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SECTION.
IJ
THE PIPER AZTEC ''D"
system reliability, an auxiliary voltage regulator and overvoltage
relay has been installed. Each set of .regulators and relays is
controlled by a switch located on the left sub-panel next to the
master switch. The switch is placarded "Voltage Regulator
Selector", "Main", and "Auxiliary". The switch should normally
be in the "Main" position. The operation of the alternators may
be checked by an ammeter switch located directly under the am-
meter.
If
the battery is completely discharged, charge it before
take-off as three volts are needed to excite the alternator.
Electrical switches for the various systems are located on
both
sub~panels
of. the instrument panel. The circuit breakers are
on
the.
right side sub-panel. To reset the circuit breakers simply
push in the reset button. Reduce the electrical load to minimum
and allow two minutes before resetting the breakers. Corrective
action should be taken in event of continual circuit breaker
popping. The alternator circuit breakers, ·mounted on the same
panel, are of the switch type and should not be turned off while
the engines are running.
.
Instrument lighting is provided by two spotlights installed in
the center of the cabin ceiling. These lights are operated by a
rheostat switch which is located directly aft of the lights. The
lights are turned on with the first movement of the rheostat knob
and the light intensity increased by further rotation of the con-
trol. Provided as optional equipment are individual post lamps
mounted on the panel adjacent to each instrument. These lights
are controlled by a
r.
h eostat switch located on the panel with the
other electrical switches. Operation of the rheostat is the same
as for the spotlights.
·
Located in the cabin ceiling just aft of the
windshield, on both the right and left sides, are two map lights
equipped with clear lenses. Each light is operated by the switch
located adjacent to the unit. For the passengers, reading lights
are installed over each seat as well as a cabin dome light lo-
cated in the center of the cabin ceiling. A separate switch is
used for each of these units.
There are overhead lights in both the forward and aft baggage
compartments. They will turn on and off with the opening and
closing of the baggage doors. On the upper right side of the
21
680501
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