Alternate Air Control; Engine Indicating - Cirrus DESIGN SR20 Information Manual

Section 7
Airplane Description
Start/Ignition Switch
A rotary-type key switch, located on the left bolster panel, 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 BAT 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 SR20 is equipped with engine instruments and warning lights to
monitor the engine performance. The instruments are located on the
right side of the instrument panel and the warning lights are located in
the annunciator panel immediately in front of the pilot.
For additional information on instrument limit markings, refer
to Section 2, Limitations.
7-36
• Note •
Cirrus Design
P/N 13999-002 Info Manual
September 2011
SR20