APPENDIX D. MAINTENANCE ALLOCATION - TM-11-4920-296-14-P0127

TM 11-4920-296-14&P

APPENDIX D

MAINTENANCE ALLOCATION

Section I. INTRODUCTION

nent or assembly) in a manner to allow the proper

D-1. General

functioning of the equipment or system.

This appendix provides a summary of the mainte-

h. Replace. The act of substituting a serviceable

nance operations for AN/APM378. It authorizes

like type part, subassembly, or module (compo-

categories of maintenance for specific mainte-

nent or assembly) for an unserviceable counter-

nance functions on repairable items and compo-

part.

nents and the tools and equipment required to per-

i. Repair. The application of maintenance serv-

form each function. This appendix may be used as

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

an aid in planning maintenance operations.

replace ) or other maintenance actions (welding,

grinding, riveting, straightening, facing, rema-

D-2. Maintenance Function

chining, or resurfacing) to restore serviceability

Maintenance functions will be limited to and de-

to an item by correcting specific damage, fault,

fined as follows:

malfunction or failure in a part, subassembly,

a. Inspect. To determine the serviceability of an

module (component or assembly), end item, or

it-em by comparing its physical, mechanical, and/

system.

or electrical characteristics with established

j. Overhaul. That maintenance effort (service/

standards through examination.

action ) necessary to restore an item to a com-

b. Test. To verify serviceability and to detect

pletely serviceable/operational condition as pre-

incipient failure by measuring the mechanical or

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

electrical characteristics of an item and compar-

in appropriate technical publications. Overhaul is

ing those characteristics with prescribed stand-

normally the highest degree of maintenance per-

ards.

formed by the Army. Overhaul does not normally

c. Service. Operations required periodically to

return an item to like new condition.

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

k. Rebuild. Consists of those services/actions

clean (decontaminate), to preserve to drain, to

necessary for the restoration of unserviceable

paint, or to replenish fuel, lubricants, hydraulic

equipment to a like new condition in accordance

fluids, or compressed air supplies.

with original manufacturing standards. Rebuild

d. Adjust. To maintain, within prescribed lim-

is the highest degree of materiel maintenance ap-

its, by bringing into proper or exact position, or

plied to Army equipment. The rebuild operation

by setting the operating characteristics to the

includes the act of returning to zero those age

specified parameters.

measurements (hours, miles, etc. ) considered in

e. Align. To adjust specified variable elements

classifying Army equipment/components.

of an item to bring about optimum or desired per-

formance.

D-3. Column Entries

f. Calibrate. To determine and cause correc-

a. Column 1, Group Number. Column 1 lists

tions to be made or to be adjusted on instruments

group numbers, the purpose of which is to iden-

or test. measuring and diagnostic equipments used

tify components, assemblies, subassemblies, and

in precision measurement. Consists of compari-

modules with the next higher assembly,

sons of two instruments, one of which is a certi-

b. Column 2, Component/Assembly. Column 2

fied standard of known accuracy, to detect and ad-

contains the noun names of components, assem-

just any discrepancy in the accuracy of the instru-

blies, subassemblies, and modules for which main-

ment being compared.

tenance is authorized.

g. Install. The act of emplacing, seating, or fix-

c. Column 3, Maintenance Functions. Column 3

ing into position an item, part, module (compo-

D-1