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LOW VOLTS Warning Light Illuminated
Illumination of the LOW VOLTS light indicates that the voltage
measured at the Essential Bus is 24.5 volts or less. Typically, this
indicates that the airplane is operating on battery power only and both
alternators have failed or are off. If both alternators have failed:
1. Land as soon as practical.
Revision A5
3A-12 P/N 13772-001
Section 3A Cirrus Design
Abnormal Procedures SR22
Communications Failure
Communications failure can occur for a variety of reasons. If, after
following the checklist procedure, communication is not restored,
proceed with FAR/AIM lost communications procedures.
• Note •
In the event of an audio panel power failure the audio panel
connects COM 1 to the pilot’s headset and speakers. Setting
the audio panel ‘Off’ will also connect COM 1 to the pilot’s
headsets and speakers.
1. Switches, Controls ............................................................. CHECK
2. Frequency ....................................................................... CHANGE
3. Circuit Breakers.................................................................. CHECK
4. Headset........................................................................... CHANGE
5. Hand Held Microphone .................................................CONNECT
Revision A5
P/N 13772-001 3A-13
Cirrus Design Section 3A
SR22 Abnormal Procedures
Pitot Static Malfunction
Static Source Blocked
If erroneous readings of the static source instruments (airspeed,
altimeter and vertical speed) are suspected, the alternate static source
valve, on side of console near pilot’s right ankle, should be opened to
supply static pressure from the cabin to these instruments.
• Note •
If selecting the alternate static source does not work, in an
emergency, cabin pressure can be supplied to the static
pressure instruments by breaking the glass in the face of the
vertical speed indicator. When static pressure is supplied
through the vertical speed indicator, the vertical speed UPDOWN
indications will be reversed (i.e., the needle will
indicate UP for descent and DOWN for climb).
With the alternate static source on, adjust indicated airspeed slightly
during climb or approach according to the Airspeed Calibration
(Alternate Static Source) table in Section 5 as appropriate for vent/
heater configuration.
1. Pitot Heat ...................................................................................ON
2. Alternate Static Source .........................................................OPEN
Pitot Tube Blocked
If only the airspeed indicator is providing erroneous information, and in
icing conditions, the most probable cause is pitot ice. If setting Pitot
Heat ON does not correct the problem, descend to warmer air. If an
approach must be made with a blocked Pitot tube, use known pitch
and power settings and the GPS groundspeed indicator, taking
surface winds into account.
1. Pitot Heat ...................................................................................ON
Revision A5
3A-14 P/N 13772-001
Section 3A Cirrus Design
Abnormal Procedures SR22
Electric Trim/Autopilot Failure
Any failure or malfunction of the electric trim or autopilot can be overridden
by use of the control yoke. If runaway trim is the problem, deenergize
the circuit by pulling the circuit breaker (PITCH TRIM, ROLL
TRIM, or AUTOPILOT) and land as soon as conditions permit.
1. Airplane Control ......................................... MAINTAIN MANUALLY
2. Autopilot (if engaged) .....................................................Disengage
If Problem Is Not Corrected:
3. Circuit Breakers................................................ PULL AS Required
• PITCH TRIM
• ROLL TRIM
• AUTOPILOT
4. Power Lever ........................................................... AS REQUIRED
5. Control Yoke................................. MANUALLY HOLD PRESSURE
6. Land as soon as practical.
Revision A7
P/N 13772-001 4-1
Cirrus Design Section 4
SR22 Normal Procedures
Section 4
Normal Procedures
Table of Contents
Introduction .....................................................................................4-3
Airspeeds for Normal Operation .....................................................4-4
Normal Procedures .........................................................................4-5
Preflight Inspection ......................................................................4-5
Preflight Walk-Around..................................................................4-6
　
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