Appendix B: MAINTENANCE ALLOCATION CHART

TM 5-4120-352-14

APPENDIX

MAINTENANCE ALLOCATION CHART

Section I.

limits, by bringing into proper or exact position, or

General

by setting the operating characteristics to specified

a. This section provides a general explanation of

parameters.

all maintenance and repair functions authorized at

(5) Align. To adjust specified variable ele-

various maintenance levels.

ments of an item to bring about optimum or desired

b. Section II designates overall responsibility for

performance.

the performance of maintenance functions on the

(6) Calibrate. To determine and cause cor-

identified end item or component and the work mea-

rections to be made or to be adjusted on instruments

surement time required to perform the functions by

or test measuring and diagnostic equipments used

the designated maintenance level. The imple-

in precision measurement. Consists of comparison

mentation of the maintenance functions upon the

of two instruments, one of which is a certified stan-

end item or component will be consistent with the

dard of known accuracy, to detect and adjust any

assigned maintenance functions.

discrepancy in the accuracy of the instrument being

c. Section III lists the tools and test equipment

compared.

required for each maintenance function as refer-

(7) Install. The act of emplacing, seating, or

enced from Section II.

fixing into position an item, part or module (com-

ponent or assembly) in a manner to allow the proper

E x p l a n a t i o n of Columns in Sec-

functioning of an equipment or system.

tion II

(8) Replace. The act of substituting a ser-

a. Column 1, Group Number. Column 1 lists

viceable like type part, subassembly, or module

group number to identify related components, as-

(component or assembly) for an unserviceable coun-

semblies, subassemblies, and modules with their

terpart.

next higher assembly. The applicable groups are

(9) Repair. The application of maintenance

listed in the MAC in disassembly sequence begin-

services (inspect, test, service, adjust, align, cali-

ning with the first group removed.

brate, or replace) or other maintenance actions

b. Column 2, Component/Assembly. This col-

(welding, grinding, riveting, straightening, facing,

umn contains the noun names of components, as-

remachining or resurfacing) to restore ser-

semblies, subassemblies and modules for which

viceability to an item by correcting specific damage,

maintenance is authoriaed.

fault, malfunction, or failure in a part, subassem-

c. Column 3, Maintenance Functions. This

bly, module (component or assembly), end item, or

column lists the functions to be performed on the

system.

item listed in Column 2. The maintenance functions

(10) Overhaul. That maintenance effort

are defined as follows:

(service/action) necessary to restore an item to a

(1) Inspect. To determine serviceability of an

completely serviceable/operational condition as pre-

item by comparing its physical, mechanical and/or

scribed by maintenance standards (i.e., DMWR) in

electrical characteristics with established stan-

appropriate technical publications. Overhaul is nor-

dards through examination.

mally the highest degree of maintenance performed

(2) Test. To verify serviceability and detect

by the Army. Overhaul does not normally return an

incipient failure by measuring the mechanical or

item to a like new condition.

electrical characteristics of an item and comparing

(11) Rebuild. Consists of those services/ac-

those characteristics with prescribed standards.

tions necessary for the restoration of unserviceable

(3) Service. Operations required periodically

equipment to a like new condition in accordance

to keep an item in proper operating condition, i.e., to

with original manufacturing standards. Rebuild is

clean (decontaminate), to preserve, to drain, to

the highest degree of materiel maintenance applied

paint, or to replenish fuel, lubricants, hydraulic flu-

to Army equipment. The rebuild operation includes

ids, or compressed air supplies.

the act of returning to zero those age measurements

(4) Adjust. To maintain within prescribed

(hours/miles, etc.) considered in classifying Army

B-1