Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 623

CESSNA
MODEL 208B 867 SHP
GARMIN G1000
GROUND DEICE/ANTI-ICE OPERATIONS
Deicing fluids are not intended for use in removing snow
deposits. Snow is best removed by mechanically sweeping
or brushing it from the airplane structure. Use caution not to
damage any airplane structure or antennas when removing
snow.
Deicing may be accomplished using the ambient temperature available
from a heated hangar or by mechanical means using a glycol-based
Freezing Point Depressant (FPD) Type I fluid. A heated hangar is an
excellent option to deice airplanes and must be utilized whenever
possible. However, care must be exercised to make sure that all melted
precipitation is removed from the airplane to prevent refreezing once
the airplane is moved from the hangar to the flight line. Type I deicing
fluids should be sprayed on the airplane (with engine shutdown) in a
manner that minimizes heat loss of fluid to the air. The fluid should be
applied in a temperature range from 160°F to 180°F (71°C to 82°C)
using a solid cone pattern of large coarse droplets. Fluid should be
sprayed as close as possible to the airplane surfaces, but not closer
than approximately 10 feet if a high-pressure nozzle is used.
Application techniques for Type II, Type III, and Type IV fluids are the
same as Type I, except that since the airplane is already clean, the
application should last only long enough to properly coat the airplane
surfaces. However, Type II, Type III, or Type IV fluid is sometimes
heated and sprayed as a deicing fluid. For this case, it should be
considered a Type I fluid as the heat may change the characteristics of
the thickening agents in the fluid. Therefore, Type II, Type III, or Type IV
fluid applied in this manner will not be as effective as it would be if it
were applied at ambient temperature.
208BPHCUS-00
AIRPLANE HANDLING, SERVICE
NOTE
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SECTION 8
AND MAINTENANCE
(Continued)
8-33
U.S.