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switch is ON and the Pitot heater is not receiving electrical current.
Illumination of PITOT HT RQD Caution indicates the system detects
OAT is less than 41°F (5°C) and Pitot Heat Switch is not ON.
Illumination of PITOT HT OFF Caution indicates the system detects
OAT is greater than 41°F (5°C) and Pitot Heat Switch is OFF. A current
sensor on the Pitot heater power supply wire provides current sensing.
Alternate Static Source
An alternate static pressure source valve is installed on the switch and
control panel to the right of the pilot's leg. This valve supplies static
pressure from inside the cabin instead of the external static port. If
erroneous instrument readings are suspected due to water or ice in
the pressure line going to the standard external static pressure source,
the alternate static source valve should be turned on. Pressures within
the cabin will vary with open heater/vents. Whenever the alternate
static pressure source is selected, refer to Section 5 for airspeed
calibration and altitude corrections to be applied.
March 2010
Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-65
Figure 7-14
Pitot-Static System
STATIC
BUTTONS
PITOT HEAT
PFD Air Data
SR22_FM07_2794A
AIRSPEED
INDICATOR
PITOT MAST
Annunciation
PITOT-STATIC
WATER TRAPS
ALTERNATE
STATIC
AIR SOURCE
ALTIMETER
ENGINE AIRFRAME UNIT
LOGIC
CURRENT
SENSOR
HEATER
7.5A
PITOT
HEAT
CB
PITOT HEAT SW
AIR DATA COMPUTER
March 2010
7-66 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
Avionics
Perspective Integrated Avionics System
The Perspective Integrated Avionics System provides advanced
cockpit functionality and improved situational awareness through the
use of fully integrated flight, engine, communication, navigation and
monitoring equipment. The system consists of the following
components:
• GDU Primary Flight Display (PFD)
• GDU Multifunction Display (MFD)
• GCU 478 Flight Management System Keyboard
• GRS 77 Attitude and Heading Reference System
• GDC 74A Air Data Computer
• GIA 63W Integrated Avionics Units
• GEA 71 Engine Airframe Unit
• GTX 32 Mode A, C Transponder
• GMA 347 Audio Panel with Integrated Marker Beacon Receiver
• GFC 700 3-Axis Autopilot and GMC 705 Controller (Optional)
• GTX 33 Mode S Transponder (Optional)
• GDL 69/69A XM Satellite Weather/Radio Receiver (Optional)
- GRT 10 XM Radio Remote Transceiver (Optional)
- GRC 10 XM Radio Remote Control (Optional)
• S-Tec System 55X Autopilot with Optional Flight Director
• S-Tec System 55SR (Optional)
• L-3 Skywatch Traffic Advisory System (Optional)
• L-3 Stormscope WX-500 Weather Mapping Sensor (Optional)
• Bendix/King KR 87 Automatic Direction Finder (Optional)
• Bendix/King KN 63 Distance Measuring Equipment (Optional)
• Synthetic Vision System (Optional)
• Max Viz Enhanced Vision System (Optional)
Refer to the Perspective Integrated Avionics System Pilot’s Guide for a
detailed description of the system and it’s operating modes.
March 2010
Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-67
Figure 7-15
Perspective Integrated Avionics System Schematic
TRANSPONDER
ENGINE
AIRFRAME UNIT
AIR DATA
COMPUTER
PITCH TRIM ADAPTER
YAW SERVO
(optional)
ROLL SERVO
PITCH SERVO
AHRS 1
AHRS 2
(optional)
XM RADIO
RECEIVER
(optional)
SATELLITE DATA
LINK RECEIVER
(optional)
FMS KEYBOARD
AUTOPILOT
MODE CONTROLLER
(optional)
MAG 1 MAG 2
INTEGRATED
AVIONICS UNIT 1 INTEGRATED
AVIONICS UNIT 2
SR22_FM07_2915
PFD
AUDIO PANEL
MFD
March 2010
7-68 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
GDU Primary Flight Display
The Primary Flight Display, located directly in front of the pilot, is
intended to be the primary display of flight parameter information
(attitude, airspeed, heading, and altitude) during normal operations.
The PFD accepts data from a variety of sources, including the MFD
and the Integrated Avionics Units through a high-speed data bus
connection. In conjunction with Flight Management System Keyboard,
the PFD also controls and displays all communication and navigation
　
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