Section I. INTRODUCTION
B - 1 . General.
i. Repair. The application of maintenance servica
(inspect, test, service, adjust, align, calibrate, replace
This appendix provides a summary of the maintenance
or other maintenance actions (welding, grinding, rivet
operations for PP-3940A/G. It authorizes categories
ing, straightening, facing, remachining, or resurfac-
of maintenance for specific maintenance functions on
ing) to restore serviceability to an item by correcting
repairable items and components and the tools and
specific damage, fault, malfunction, or failure in a
equipment required to perform each function. This ap-
part, subassembly, module (component or assembly)
pendix maybe used as an aid in planning maintenance
end item, or system. This function does not include the
trial and error replacement of running spare type
B-2. Maintenance Function.
items such as fuses, lamps, or electron tubes.
j. Overhaul. That maintenance effort (service/ac-
Maintenance functions will be limited to and defined
tion) necessary to restore an item to a completely serv-
iceable/operational condition as prescribed by mainte-
a. Inspect. To determine the serviceability of an
nance standards (i.e., DMWR) in appropriate technical
tern by comparing its physical, mechanical, and/or
publications. Overhaul is normally the highest degree
electrical characteristic with established standards
of maintenance performed by the Army. Overhaul
does not normally return an item to like new condi-
b. Test. To verify serviceability and to detect incipi-
ent failure by measuring the mechanical or electrical
k. Rebuild. Consists of those services/actions neces-
characteristics of an item and comparing those charac-
teristics with prescribed standards.
a like new condition in accordance with original manu-
c. Service. Operations required periodically to keep
facturing standards. Rebuild is the highest degree of
an item in proper operating condition, i.e., to clean (de-
materiel maintenance applied to Army equipment.
`contaminate), to preserve, to drain, to paint, or to re-
The rebuild operation includes the act of returning tc
plenish fuel, lubricants, hydraulic fluids, or com-
zero those age measurement (hours, miles, etc.) con-
pressed air supplies.
sidered in classifying Army equipments/components.
d. Adjust. To maintain, within prescribed limits, by
bringing into proper or exact position, or by setting
B-3. Column Entries.
he operating characteristics to the specified parame-
a. Column 1, Group Number. Column 1 lists group
numbers, the purpose of which is to identify compo-
e. Align. To adjust specified variable elements of an
nents, assemblies, subassemblies, and modules with
tern to bring about optimum or desired performance.
the next higher assembly.
f. Calibrate. To determine and cause corrections to
be made or to be adjusted on instruments or test meas-
b. Column 2, Component/Assembly. Column 2 con-
ring and diagnostic equipments used in precision
tains the noun names of components, assemblies, sub
measurement. Consists of comparisons of two instru-
assemblies, and modules for which maintenance is au-
ments, one of which is a certified standard of known
accuracy, to detect and adjust any discrepancy in the
c. Column 3, Maintenance Functions. Column 3 lists
accuracy of the instruments being compared.
the functions to be performed on the item listed in col-
g. Install. The act of emplacing, seating, or fixing
umn 2. When items are listed without maintenance
into position an item, part, module (component or as-
functions, it is solely for purpose of having the group
embly) in a manner to allow the proper functioning of
numbers in the MAC and RPSTL coincide.
he equipment or system.
d. Column 4, Maintenance Category. Column 4
h. Replace, The act of substituting a serviceable like
specifies, by the listing of a "worktime" figure in the
appropriate subcolumn(s), the lowest level of mainte-
type part, subassembly, or module (component or as-
nance authorized to perform the function listed in col-
embly) for an unserviceable counterpart.