Section I. INTRODUCTION
ancy in the accuracy of the instrument being
This appendix provides a summary of the
g. Install. The act of emplacing, seating, or
maintenance operations for AT784/PRC. It
fixing into position an item, part, module
authorizes categories of maintenance for
(component or assembly) in a manner to allow
specific maintenance functions on repairable
the proper functioning of the equipment or
items and components and the tools and
equipment required to perform each function.
h. Replace. The act of substituting a serv-
This appendix may be used as an aid in plan-
iceable like type part, subassembly, or
ning maintenance operations.
module (component or assembly) for an un-
C2. Maintenance Function
i. Repair. The application of maintenance
Maintenance functions will be limited to and
services (inspect, test, service, adjust, align,
defined as follows:
calibrate, replace) or other maintenance ac-
a. Inspect. To determine the serviceability
tions (welding, grinding, riveting, straighten-
of an item by comparing its physical, mechan-
ing, facing, remachining, or resurfacing) to
ical, and/or electrical characteristics with es-
restore serviceability to an item by correcting
tablished standards through examination.
specific damage, fault, malfunction, or failure
b. Test. To verify serviceability and to de-
in a part, subassembly, module (component or
t e c t incipient failure by measuring the
assembly), end item, or system.
mechanical or electrical characteristics of an
j. Overhaul. That maintenance effort
item and comparing those characteristics
(service/action) necessary to restore an item
with prescribed standards.
to a completely serviceable/operational condi-
c. Service. Operations required periodically
tion as prescribed by maintenance standards
to keep an item in proper operating condition,
(i.e., DMWR) in appropriate technical publica-
i.e., to clean (decontaminate), to preserve, to
tions. Overhaul is normally the highest de-
drain, to paint, or to replenish fuel, lubri-
gree of maintenance performed by the Army.
cants, hydraulic fluids, or compressed air
Overhaul does not normally return an item to
like new condition.
d. Adjust. To maintain, within prescribed
k. Rebuild. Consists of those services/
limits, by bringing into proper or exact posi-
tion, or by setting the operating characteris-
serviceable equipment to a like new condition
tics to the specified parameters.
in accordance with original manufacturing
e. Align. To adjust specified elements of an
standards. Rebuild is the highest degree of
item to bring about optimum or desired per-
m a t e r i e l maintenance applied to Army
equipment. The rebuild operation includes
f. Calibrate. To determine and cause cor-
the act of returning to zero those age meas-
rections to be made or to be adjusted on in-
urements (hours, miles, etc. ) considered in
struments or test measuring and diagnostic
classifying Army equipments/components.
equipment used in precision measurement.
Consists of comparisons of two instruments,
C3. Column Entries
one of which is a certified standard of known
accuracy, to detect and adjust any discrep-
a. Column 1, Group Number. Column 1 lists