Alternate Air Control; Engine Indicating - Cirrus SR22 Pilot Operating Handbook

Section 7
Airplane Description
proportion of fuel. The full aft position (CUTOFF) closes the control
valve.
Start/Ignition Switch
Airplane serials 0435 and subsequent with PFD: The Start/
Ignition Switch is located on the instrument panel.
A rotary-type key switch, located on the left bolster, controls ignition
and starter operation. The switch is labeled OFF-R-L- BOTH-START.
In the OFF position, the starter is electrically isolated, the magnetos
are grounded and will not operate. Normally, the engine is operated on
both magnetos (switch in BOTH position) except for magneto checks
and emergency operations. The R and L positions are used for
individual magneto checks and for single magneto operation when
required. When the battery master switch is ON, rotating the switch to
the spring loaded START position energizes the starter and activates
both magnetos. The switch automatically returns to the BOTH position
when released.

Alternate Air Control

An Alternate Induction Air Control knob, labeled ALT AIR – PULL, is
installed on the left console near the pilot's right ankle. To operate the
control, depress the center lock button, pull the knob to the open
position, and then release the lock button. Pulling the knob opens the
alternate air induction door on the engine induction air manifold,
bypasses the air filter, and allows warm unfiltered air to enter the
engine. Alternate induction air should be used if blocking of the normal
air source is suspected. Operation using alternate induction air should
be minimized and the cause of filter blocking corrected as soon as
practical.

Engine Indicating

The SR22 is equipped with engine instrumentation and warning lights
to monitor the engine performance.
For additional information on instrument limit markings, refer
to Section 2, Limitations.
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Cirrus Design
SR22
P/N 13772-001
Revision A5