Pitot Static System; Pitot Static Malfunction - Cirrus SR20 Information Manual

Cirrus Design Section 3A
SR20 Abnormal Procedures

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.
P/N 13999-004 Info Manual 3A-15
September 2011