This appendix provides a summary of the maintenance operations for the multiplexer. It
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. Inspect. To determine the serviceability of an item by comparing its physical, mechanical,
and/or electrical characteristics with established standards through examination.
b. Test. To verify serviceability and to detect incipient failure by measuring the mechanical or
electrical characteristics of an item and comparing those characteristics with prescribed
c. Semite. Operations required periodically to keep an item in proper operating condition, 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 position, 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
f. Calibrate. To determine and cause corrections to be made or to be adjusted on instruments
or test measuring and diagnostic equipments used in precision measurement. Consists of
comparisons of two instruments, one of which is certified standard of known accuracy, to detect
and adjust any discrepancy in the accuracy of the instrument 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
h. Replace. The act of substituting a serviceable like type part, subassembly, or module
(component or assembly) for an unserviceable counterpart.