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Cirrus Design Section 7
SR22 Airplane Description
distribution buses. Loads on the Non-Essential Equipment Bus are
shed by pulling the individual circuit breakers.
Ground Service Receptacle
A ground service receptacle is located just aft of the cowl on the left
side of the airplane. This receptacle is installed to permit the use of an
external power source for cold weather starting and maintenance
procedures requiring reliable power for an extended period. The
external power source must be regulated to 28 VDC. The external
power control contactor is wired through the BAT 1 MASTER switch so
that the BAT 1 switch must be 'on' to apply external power.
Refer to Section 8, Ground Handling, Servicing, and Maintenance, for
use of external power and special precautions to be followed.
Convenience Outlet
A 12-volt convenience outlet is installed in the center console. The
receptacle accepts a standard cigarette-lighter plug. The outlet may be
used to power portable entertainment equipment such as CD players,
cassette players, and portable radios. Amperage draw through the
outlet must not exceed 3.5 amps. Power for the convenience outlet is
supplied through the 5-amp 12VDC OUTLET circuit breaker on the
Non-Essential Bus.
June 2007
7-74 Information Manual
Section 7 Cirrus Design
Airplane Description SR22
Exterior Lighting
The airplane is equipped with standard wing tip navigation lights with
integral anti-collision strobe lights. The separately controlled landing
light is located in the lower cowl.
Navigation Lights
The airplane is equipped with standard wing tip navigation lights. The
lights are controlled through the NAV light switch on the instrument
panel bolster. 28 VDC for navigation light operation is supplied through
the 5-amp NAV LIGHTS circuit breaker on Non-Essential Bus.
Strobe Light
Anti-collision strobe lights are installed integral with the standard
navigation lights. Each strobe is flashed by a separate power supply.
The strobe power supplies are controlled through the STROBE light
switch on the instrument panel bolster. 28 VDC for strobe light and
control circuits is supplied through the 5-amp STROBE LIGHTS circuit
breaker on Non-Essential Bus.
Landing Light
A High Intensity Discharge (HID) landing light is mounted in the lower
engine cowl. The landing light is controlled through the LAND light
switch on the instrument panel bolster.
Setting the LAND light switch 'ON' energizes the landing light control
relay in the Master Control Unit (MCU) completing a 28 VDC circuit
from the airplane Main Distribution Bus to the light's ballast located on
the firewall. The ballast provides boosted voltage to illuminate the HID
lamp. A 15-amp breaker on the Main Distribution Bus in the MCU
protects the circuit.
Interior Lighting
Interior lighting for the airplane consists of separately controlled
incandescent overhead lights for general cabin lighting, individual
lights for the pilots and passengers, and dimmable panel floodlights.
The flight instrumentation and avionics equipment lights are dimmable.
June 2007
Information Manual 7-75
Cirrus Design Section 7
SR22 Airplane Description
Instrument Lights
Instrument lighting for the airplane consists of dimmable incandescent
lights in the instrument bezels. The lights are controlled through the
INST lights control on the instrument panel bolster. Rotating the knob
clockwise energizes the lights and increases brightness. The
instrument light circuits operate on 28 VDC supplied through the 2-
amp INST LIGHTS circuit breaker on Main Bus 1.
Panel Flood Lights
A string of red LEDs mounted under the instrument panel glareshield
provide flood lighting for the instrument panel. The lights are controlled
through the PANEL lights control on the instrument panel bolster.
Rotating the knob clockwise energizes the lights and increases
brightness. The panel lights operate on 28 VDC supplied through the
3-amp CABIN LIGHTS circuit breaker on Main Bus 2.
Reading Lights
Individual eyeball-type reading lights are installed in the headliner
above each passenger position. Each light is aimed by positioning the
lens in the socket and is controlled by a push-button switch located
next to the light. The pilot and copilot reading lights are also dimmable
through the PANEL lights control on the instrument panel bolster. The
lights are powered by 28 VDC supplied through the 3-amp CABIN
LIGHTS circuit breaker on Main Bus 2.
Overhead Dome Light
General cabin lighting is provided by a dome light located in the
headliner at the approximate center of the cabin. The dome light is
　
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