Cirrus DESIGN SR22T Pilot Operating Handbook page 344

Section 9
Supplements
Section 4 - Normal Procedures
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 is approved for operation with ice
protection fluid that has a very temperature-dependant
viscosity characteristic. As the temperature of the fluid rises
above freezing (32F / 0C), the fluid becomes much less
viscous (thins) and pass through the porous membrane of the
panels with less resistance (pressure drop). This decrease in
pressure drop reduces the pressure in the panel reservoir
which may not be adequate to wet-out the entire panel if the
Pre-Flight Inspection is performed at warmer temperatures.
Pre-Flight Inspection
1. Cabin
a. Circuit Breakers ................................................................. SET
b. Battery 1 Master Switch ..................................................... ON
c. Ice Protection System Mode..........................HIGH/MAXIMUM
2. Empennage
a. Serials before G3 Wing;
Fluid Tank ................................ VERIFY DESIRED QUANTITY
b. Stabilizer Porous Panels..................CONDITION / SECURITY
(1) Verify Evidence of Deicing Fluid Along Length of Panels.
3. Right Wing Forward and Main Gear
a. Wing Porous Panels ........................CONDITION / SECURITY
(1) Verify Evidence of Deicing Fluid Along Length of Panels.
4. Nose Gear, Propeller, Spinner
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• Caution •
• Note •
Cirrus Design
SR22 / SR22T
P/N 13772-115
Revision 09: 12-17-10