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TM 5-4130-234-13&P
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1. General
paring those characteristics with prescribed standards.
a. This section provides a general explanation of all
c. Service. Operations required periodically to keep
maintenance and repair functions authorized at various
an item in proper operating condition, i.e., to clean, to
maintenance levels.
preserve, to drain, to paint, or to replenish fuel,
b. Section II designates overall responsibility for the
lubricants, hydraulic fluids, or compressed air supplies.
performance of maintenance functions on the identified
d. Adjust. To maintain within prescribed limits, by
end item or component and the work measurement time
bringing into proper or exact position, or by setting the
required to perform the functions by the designated
operating characteristics to specified parameters.
maintenance  level.  The  implementation  of  the
e. Align. To adjust specified variable elements of an
maintenance functions upon the end item or component
item to bring about optimum or desired performance.
will be consistent with the assigned maintenance
f. Calibrate. To determine and cause corrections to
functions.
he made or to be adjusted on instruments or test
B-2. Explanation of Columns in Section II
measuring and diagnostic equipments used in precision
a. Column 1. Group Number. A number is assigned
measurement.  Consists  of  comparisons  of  two
to each group in a top down breakdown sequence. The
instruments, one of which is a certified standard of
applicable groups are listed on the MAC in disassembly
known accuracy, to detect and adjust any discrepancy in
sequence beginning with the first group removed.
the accuracy of the instrument being compared.
b. Column 2. Functional Group. This column
g. Install. The act of emplacing, seating, or fixing
contains a brief description of the components of each
into position an item, part, or module (component or
numerical group.
assembly) in a manner to allow the proper functioning of
c. Column 3. Maintenance Functions. This column
an equipment or system.
lists the various maintenance functions (A through K).
h. Replace. The act of substituting a serviceable like
The lowest maintenance level authorized to perform
type part. subassembly, or module (component or
these functions is indicated by a symbol in the
assembly) for an unserviceable counterpart.
appropriate column. Work measurement time standards
i. Repair. The application of maintenance services
(the active repair time required to perform the
(in specs, test, service, adjust, align, calibrate, or
maintenance function) are shown directly below the
replace) or other maintenance actions (welding, grinding
symbol identifying the maintenance level. The symbol
riveting,
straightening,
facing.
remachining
or
designations for the various maintenance levels are as
resurfacing) to restore serviceability to an item by
follows:
correcting specific damage fault, malfunction. or failure
C-Operator or crew
in a part subassembly module (component or assembly)
O-Organization maintenance
end item. or system.
F-Direct support maintenance
j. Overhaul. That maintenance effort (service/action)
H-General support maintenance
necessary  to  restore  an  item  to  a  completely
D-Depot maintenance
serviceable/operational  condition  as  prescribed  by
The maintenance functions are defined as follows:
maintenance standards (i.e., DMWR) in appropriate
a. Inspect. To determine serviceability of an item by
technical publication. Overhaul is normally the highest
comparing its physical, mechanical, and electrical
degree of
characteristics  with  established  standards  through
examination.
b. Test. To verify serviceability and detect incipient
failure by measuring the mechanical or electrical
characteristics
of
an
item
and
com
B-1

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