to specified
of the maintenance functions upon the end item or
parameters.
component will be consistent with the assigned
E - ALINE. To adjust specified variable
maintenance functions.
elements of an item to bring about optimum or desired
c. Section III lists the special tools and test
performance.
equipment required for each maintenance function as
F - CALIBRATE. To determine and cause
referenced from Section II (Not Applicable).
corrections to be made or to be adjusted on instruments
d. Section IV contains supplemental instructions
or test measuring and diagnostic equipments used in
or explanatory notes for a particular maintenance
precision measurement. Consists of comparisons of two
function (Not Applicable).
instruments, one of which is a certified standard of
known accuracy, to detect and adjust any discrepancy in
B-2. Explanation of Columns in Section II
the accuracy of the instrument being compared.
G - INSTALL. The act of emplacing, seating, or
a. Column (1), Group Number. A number is
fixing into position an item, part, or module (component
assigned to each group in a top down breakdown
or assembly) in a manner to allow the proper functioning
sequence. The applicable groups are listed on the MAC
of an equipment or system.
in disassembly sequence beginning with the first group
H - REPLACE. The act of substituting a
removed.
serviceable like type part, subassembly, or module
b. Column (2), Assembly Group. This column
(component or assembly) for an unserviceable
contains a brief description of the components of each
counterpart.
numerical group.
I - REPAIR. The application of maintenance
c. Column (3), Maintenance Functions. This
services (inspect, test, service, adjust, aline, calibrate,
column lists the various maintenance functions (A
or replace) or other maintenance actions (welding,
through K). The lowest maintenance level authorized to
grinding, riveting, straightening, facing, remachining or
perform these functions is indicated by a symbol in the
resurfacing) to restore serviceability to an item by
appropriate column. Work measurement time standards
correcting specific damage, fault, malfunction, or failure
(the active repair time required to perform the
in a part, subassembly, module (component or
maintenance function) as shown directly below the
assembly), end item, or system.
symbol identifying the maintenance level. The symbol
J - OVERHAUL. That maintenance effort
designations for the various maintenance levels are as
(service/action) necessary to restore an item to a
follows:
completely
serviceable/operational
condition
as
C - Operator or crew
prescribed by maintenance standards (i.e., DMWR) in
0 - Organizational maintenance
appropriate technical publication. Overhaul is normally
F - Direct support maintenance
the highest degree of maintenance performed by the
H - General support maintenance
Army. Overhaul does not normally return an item to like
D - Depot maintenance
new condition.
The maintenance functions are defined as follows:
K - REBUILD. Consists of those services/actions
A - INSPECT. To determine serviceability of an
necessary for the restoration of unserviceable
item by comparing its physical, mechanical, and
equipment to a like new condition in accordance with
electrical characteristics with established standards
through examination.
B - TEST. To verify serviceability and detect in-
B-1
