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SECTION 7
DESCRIOPERATION
PIPER AIRCRAFT CORPORATION
PA-28R-201, ARROW
7.23 INSTRUMENT PANEL (continued)
The instrument panel is designed to accommodate the customary
advanced flight instruments and the normally required power plant (
instruments. The altitude and directional gyros, located in the center of the
left hand instrument panel, are vacuum operated. The vacuum gauge is
located on the right hand instrument panel. The turn indicator, on the left
side, is electrically operated. The optional Horizontal Situation Indicator
(HSI), when installed in place of the directional gyro, is also electrically
operated.
The radios are located in the center section of the panel, and the circuit
breakers are in the lower right corner of the panel.
An annunciator panel is mounted in the upper instrument panel to warn
the pilot of a possible malfunction in the alternator, oil pressure, or vacuum
systems.
If
installed, the optional radio master (RADIO MASTR) switch is
located on the bottom row of the main switch panel. When the battery
master (BATT MASTR) switch is turned ON, power is supplied to the
avionics master relay switch, opening the contactors, and preventing current (
flow to the radios. When the radio master (RADIO MASTR) switch is
turned ON, power is removed from the avionics master relay, allowing the
contactors to spring closed, permitting current flow to the radios.
A ground clearance energy saver system is available to provide direct
power to the number one communications (COMM 1) transceiver without
turning on the battery master (BATT MASTR) switch and, if equipped, the
radio master (RADIO MASTR) switch. An internally lit ground clearance
(GND CLC) rocker switch, located on the instrument panel, provides
annunciation for engagement of the system. When the switch is ON, direct
airplane battery power is applied to the number one communications
(COMM
1)
transceiver audio amplifier (speaker) and radio accessories.
During periods when the engine is shutdown, and communications is not
required, the ground clearance (GND CLC) switch must be turned OFF to
prevent depletion of the battery.
REPORT: VB-1365
7-22
ISSUED: SEPTEMBER 15, 1988
(
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