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TM-11-5805-387-20-2 Modem Radion Teletypewriter MD-522A/RC (NSN
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COLUMN ENTRIES
TM 11-5805-387-20-2
MAINTENANCE ALLOCATION
Section I. INTRODUCTION
B-1. GENERAL
This appendix provides a summary of maintenance operations for MD-522A/GRC. It authorizes
categories of maintenance for specific maintenance functions on repairable items and com-
ponents, as well as tools and equipment needed to perform each function. Use this appendix as
an aid in planning maintenance operations.
B-2. MAINTENANCE FUNCTION
Maintenance functions will be limited to and defined as foliows:
a. INSPECT. To visually examine an item and compare its physical, mechanical and/or electrical
characteristics with established standards in order to determine its serviceability.
b. TEST. To measure mechanical or electrical characteristics of an item and compare those
characteristics with prescribed standards in order to verify serviceability.
c. SERVICE. Procedures required periodically to keep an item in proper operating condition,
e.g., to clean (decontaminate), preserve, drain, paint, or to fill up fuel, lubrication, hydraulic
fluid, or compressed air supplies.
d. ADJUST. To set operating characteristics to the specified parameters and keep them within
their prescribed limits.
e. ALIGN. To adjust specified variable elements of an item to bring about the best or desired
performance.
f. CALIBRATE. To correct test measuring and diagnostic equipment used in precision
measurements. Must compare two instruments, one of which is a certified standard of
known accuracy, to detect and adjust any differences in the accuracy of the instrument be-
ing compared.
g. INSTALL. To place, seat or fix into position an item, part or module (component or assembly)
to allow proper functioning of equipment or system.
h. REPLACE. To substitute a functioning like type part, subassembly or module (component or
assembly) for its unserviceable counterpart.
i. REPAIR. To correct specific damage, fault, malfunction or failure in a part, subassembly,
module (component or assembly), end item or system by applying maintenance services (a-f,
h above) or other maintenance actions (welding, grinding, riveting, straightening, facing,
remachining or resurfacing). This function does not include trial and error replacement of
such items as fuses, lamps or electron tubes.
j. OVERHAUL. The highest degree of maintenance applied to Army equipment. This function
does not normally return an item to "like new" condition but restores it to completely ser-
viceable/operational conditions according to maintenance standards (i.e., DMWR) in ap-
propriate technical publications.
k. REBUILD. The highest degree of materiel maintenance applied to Army equipment. To restore
unserviceable equipment to a "like new" condition according to original manufacturing stan-
dards. This function includes returning to zero those age measurements (hours, miles, etc.)
considered in classifying Army equipment/components.
B-1

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