APPENDIX B. MAINTENANCE ALLOCATION CHART

APPENDIX B

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

B-1. General.

equipment to a like-new condition in accordance with

a. This section provides a general explanation of

original manufacturing standards. Rebuild is the highest

degree of materiel maintenance applied to Army

all maintenance and repair functions authorized at

equipment. The rebuild operation includes the act of

various maintenance levels.

b. Section II designates overall responsibility for

returning to zero those age measurements (hours,

miles,

etc.)

considered

classifying

Army

the performance of maintenance functions on the

equipment/components.

identified end item or component. The implementation

h. Repair.

The application of maintenance

of the maintenance functions upon the identified end

services (inspect, test, service, adjust, align, calibrate,

item or component will be consistent with the assigned

replace) or other maintenance actions (welding,

maintenance functions.

grinding, riveting, straightening, facing, remachining, or

B-2. Maintenance Functions

resurfacing) to restore serviceability to an item by

correcting specific damage, fault, malfunction, or failure

Maintenance functions are defined as follows:

a. Adjust. Maintain within prescribed limits by

in a part, subassembly, module/component/assembly,

end item, or system.

bringing into proper or exact position, or by setting the

i. Replace. The act of substituting a serviceable

operating characteristics to the specified parameters.

b. Align. To adjust specified variable elements of

like-type part, subassembly, module (component or

assembly) in a manner to allow the proper functioning of

an item to bring about optimum or desired performance.

c. Calibrate. To determine and cause corrections

an equipment/system.

j. Service. Operations required periodically to

to be made or to be adjusted on instruments or test

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

measuring and diagnostic equipment used in precision

preserve,

drain,

paint,

replenish

measurement.

Consists of comparisons of two

fuel/lubricants/hydraulic fluids or compressed air

instruments, one of which is a certified standard of

supplies.

known accuracy, to detect and adjust any discrepancy in

k. Test. To verify serviceability and to detect

the accuracy of the instrument being compared.

d. Inspect. To determine the serviceability of an

incipient failure by measuring the mechanical or

electrical characteristics of an item and comparing those

item by comparing its physical, mechanical, and/or

characteristics with prescribed standards.

electrical characteristics with established standards

l. Symbols. The uppercase letter placed in the

through examination.

e. Install. The act of emplacing, seating, or fixing

appropriate column indicates the lowest level at which

that particular maintenance function is to be performed.

into position an item, part, module (component or

assembly) in a manner to allow the proper functioning of

B-3. Explanation of Format

the equipment/system.

f. Overhaul.

Purpose and use of the format are as follows, and shall

That

maintenance

effort

be explained in the introductory portion of the MAC.

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

a. Column (1), Group number. Column 1 lists

completely

serviceable/operational

condition

group numbers, the purpose of which is to match

prescribed by maintenance standards (e.g., DMWR) in

components, assemblies, subassemblies and modules

pertinent technical publications. Overhaul is normally

with the next higher assembly.

the highest degree of maintenance performed by the

b. Column (2), Functional group. Column 2 lists

Army. Overhaul does not normally return an item to

the next higher assembly group and the item names of

like-new condition.

g. Rebuild. Consists of those services/actions

components, assemblies, subassemblies and modules

within the group for which maintenance is authorized.

necessary for the restoration of unserviceable

B-1