3A-16 P/N 13772-003
Section 3A Cirrus Design
Abnormal Procedures SR22T
Pitot Static System
Pitot Static Malfunction
Static Source Blocked
1. Pitot Heat .................................................................................. ON
2. Alternate Static Source .........................................................OPEN
Amplification
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. 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.
Pitot Tube Blocked
1. Pitot Heat .................................................................................. ON
Amplification
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.
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