Appendix B: MAINTENANCE ALLOCATION CHART

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

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

item

and

com

B-1