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Cirrus Design
Section 9
SR22
Supplements
Section 7 - System Description
• Caution •
Prolonged operation of the system in clear air, at very high
altitudes, and very cold temperatures can result in “flash”
evaporation of water and alcohol from the de-icing fluid. This
evaporation results in a glycol rich fluid that could become
“gel” like on the wing surface until the aircraft enters cloud or
descends to warmer temperatures.
The Ice Protection System can prevent, and in certain conditions,
remove ice accumulation on the flight surfaces by distributing a thin
film of glycol-based fluid on the wing, horizontal stabilizer, and
propeller. The presence of this fluid lowers the freezing temperature
on the flight surface below that of the ambient precipitation preventing
the formation and adhesion of ice. The system consists of wing and
horizontal stabilizer porous panels, propeller slinger ring, proportioning
units, metering pump, filter, strainer, fluid tank, activation switch, filler
cap, system plumbing, and attaching hardware. The system operates
on 28 VDC supplied through the 5-amp ICE PROTECTION circuit
breaker on Main Bus 1.
De-icing Fluid Tank
Serials before G3 Wing; The de-icing fluid tank is serviced through a
filler located on the LH side of the fuselage, just forward of the
baggage door. The fluid tank, located behind the rear cabin trim panel,
has a total capacity of 2.9 gallon (11.0 L).
Serials with G3 Wing; The de-icing fluid tank is serviced through a filler
located on the upper LH wing. The fluid tank, integral to the LH wing,
has a total capacity of 3.5 gallon (13.2 L). A float type quantity sensor
installed in the de-icing fluid tank supplies quantity level information to
the Engine Airframe Unit.
Switching
Serials 0334 thru 0434; A three-position switch mounted on the center
console panel controls system operation.
Serials 0435 thru 2333, 2335 thru 2419, and 2421 thru 2437; Two
switches are mounted on the bolster panel. The first switch controls
Revision 07: 05-13-08