APPENDIX B - TM-11-6665-209-200021

TM 11-6665-209-20

APPENDIX B

Section l.

This appendix provides a summary of the maintenance operations for the AN/PDR-27(#).

I t authorizes categories of maintenance for specific maintenance functions on

repairable items and components and the tools and equipment required to perform each

function. This appendix may be used as an aid in planning maintenance operations.

Maintenance functions will be limited to and defined as follows:

a. INS PECT - To determine the serviceability of an item by comparing its physical,

mechanical, and/or electrical characteristics with established standards through ex-

amination.

b. T E S T - To verify serviceability and to detect incipient failure by measuring the

mechanical or electrical characteristics of an item and comparing those characteristics

with prescribed standards.

c. SERVICE - Operations required periodically to keep an item in proper operating con-

dition, i.e., to clean (decontaminate), to preserve, to drain, to paint, or to replenish fuel,

lubricants, hydraulic fluids, or compressed air supplies.

d. ADJUST - To maintain, within prescribed limits, by bringing into proper or exact posi-

tion, or by setting the operating characteristics to the specified parameters.

e. ALIGN - To adjust specified variable elements of an item to bring about optimum or

desired performance.

f. CAL IBRATE -To determine and cause corrections to be made or to be adjusted on in-

struments or test measuring and diagnostic equipments used in precision measure-

ment. Consists of comparisons of two instruments, one of which is a certified standard

of known accuracy, to detect and adjust any discrepancy in the accuracy of the instru-

ment being compared.

g. INSTALL - The act of emplacing, seating, or fixing into position an item, part, module

(component or assembly) in a manner to allow the proper functioning of the equipment

or system.

h. R E P L A C E - The act of substituting a serviceable like type part, sub-assembly, or

module (component or assembly) for an unserviceable counterpart.

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